| Records |
Author  |
Decca, R.S.; Drew, H.D.; Maiorov, B.; Guimpel, J.; Osquiguil, E.J. |
| Title |
Inducing superconductivity at a nanoscale: Photodoping with a near- field scanning optical microscope |
Type |
Journal Article |
| Year |
1999 |
Publication |
Journal of Microscopy |
Abbreviated Journal |
J. Microsc. |
| Volume |
194 |
Issue |
2-3 |
Pages |
407-411 |
| Keywords |
High critical temperature superconductors; Near-field microscopy; Photoconductivity; Photoinduced superconductivity; barium; copper derivative; gadolinium; nanoparticle; conductance; conference paper; crystal structure; crystallography; density; fiber optics; film; illumination; magnetic field; photoactivation; priority journal; reflectometry; scanning near field optical microscopy; temperature |
| Abstract |
The local modification of an insulating GdBa2Cu3O6.5 thin film, made superconducting by illumination with a near-field scanning optical microscope (NSOM), is reported. A 100-nm aperture NSOM probe acts as a sub- wavelength light source of wavelength ?(exc)=480-650 nm, locally generating photocarriers in an otherwise insulating GdBa2-Cu3O6.5 thin film. Of the photogenerated electron-hole pairs, electrons are trapped in the crystallographic lattice, defining an electrostatic confining potential to enable the holes to move. Reflectance measurements at ? = 1.55 ?m at room temperature show that photocarriers can be induced and constrained to move on a ?? 200 nm scale for all investigated ?(exc). Photogenerated wires present a superconducting critical temperature T(c) = 12 K with a critical current density J(c) = 104 A cm-2. Exploiting the flexibility provided by photodoping through a NSOM probe, a junction was written by photodoping a wire with a narrow (? 50 nm) under-illuminated gap. The strong magnetic field modulation of the critical current provides a clear signature of the existence of a Josephson effect in the junction. |
| Address |
Ctro. Atomico Bariloche and Inst. B., Comision Nac. de Energia Atomica, 8400 S. C. de Bariloche, RN, Argentina |
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
00222720 (ISSN) |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
Cited By (since 1996): 1; Export Date: 17 April 2009; Source: Scopus; CODEN: JMICA; doi: 10.1046/j.1365-2818.1999.00540.x; Language of Original Document: English; Correspondence Address: Decca, R.S.; Laboratory for Physical Sciences; Department of Physics; University of Maryland College Park, MD 20742, United States; email: rdecca@physics.umd.edu; References: Decca, R.S., Drew, H.D., Empson, K.L., Investigation of the electric-field distribution at the subwavelength aperture of a near-field scanning optical microscope (1997) Appl. Phys. Lett., 70, pp. 1932-1934; Decca, R.S., Drew, H.D., Maiorov, B., Osquiguil, E., Guimpel, J., Photoinduced superconducting nanowires in GdBa2-Cu3O6.5 films (1998) Appl. Phys. Lett., 72, pp. 120-122; Endo, T., Hoffmann, A., Santamaria, J., Schuller, I.K., Enhancement of persistent photoconductivity by uv excitation in GdBa2Cu3O6.3 (1996) Phys. Rev. B., 54, pp. 3750-3752; Federici, J.F., Chew, D., Welker, B., Savin, W., Gutierrez-Solana, J., Fink, T., Wilber, W., Defect mechanism of photoinduced superconductivity in YBa2Cu3O6+x (1995) Phys. Rev. B, 52, pp. 15592-15597; Ginsberg, D.M., (1996) Physical Properties of High Temperature Superconductors V, , World Scientific, Singapore; Guimpel, J., Maiorov, B., Osquiguil, E., Nieva, G., Pardo, F., Interrelation between persistent photoconductivity and oxygen order in GdBa2Cu3Ox thin films (1997) Phys. Rev. B, 56, pp. 3552-3555; Kirilyuk, A.I., Kreines, N.M., Kudinov, V.I., (1990) Pis'ma Zh. Eksp. Teor. Fiz., 52, p. 696. , Frozen photoconductivity in YBaCuO films; JETP Lett., 52, pp. 49-54; Krylov, I.P., (1990) Pis'ma Zh. Eklsp. Teor. Fiz., 52, p. 1049; Mechanism for the frozen photoconductivity of YBa2Cu3O7-? JETP Lett., 52, pp. 442-446; Kudinov, V.I., Chaplygin, I.L., Kirilyuk, A.I., Keines, N.M., Laiho, R.L.E., Ayache, C., Persistent photoconductivity in YBa2Cu3O6+x films as a method of photodoping toward metallic and superconducting phases (1993) Phys. Rev. B, 47, pp. 9017-9028; Lederman, D., Hasen, J., Schuller, I.K., Photoinduced superconductivity and structural changes in high temperature superconducting films (1994) Appl. Phys. Lett., 64, pp. 652-654; Nakamura, O., Fullerton, E.E., Guimpel, J., Schuller, I.K., High Tc thin films with roughness smaller than one unit cell (1992) Appl. Phys. Lett., 60, pp. 120-122; Nieva, G., Osquiguil, E., Guimpel, J., Maenhoudt, M., Wuyts, B., Bruynseraede, Y., Maple, M.P., Schuller, I.K., Photo-induced changes in the transport properties of oxygen-deficient YBa2Cu3Ox (1992) Phys. Rev. B, 46, pp. 14249-14252; Orenstein, J., Thomas, G.A., Millis, A.J., Cooper, S.L., Rapkine, D.H., Timusk, T., Schneemeyer, L.F., Waszczak, J.V., Frequency-and temperature-dependent conductivity in YBa2Cu3O6+x crystals (1990) Phys. Rev. B, 42, pp. 6342-6362; Osquiguil, E., Maenhoudt, M., Wuyts, B., Bruynseraede, Y., Photoexcitation and oxygen ordering in YBa2Cu3Ox films (1994) Phys. Rev. B, 49, pp. 3675-3678; Tinkham, M., (1996) Introduction to Superconductivity, 2nd Edn., , McGraw-Hill, New York |
Approved |
no |
| Call Number |
BT @ osquigui @ |
Serial |
376 |
| Permanent link to this record |
| |
|
| |
| Author |
Decca, R.S.; Drew, H.D.; Osquiguil, E.; Maiorov, B.; Guimpel, J. |
| Title |
Anomalous proximity effect in underdoped YBa2Cu3O6+x Josephson junctions |
Type |
Journal Article |
| Year |
2000 |
Publication |
Physical Review Letters |
Abbreviated Journal |
Phys Rev Lett |
| Volume |
85 |
Issue |
17 |
Pages |
3708-3711 |
| Keywords |
Critical currents; Energy gap; High temperature superconductors; Magnetic field effects; Magnetron sputtering; Mathematical models; Phase diagrams; Phase transitions; Physical properties; Scanning electron microscopy; Superconductivity; Yttrium barium copper oxides; Anomalous proximity effect; Fluctuating phase models; Josephson effect; Photodoping; Josephson junction devices |
| Abstract |
Experiments were carried out to probe the underdoped insulating material by the Josephson effect. Junctions were fabricated by exploiting the capability of locally photodoping insulating RBa2Cu3O6+x (R = rare earth) material. The existence of an anomalously large proximity effect was confirmed. The critical current of the junctions was consisted with the conventional Josephson relationship. |
| Address |
Centro At |
| Corporate Author |
|
Thesis |
|
| Publisher |
American Inst of Physics |
Place of Publication |
Woodbury, NY, United States |
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
00319007 (ISSN) |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
Cited By (since 1996): 36; Export Date: 17 April 2009; Source: Scopus; CODEN: PRLTA; doi: 10.1103/PhysRevLett.85.3708; Language of Original Document: English; Correspondence Address: Decca, R.S.; Univ of Maryland College Park, United States; References: Ginsberg, D.M., (1996) Physical Properties of High Temperature Superconductors V, , World Scientific, Singapore; Zhang, S.C., (1997) Science, 275, p. 1089; Emery, V.J., Kivelson, S.A., (1995) Nature (London), 374, p. 434; Corson, J., (1999) Nature (London), 398, p. 291; Renner, Ch., (1998) Phys. Rev. Lett., 80, p. 149; Demler, E., (1998) Phys. Rev. Lett., 80, p. 2917; Den Hertog, B.C., Berlinsky, A.J., Kallin, C., (1999) Phys. Rev. B, 59, pp. R11645; Emery, V.J., Kivelson, S.A., Zachar, O., (1997) Phys Rev. B, 56, p. 6120; Tinkham, M., (1996) Introduction to Superconductivity, , McGraw-Hill, New York; Decca, R.S., (1998) Appl. Phys. Lett., 73, p. 120; (1999) J. Microsc., 194, p. 407; Osquiguil, E., (1992) Appl. Phys. Lett., 60, p. 1627; Kudinov, V.I., (1993) Phys. Rev. B, 47, p. 9017; Decca, R.S., Drew, H.D., Empson, K.L., (1997) Appl. Phys. Lett., 70, p. 1932; Orenstein, J., (1990) Phys. Rev. B, 42, p. 6342; Nieva, G., (1992) Appl. Phys. Lett., 60, p. 2159; (1992) Phys. Rev. B, 46, p. 14249; notenoteGray, K.E., (1992) Phys. Rev. B, 45, p. 10071; Pauza, A.J., (1997) J. Appl. Phys., 82, p. 5612; Katz, A.S., Woods, S.I., Dynes, R.C., (2000) J. Appl. Phys., 87, p. 2978; noteUR – http://www.scopus.com/scopus/inward/record.url?eid=2-s2.0-19244384844&partnerID=40 |
Approved |
no |
| Call Number |
BT @ osquigui @ |
Serial |
373 |
| Permanent link to this record |
| |
|
| |
| Author |
Deppe, M.; Caroca-Canales, N.; Sereni, J.G.; Geibel, C. |
| Title |
Evidence for a metamagnetic transition in the heavy Fermion system CeTiGe |
Type |
Conference Article |
| Year |
2010 |
Publication |
Journal of Physics: Conference Series |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
| Volume |
200 |
Issue |
|
Pages |
012026 |
| Keywords |
Applied magnetic fields; Canonical systems; Continuous suppression; Critical behavior; Critical fields; DC magnetization; First order; Heavy fermion systems; Higher temperatures; Low temperatures; Metamagnetic; Metamagnetic transitions; Polycrystalline; Cerium; Cerium compounds; Electric resistance; Magnetic field effects; Magnetoresistance; Magnetism |
| Abstract |
A recent study of CeTiGe identified this compound as a paramagnetic heavy Fermion system where the full J = 5/2 multiplet is involved in the formation of the ground state. Here we present a preliminary investigation of the dc-magnetization Mdc(H) and of the magnetoresistance Ï(H) of polycrystalline CeTiGe samples in applied magnetic fields up to μ0H = 14 T. The results reveal a pronounced metamagnetic transition at a critical field μ0Hc ≈ 13.5 T at low temperatures, with a step like increase in Mdc(H) of at least 0.6 μB/Ce. The metamagnetic transition leads to a strong decrease in Ï(H). A clear hysteresis in Mdc(H) and Ï(H) indicate that in CeTiGe these metamagnetic features correspond to a true thermodynamic, first order type transition in contrast to the critical behavior observed in the canonical system CeRu2Si2. Measurements at higher temperatures showed a continuous suppression of the metamagnetic transition with increasing T, which vanishes at T ∼ 30 K. © 2010 IOP Publishing Ltd. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Karlsruhe |
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
International Conference on Magnetism, ICM 2009 |
Abbreviated Series Title |
|
| Series Volume |
200 |
Series Issue |
SECTION 1 |
Edition |
|
| ISSN |
17426588 (ISSN) |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
Conference code: 81773; Export Date: 10 December 2010; Source: Scopus; Art. No.: 012026; doi: 10.1088/1742-6596/200/1/012026; Language of Original Document: English; Correspondence Address: Deppe, M.; Max Planck Institute for Chemical Physics of Solids, D-01187 Dresden, Germany; email: Hicha.Deppe@cpfs.mpg.de; References: Gegenwart, P., Si, Q., Steglich, F., (2008) Nature Phys., 4 (3), p. 186; Sachdev, S., (2008) Nature Phys., 4 (3), p. 173; Blundell, S., (2001) Oxford Master Series in Condensed Matter Physics, , (Oxford University Press); Monthoux, P., Lonzarich, G.G., (2001) Phys. Rev., 63 (5), p. 054529; Morozkin, A.V., Seropegin Yu, D., Leonov, A.V., Sviridov, I.A., Tskhadadze, I.A., Nikitin, S.A., (1998) J. Alloys Comput., 267, pp. 14-15R; Welter, R., Vernière, A., Venturini, G., Malaman, B., (1999) J. Alloys. Compounds, 283 (1-2), p. 54; Deppe, M., Caroca-Canales, N., Hartmann, S., Oeschler, N., Geibel, C., (2009) J. Phys.: Condens. Matter, 21 (20), p. 206001; Hewson, A.C., (1993) The Kondo Problem to Heavy Fermions (Cambridge Studies in Magnetism), 2. , ed D Edwards and D Melville (Cambridge: Cambridge University press); Haen, P., Flouquet, J., Lapierre, F., Lejay, P., Remenyi, G., (1987) J. Low Temp. Phys., 67 (5-6), p. 391; Sakakibara, T., Tayama, T., Matamura, K., Maezawa, K., Onuki, Y., Amitsuka, H., (1995) Phys. Rev., 51 (17), p. 12030; Andreev, A.V., Vejpravov, J., Prokleška, J., Sechovsky, V., (2008) Physica, 403 (5-9), p. 744 |
Approved |
no |
| Call Number |
BT @ berisso @ |
Serial |
599 |
| Permanent link to this record |
| |
|
| |
| Author |
Encina, S.; Pedrazzini, P.; Sereni, J.G.; Geibel, C. |
| Title |
Low temperature thermopower and magnetoresistance of Sc-rich CeSc1-xTixGe |
Type |
Journal Article |
| Year |
2018 |
Publication |
Physica B: Condensed Matter |
Abbreviated Journal |
Physica B |
| Volume |
536 |
Issue |
|
Pages |
133-136 |
| Keywords |
CeScGe; CeTiGe; Antiferromagnetism; Transport properties; Low temperatures; Magnetic field |
| Abstract |
In CeSc1-xTixGe, Ti-alloying reduces the record-high antiferromagnetic (AFM) ordering temperature found in CeScGe at TN=46K and induces ferromagnetism for x≥0.5. In this work we focus on the AFM side, i.e. Sc-rich samples, and study their thermopower S(T) and magnetoresistance Ï(H,T). The measured S(T) is small in comparison with the thermopower of other Ce-systems and shows some features that are compatible with a weak hybridization between the 4f and band states. This is a further hint pointing to the local character of magnetism in this alloy. Magnetic fields up to 16T have a minor effect on the electrical resistivity of stoichiometric CeScGe. On the other hand, for x=0.65, we find that fields above 4T suppress the hump in Ï(T). Furthermore, the 4.2K magnetoresistance displays a strong decrease in the same field range, also in coincidence with magnetization results from the literature. Our results indicate that Ï(T,H) is a proper tool to assess the H−T phase diagram of this system. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0921-4526 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
no |
| Call Number |
BT @ pedrazp @ |
Serial |
765 |
| Permanent link to this record |
| |
|
| |
| Author |
Franco, D.G.; Carbonio, R.E.; Nieva, G. |
| Title |
Change in the Magnetic Domain Alignment Process at the Onset of a Frustrated Magnetic State in Ferrimagnetic La2Ni(Ni1/3Sb2/3)O6 Double Perovskite |
Type |
Journal Article |
| Year |
2013 |
Publication |
IEEE Transactions on Magnetics |
Abbreviated Journal |
IEEE Trans. Magn. |
| Volume |
49 |
Issue |
8 |
Pages |
4656-4659 |
| Keywords |
coercive force; exchange interactions (electron); ferrimagnetic materials; frustration; magnetic domain walls; magnetic hysteresis; magnetic transitions; LaNi(Ni0.33Sb0.67)O6; applied magnetic field; coercive field; domain wall pinning; ferrimagnetic double perovskite; ferrimagnetic order transition; frustrated magnetic state; hysteresis data; low temperature regime; magnetic domain alignment process; magnetic exchange interactions; magnetization hysteresis loops; temperature dependence; Magnetic domain walls; Magnetic domains; Magnetic hysteresis; Magnetization; Nickel; Temperature distribution; Temperature measurement; Ferrimagnetic materials; magnetic analysis; magnetic domain walls; magnetic hysteresis |
| Abstract |
We have performed a combined study of magnetization hysteresis loops and time dependence of the magnetization in a broad temperature range for the ferrimagnetic La2Ni(Ni1/3Sb2/3)O6 double perovskite. This material has a ferrimagnetic order transition at ~100 K and at lower temperatures (~20 K) shows the signature of a frustrated state due to the presence of two competing magnetic exchange interactions. The temperature dependence of the coercive field shows an important upturn below the point where the frustrated state sets in. The use of hysteresis data, magnetization versus applied magnetic field, together with the magnetization versus time data provides a unique opportunity to distinguish between different scenarios for the low temperature regime. From our analysis, a strong domain wall pinning results in the best scenario for the low temperature regime. For temperatures larger than 20 K, the adequate scenario seems to correspond to a weak domain wall pinning. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0018-9464 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
no |
| Call Number |
BT @ pedrazp @ |
Serial |
668 |
| Permanent link to this record |
| |
|
| |
| Author |
Haberkorn, N.; Bridoux, G.; Osquiguil, E.; Nieva, G.; Guimpel, J. |
| Title |
Hall effect in a GdBa2Cu3O7-?/La0.75 Sr0.25MnO3 perovskite bilayer |
Type |
Journal Article |
| Year |
2007 |
Publication |
Applied Surface Science |
Abbreviated Journal |
Appl. Surf. Sci. |
| Volume |
254 |
Issue |
1 SPEC. ISS. |
Pages |
222-224 |
| Keywords |
Hall effect; Perovskite Bilayer; Barium compounds; Ferromagnetic materials; Films; Hall effect; Magnetic fields; Magnetron sputtering; Manganites; Perovskite; Strontium compounds; Superconducting devices; Dc magnetron sputtering; Electric transport; Hall resistivity regimes; Oxygen doping; Gadolinium compounds |
| Abstract |
We present results on the Hall coefficient RH in the normal state for a GdBa2Cu3O7-?/La0.75 Sr0.25MnO3 bilayer and a La0.75Sr0.25MnO3 film grown by dc magnetron sputtering on (1 0 0) SrTiO3. We find that the electric transport on the bilayer can be qualitatively described using a simple parallel layers model. The GdBa2Cu3O7-? layer presents a carrier density approximately equal to that reported for 7 – ? = 6.85 oxygen doping. Also we observe an unexpected presence of two Hall resistivity regimes, effects that may be associated with the internal magnetic field induced on the superconducting layer by the ferromagnetic layer. |
| Address |
Instituto Balseiro, Universidad Nacional de Cuyo, Comisi |
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
01694332 (ISSN) |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
Export Date: 17 April 2009; Source: Scopus; CODEN: ASUSE; doi: 10.1016/j.apsusc.2007.07.041; Language of Original Document: English; Correspondence Address: Haberkorn, N.; Comisi |
Approved |
no |
| Call Number |
BT @ osquigui @ |
Serial |
363 |
| Permanent link to this record |
| |
|
| |
| Author |
Herbsommer, J.A.; Luzuriaga, J.; Cheong, S.-W. |
| Title |
Vortex glass melting in single crystal La1.825 Sr0.075CuO4 |
Type |
Journal Article |
| Year |
1996 |
Publication |
Physica C |
Abbreviated Journal |
Physica C |
| Volume |
258 |
Issue |
1-2 |
Pages |
169-174 |
| Keywords |
Copper compounds; Crystal lattices; Frequency response; Glass; Magnetic field measurement; Magnetic permeability measurement; Melting; Phase diagrams; Single crystals; Temperature; Vortex flow; AC susceptibility; Cuprates; Pinned flux lattice; Oxide superconductors |
| Abstract |
The vortex phase diagram in single crystalline La1.85Sr0.075CuO4 has been studied using an AC-susceptibility technique. A peak in the out-of-phase (x?) component of the susceptibility indicates a transition from a pinned flux lattice (FLL) to an unpinned one. This peak is frequency dependent for all the values of the magnetic field measured (0.01 to 4 T), and this, as well as the general behavior found in the cuprates, has prompted us to interpret our data as evidence for a vortex-glass to liquid transition in the FLL. The activation energies obtained can be fitted to a theory developed by Vinokur et al. Measurements with the magnetic field at an angle with the Cu-O planes may also be understood qualitatively within this framework. |
| Address |
AT and T Bell Laboratories, Murray Hill, NJ, United States |
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
09214534 (ISSN) |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
Cited By (since 1996): 2; Export Date: 28 April 2009; Source: Scopus; CODEN: PHYCE; doi: 10.1016/0921-4534(95)00812-8; Language of Original Document: English; Correspondence Address: Luzuriaga, J.; Centro At |
Approved |
no |
| Call Number |
BT @ luzuriag @ |
Serial |
483 |
| Permanent link to this record |
| |
|
| |
| Author |
Lee, S.-C.; Sullivan, M.; Ruchti, G.R.; Anlage, S.M.; Palmer, B.S.; Maiorov, B.; Osquiguil, E. |
| Title |
Doping-dependent nonlinear Meissner effect and spontaneous currents in high-Tc superconductors |
Type |
Journal Article |
| Year |
2005 |
Publication |
Physical Review B – Condensed Matter and Materials Physics |
Abbreviated Journal |
Phys. Rev. B Condens. Matter Mater. Phys. |
| Volume |
71 |
Issue |
1 |
Pages |
|
| Keywords |
article; electric current; film; magnetic field; magnetism; microwave radiation; nonlinear system; parameter; superconductor; temperature dependence |
| Abstract |
We measure the local harmonic generation from superconducting thin films at microwave frequencies to investigate the intrinsic nonlinear Meissner effect near Tc in the zero magnetic field. Both second and third harmonic generation are measured to identify time-reversal symmetry breaking (TRSB) and time-reversal symmetric (TRS) nonlinearities. We perform a systematic doping-dependent study of the nonlinear response and find that the TRS characteristic nonlinearity current density scale follows the doping dependence of the depairing critical current density. We also extract a spontaneous TRSB characteristic current density scale that onsets at Tc, grows with decreasing temperature, and systematically decreases in magnitude (at fixed T/TC) with underdoping. The origin of this current scale could be Josephson circulating currents or the spontaneous magnetization associated with a TRSB order parameter. |
| Address |
Superconductivity Technology Center, Mail Stop K763, Los Alamos National Laboratory, Los Alamos, NM 87545, United States |
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
10980121 (ISSN) |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
Cited By (since 1996): 4; Export Date: 17 April 2009; Source: Scopus; CODEN: PRBMD; doi: 10.1103/PhysRevB.71.014507; Language of Original Document: English; Correspondence Address: Lee, S.-C.; Ctr. for Superconductivity Research; Department of Physics; University of Maryland College Park, MD 20742-4111, United States; References: Yip, S.K., Sauls, J.A., (1992) Phys. Rev. Lett., 69, p. 2264; Xu, D., Yip, S.K., Sauls, J.A., (1995) Phys. Rev. B, 51, p. 16233; Gittleman, J., Rosenblum, B., Seidel, T.E., Wicklund, A.W., (1965) Phys. Rev., 137, pp. A527; Buan, J., Stojkovic, B.P., Israeloff, N.E., Goldman, A.M., Huang, C.C., Valls, O.T., Liu, J.Z., Shelton, R., (1994) Phys. Rev. Lett., 72, p. 2632; Maeda, A., Iino, Y., Hanaguri, T., Motohira, N., Kishio, K., Fukase, T., (1995) Phys. Rev. Lett., 74, p. 1202; Carrington, A., Giannetta, R.W., Kim, J.T., Giapintzakis, J., (1999) Phys. Rev. B, 59, pp. R14 173; Bidinosti, C.P., Hardy, W.N., Bonn, D.A., Liang, R., (1999) Phys. Rev. Lett., 83, p. 3277; Benz, G., W |
Approved |
no |
| Call Number |
BT @ osquigui @ |
Serial |
365 |
| Permanent link to this record |
| |
|
| |
| Author |
Luzuriaga, J.; Andre, M.-O.; Benoit, W. |
| Title |
Frequency and amplitude response of the flux-line lattice to mechanical perturbation in ceramic YBa2Cu3O7 |
Type |
Journal Article |
| Year |
1992 |
Publication |
Physica C: Superconductivity and its applications |
Abbreviated Journal |
Phys C Supercond Appl |
| Volume |
201 |
Issue |
3-4 |
Pages |
257-262 |
| Keywords |
Copper oxides; Crystal lattices; Frequency response; Internal friction; Lattice vibrations; Magnetic fields; Mathematical models; Mechanical properties; Pendulums; Rheology; Thermal effects; Torque; Yttrium compounds; Amplitude response; Ceramic yttrium barium copper oxides; Extended dry friction model; Flux line lattices; Forced pendulum; Frequency independent dissipation peak; Mechanical response; Thermal activation; High temperature superconductors |
| Abstract |
The mechanical response of the flux-line lattice has been measured with a low-frequency forced pendulum in ceramic YBa2Cu3O7. A dissipation peak observed in temperature sweeps is frequency-independent between 1 mHz and 5 Hz. Dissipation depends strongly on applied torque, and for fixed temperatures this dependence is well fitted by a rheological model of extended dry friction. If the model is extended to take account of thermal activation, however, it does not agree with the measured frequency independence, which is hard to explain within simple models of thermal activation. |
| Address |
Institut de G |
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
09214534 (ISSN) |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
Export Date: 28 April 2009; Source: Scopus; CODEN: PHYCE; Language of Original Document: English; Correspondence Address: Luzuriaga, J.; Institut de G |
Approved |
no |
| Call Number |
BT @ luzuriag @ |
Serial |
487 |
| Permanent link to this record |
| |
|
| |
| Author |
Maiorov, B.; Osquiguil, E. |
| Title |
Bose-glass-like phases in oriented-twin YBa2Cu3O7-? crystals |
Type |
Journal Article |
| Year |
2004 |
Publication |
Journal of Low Temperature Physics |
Abbreviated Journal |
J. Low Temp. Phys. |
| Volume |
135 |
Issue |
1-2 |
Pages |
131-134 |
| Keywords |
Low temperature effects; Magnetic fields; Superconducting materials; Bose-glass phases; Planar random defect array; Yttrium barium copper oxides; physics |
| Abstract |
We experimentally study the dynamical response of the superconducting vortex system near the solid-liquid transition by applying forces parallel and perpendicular to a planar random defect array. Our results show that for magnetic fields above a certain critical field Hcr'? 4 T the solid glassy vortex phase in YBa2Cu3O7-? crystals with oriented twin planes does not correspond to the so-called Bose-glass phase. |
| Address |
Centro At |
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
00222291 (ISSN) |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
Cited By (since 1996): 1; Export Date: 17 April 2009; Source: Scopus; CODEN: JLTPA; Language of Original Document: English; Correspondence Address: Maiorov, B.; Superconductivity Technology Center; Los Alamos Laboratory Los Alamos, NM 87545, United States; References: Crabtree, G., Nelson, D.R., (1997) Phys. Today, 50, p. 38. , and references therein; Nelson, D.R., Vinokur, V.M., (1993) Phys. Rev. Lett., 68, p. 2398. , J. Lidmar and M. Wallin, Europhys. Lett. 47, 494 (1999); Grigera, S.A., (1998) Phys. Rev. Lett., 81, p. 2348; Maiorov, B., Osquiguil, E., (2001) Phys. Rev. B, 64, p. 052511; Maiorov, B., Nieva, G., Osquiguil, E., (2000) Phys. Rev. B., 61, p. 12427; Grigera, S.A., (2001) Phys. Rev. B., 63, p. 212509 |
Approved |
no |
| Call Number |
BT @ osquigui @ |
Serial |
367 |
| Permanent link to this record |
