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Author (up) 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 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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  Series Volume Series Issue Edition  
  ISSN 00319007 (ISSN) ISBN Medium  
  Area Expedition Conference  
  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 (up) Griessen, R.; Wen Hai-Hu; Van Dalen, A.J.J.; Dam, B.; Rector, J.; Schnack, H.G.; Libbrecht, S.; Osquiguil, E.; Bruynseraede, Y. url  openurl
  Title Evidence for mean free path fluctuation induced pinning in YBa2Cu3O7 and YBa2Cu4O8 films Type Journal Article
  Year 1994 Publication Physical Review Letters Abbreviated Journal  
  Volume 72 Issue 12 Pages 1910-1913  
  Keywords  
  Abstract The critical current jc and the pinning energy Uc have been determined for three types of yttrium-based superconducting films from current js and dynamic relaxation Q=d lnjs/d ln(dB/dt) data by means of the generalized inversion scheme. For B<2 T and T<80 K the temperature dependence of jc and Uc for all films is found to be in excellent agreement with a model of single vortices pinned by randomly distributed weak pinning centers via spatial fluctuations of the charge carrier mean free path. Pinning due to spatial fluctuations of Tc is not observed.  
  Address Laboratorium voor Vaste Stof-Fysika en Magnetisme, Katholieke Universiteit Leuven, 4001-Leuven, Belgium  
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  Series Editor Series Title Abbreviated Series Title  
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  ISSN 00319007 (ISSN) ISBN Medium  
  Area Expedition Conference  
  Notes Cited By (since 1996): 103; Export Date: 17 April 2009; Source: Scopus; doi: 10.1103/PhysRevLett.72.1910; Language of Original Document: English; Correspondence Address: Griessen, R.; Faculty of Physics and Astronomy; Free University 1081 HV Amsterdam, Netherlands Approved no  
  Call Number BT @ osquigui @ Serial 389  
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Author (up) 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 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  
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  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 (up) Grigera, S.A.; Morre, E.; Osquiguil, E.; Balseiro, C.; Nieva, G.; de la Cruz, F. openurl 
  Title Bose-glass phase in twinned YBa2Cu3O7-delta Type Journal Article
  Year 1998 Publication PHYSICAL REVIEW LETTERS Abbreviated Journal  
  Volume 81 Issue 11 Pages 2348-2351  
  Keywords  
  Abstract Using an extensive scaling analysis of the transport properties in twinned YBa2Cu3O7-delta 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 +/- 0.3.  
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  ISSN 0031-9007 ISBN Medium  
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  Notes ISI:000075897300042 Approved no  
  Call Number BT @ hernan @ Serial 235  
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Author (up) Hoffmann, A.; Nieva, G.; Guimpel, J.; Bruynseraede, Y.; Santamaria, J.; Lederman, D.; Schuller, I.K. openurl 
  Title Comment on “Photoemission study of YBa2Cu3Oy thin films under light illumination” Type Journal Article
  Year 2006 Publication PHYSICAL REVIEW LETTERS Abbreviated Journal  
  Volume 97 Issue 11 Pages 119701  
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  Notes ISI:000240545600075 Approved no  
  Call Number BT @ hernan @ Serial 154  
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Author (up) Jenkins N.; Fasano Y.; Berthod C.; Maggio-Aprile I.; Piriou A.; Giannini E.; Hoogenboom B. W.; Hess C.; Cren T.; Fischer Ø. url  doi
openurl 
  Title Imaging the essential role of spin-fluctuations in high-Tc superconductivity Type Journal Article
  Year 2009 Publication Physical Review Letters Abbreviated Journal  
  Volume 103 Issue Pages 227001-227004  
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  Abstract We have used scanning tunneling spectroscopy to investigate short-length electronic correlations in three-layer Bi2Sr2Ca2Cu3O10+δ (Bi-2223). We show that the superconducting gap and the energy Ωdip, defined as the difference between the dip minimum and the gap, are both modulated in space following the lattice superstructure and are locally anticorrelated. Based on fits of our data to a microscopic strong-coupling model, we show that Ωdip is an accurate measure of the collective-mode energy in Bi-2223. We conclude that the collective mode responsible for the dip is a local excitation with a doping dependent energy and is most likely the (Ï€, Ï€) spin resonance.  
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  Call Number BT @ yanina.fasano @ Serial 591  
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Author (up) Killer, U.; Scheidt, E.-W.; Eickerling, G.; Michor, H.; Sereni, J.; Pruschke, T.; Kehrein, S. url  doi
openurl 
  Title Unusual Single-Ion Non-Fermi-Liquid Behavior in Ce{1-x}La{x}Ni{9}Ge{4} Type Journal Article
  Year 2004 Publication Physical Review Letters Abbreviated Journal Phys. Rev. Lett.  
  Volume 93 Issue 21 Pages 216404  
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  Publisher American Physical Society Place of Publication Editor  
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  Call Number BT @ pedrazp @ 10.1103/PhysRevLett.93.216404 Serial 660  
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Author (up) Kuchler, R.; Gegenwart, P.; Custers, J.; Stockert, O.; Caroca-Canales, N.; Geibel, C.; Sereni, J.G.; Steglich, F. doi  openurl
  Title Quantum criticality in the cubic heavy-fermion system CeIn3-xSnx Type Journal Article
  Year 2006 Publication Physical Review Letters Abbreviated Journal Phys. Rev. Lett.  
  Volume 96 Issue 25 Pages 256403  
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  Abstract We report a comprehensive study of CeIn3-xSnx (0.55 <= x <= 0.8) single crystals close to the antiferromagnetic quantum-critical point (QCP) at x(c)approximate to 0.67 by means of the low-temperature thermal expansion and Gruneisen parameter. This system represents the first example for a cubic heavy fermion in which T-N can be suppressed continuously down to T=0. A characteristic sign change of the Gruneisen parameter between the antiferromagnetic and paramagnetic states indicates the accumulation of entropy close to the QCP. The observed quantum-critical behavior is compatible with the predictions of the itinerant theory for three-dimensional critical spin fluctuations. This has important implications for the role of the dimensionality in heavy-fermion QCPs.  
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  Notes ISI:000238697000041 Approved no  
  Call Number BT @ hernan @ Serial 55  
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Author (up) 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 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 (up) 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 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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