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Author Grigera, S.A.; Morr url  openurl
  Title Bose-glass phase in twinned YBa2Cu3O7-? Type Journal Article
  Year 1998 Publication Physical Review Letters Abbreviated Journal Phys Rev Lett  
  Volume 81 Issue 11 Pages (up) 2348-2351  
  Keywords  
  Abstract Using an extensive scaling analysis of the transport properties in twinned YBa2Cu3O7-? crystals we have experimentally found the predicted change in the universality class of the Bose-glass to liquid transition when the magnetic field is applied at small angles away from the direction of the correlated defects. The new dynamical critical exponent is s? = 1.1  
  Address Centro At  
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  ISSN 00319007 (ISSN) ISBN Medium  
  Area Expedition Conference  
  Notes Cited By (since 1996): 67; Export Date: 17 April 2009; Source: Scopus; CODEN: PRLTA; Language of Original Document: English; Correspondence Address: Grigera, S.A.; Centro At Approved no  
  Call Number BT @ osquigui @ Serial 379  
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Author López, D.; Safar, H.; Gammel, P.L.; Huse, D.A.; Majumdar, S.N.; Schneemeyer, L.F.; Bishop, D.J.; Nieva, G.; de la Cruz, F. openurl 
  Title Reply to the Comment: Local versus Non-Local Conductivity in YBa2Cu3O7-d Type Journal Article
  Year 1995 Publication Physical Review Letters Abbreviated Journal Phys. Rev. Lett.  
  Volume 75 Issue Pages (up) 2447  
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  Abstract A Reply to the Comment by Yu. Eltsev and O. Rapp.  
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  Notes Approved no  
  Call Number BT @ gnieva @ Serial 446  
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Author Neerinck, D.; Temst, K.; Baert, M.; Osquiguil, E.; Van Haesendonck, C.; Bruynseraede, Y.; Gilabert, A.; Schuller, I.K. url  openurl
  Title Transition in the flux lattice of artificially layered superconductors Type Journal Article
  Year 1991 Publication Physical Review Letters Abbreviated Journal  
  Volume 67 Issue 18 Pages (up) 2577-2580  
  Keywords  
  Abstract We report a novel magnetic-field dependence of the critical-current density Jc in artificially grown Ge/Pb superlattices. In these layered structures Jc exhibits an unexpected minimum as a function of perpendicular applied field, unlike any ever observed in other superconductor systems. The systematic evolution of this minimum as a function of layer thicknesses, temperature and pinning strength is related to either flux-lattice decoupling or melting.  
  Address Department of Physics, University of California, San Diego, La Jolla, CA 92093-0319  
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  ISSN 00319007 (ISSN) ISBN Medium  
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  Notes Cited By (since 1996): 7; Export Date: 17 April 2009; Source: Scopus; doi: 10.1103/PhysRevLett.67.2577; Language of Original Document: English; Correspondence Address: Neerinck, D.; Laboratorium voor Vaste Stof-Fysika en Magnetisme; Katholieke Universiteit Leuven B-3001 Leuven, Belgium Approved no  
  Call Number BT @ osquigui @ Serial 411  
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Author Fullerton, E.E.; Guimpel, J.; Nakamura, O.; Schuller, I.K. url  openurl
  Title Structure of high-T_{c} superlattices Type Journal Article
  Year 1992 Publication Physical Review Letters Abbreviated Journal Prl  
  Volume 69 Issue 19 Pages (up) 2859  
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  Publisher American Physical Society Place of Publication Editor  
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  Notes Approved no  
  Call Number BT @ jguimpel @ 10.1103/PhysRevLett.69.2859 Serial 612  
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Author Gao, Z.X.; Osquiguil, E.; Maenhoudt, M.; Wuyts, B.; Libbrecht, S.; Bruynseraede, Y. url  openurl
  Title 3D-2D dimensional crossover in YBa2Cu3O7 films Type Journal Article
  Year 1993 Publication Physical Review Letters Abbreviated Journal  
  Volume 71 Issue 19 Pages (up) 3210-3213  
  Keywords  
  Abstract We show that, in fully oxidized YBa2Cu3O7 c-axis oriented films, the changes induced in the angular and field dependence of the magnetoresistivity ?ab by increasing the temperature towards Tc are similar to those caused by a lowering in oxygen content. This remarkable behavior can be interpreted as due to a crossover from a three-dimensional to a two-dimensional system as T approaches Tc. Moreover, our critical current data mimic the behavior observed by Qi Li et al. in YBa2Cu3O7/(PrxY1-x)Ba2Cu3O7 multilayers, suggesting the possibility that chain planes are superconducting.  
  Address Laboratorium Voor Vaste Stof-Fysika en Magnetisme, Katholieke Universiteit Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium  
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  ISSN 00319007 (ISSN) ISBN Medium  
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  Notes Cited By (since 1996): 7; Export Date: 17 April 2009; Source: Scopus; doi: 10.1103/PhysRevLett.71.3210; Language of Original Document: English; Correspondence Address: Gao, Z.X.; Laboratorium Voor Vaste Stof-Fysika en Magnetisme; Katholieke Universiteit Leuven; Celestijnenlaan 200D B-3001 Leuven, Belgium Approved no  
  Call Number BT @ osquigui @ Serial 400  
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Author Decca, R.S.; Drew, H.D.; Osquiguil, E.; Maiorov, B.; Guimpel, J. openurl 
  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 (up) 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  
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  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  
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  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  
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Author López, D.; Righi, E. F.; Nieva, G.; de la Cruz, F. openurl 
  Title Coincidence of Vortex-Lattice Melting and Loss of Vortex Correlation along the c Direction in Untwinned YBa2Cu3O7-δ Single Crystals Type Journal Article
  Year 1996 Publication Physical Review Letters Abbreviated Journal Phys. Rev. Lett.  
  Volume 76 Issue Pages (up) 4034  
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  Abstract We report on transport measurements using the dc flux transformer configuration in clean and twinned single crystals of YBa2Cu3O7-δ. We show that correlated disorder changes not only the order of the solid-liquid phase transition but also the nature of the vortices in the liquid state. In clean crystals, melting is shown to take place between a solid of vortex lines and a liquid with no correlation in the direction of the magnetic field.  
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  Call Number BT @ gnieva @ Serial 448  
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Author Pedrazzini, P.; Wilhelm, H.; Jaccard, D.; Jarlborg, T.; Schmidt, M.; Hanfland, M.; Akselrud, L.; Yuan, H. Q.; Schwarz, U.; Grin, Yu.; Steglich, F. url  doi
openurl 
  Title Metallic State in Cubic FeGe Beyond Its Quantum Phase Transition Type Journal Article
  Year 2007 Publication Physical Review Letters Abbreviated Journal Phys. Rev. Lett.  
  Volume 98 Issue Pages (up) 047204  
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  Abstract We report on results of electrical resistivity and structural investigations on the cubic modification of FeGe under high pressure. The long-wavelength helical order (TC=280K) is suppressed at a critical pressure pc≈19GPa. An anomaly at TX(p) and strong deviations from a Fermi-liquid behavior in a wide pressure range above pc suggest that the suppression of TC disagrees with the standard notion of a quantum critical phase transition. The metallic ground state persisting at high pressure can be described by band-structure calculations if zero-point motion is included. The shortest FeGe interatomic distance display discontinuous changes in the pressure dependence close to the TC(p) phase line.  
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  Call Number BT @ pedrazp @ Serial 468  
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Author Correa, V.F.; Nieva, G.; de la Cruz, F. openurl 
  Title Vortex softening: Origin of the second peak effect in Bi2Sr2CaCu2O8+delta Type Journal Article
  Year 2001 Publication PHYSICAL REVIEW LETTERS Abbreviated Journal  
  Volume 87 Issue 5 Pages (up) 057003  
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  Abstract Magnetic hysteresis and transverse ac permeability measurements in Bi2Sr2CaCu2O8+delta allow a comparative analysis of the critical current with the elastic response of vortex structures, in equilibrium with their pinning potential, in the field and temperature region where the second peak is detected. This study provides strong evidence that the second peak has its origin in changes of the elastic equilibrium properties of the vortex structures.  
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  ISSN 0031-9007 ISBN Medium  
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  Notes ISI:000170212200049 Approved no  
  Call Number BT @ hernan @ Serial 215  
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Author Bridoux, G.; Nieva, G.; de la Cruz, F. openurl 
  Title Phase-coherence effects in vortex transport entropy Type Journal Article
  Year 2008 Publication PHYSICAL REVIEW LETTERS Abbreviated Journal  
  Volume 101 Issue 11 Pages (up) 117002  
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  Abstract Nernst and electrical resistivity measurements in superconducting YBa2Cu3O7-delta and Bi2Sr2CaCu2O8+delta with and without columnar defects show a distinctive thermodynamics of the respective liquid vortex matter. At a field-dependent high temperature region in the H-T phase diagram, the Nernst signal is independent of structural defects in both materials. At lower temperatures, in YBa2Cu3O7-delta, defects contribute only to the vortex mobility, and the transport entropy is that of a system of vortex lines. The transition to lower temperatures in Bi2Sr2CaCu2O8+delta has a different origin; the maximum in the Nernst signal when decreasing temperature is not associated with transport properties but with the entropy behavior of pancake vortices in the presence of structural defects.  
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  Notes ISI:000259188700052 Approved no  
  Call Number BT @ hernan @ Serial 195  
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