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Author Lopez, D.; Righi, E. F.; Nieva, G.; de la Cruz, F.; Kwok, W. K.; Fendrich, J. A.; Crabtree, G. W.; Paulius, L.
Title Amplification of the c-axis vortex correlation by twin-boundary pinning at the vortex liquid-solid phase transition Type Journal Article
Year 1996 Publication PHYSICAL REVIEW B Abbreviated Journal Phys. Rev. B
Volume 53 Issue Pages R8895
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Abstract Transport measurements using the dc flux transformer configuration together with c-axis resistance data in clean and twinned YBa2Cu3O7-δ single crystals show that vortices are localized by the twin-boundary potential. The results support the existence of a divergent tilt modulus [D. R. Nelson and V. M. Vinokur, Phys. Rev. B 48, 13 060 (1993)] in a liquid that freezes into a Bose glass
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Call Number BT @ gnieva @ Serial 447
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Author López, D.; Righi, E. F.; Nieva, G.; de la Cruz, F.
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 López, D.; Jagla, E. A.; Righi, E. F.; Osquiguil, E.; Nieva, G.; Morré, E.; de la Cruz, F.; Balseiro, C. A.
Title Dynamic softening of vortex lines in YBa2Cu3O7−δ single crystals Type Journal Article
Year 1996 Publication Physica C: Superconductivity Abbreviated Journal Physica C
Volume 260 Issue 3-4 Pages 211-216
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Abstract Transport measurements in the mixed state of oxygen-deficient YBa2Cu3O7−δ single crystals using the flux transformer configuration show that the flux liquid changes with increasing anisotropy from strongly correlated to uncorrelated in the field direction. For intermediate coupling, the current inducing loss of vortex correlation has a maximum near the irreversibility temperature. Thus, an effective softening of vortex lines with decreasing temperature is detected. We propose a simple model that accounts for this behavior by including the effects of the pinning potential on the dynamics of vortices.
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Call Number BT @ gnieva @ Serial 454
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Author de la Cruz, F.; López, D.; Righi, E. F.; Nieva, G.
Title Comparative Study of Vortex Correlation in Twinned and Untwinned YBa2Cu3O7 Single Crystals Type Conference Article
Year 1996 Publication Proceedings of the 10th Anniversary Hts Workshop on Physics, Materials and Applications Abbreviated Journal
Volume Issue Pages 395
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Publisher World Scientific Publishing Company Place of Publication Singapore Editor Batlogg, B.
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ISSN ISBN 9810227159 Medium
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Call Number BT @ gnieva @ Serial 461
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Author López, D.; Righi, E. F.; Nieva, G.; de la Cruz, F.; Kwok, W. K.; Fendrich, J. A.; Crabtree, G. W.; Paulius, L.
Title Discontinuous Onset of the c-axis Vortex Correlation at the Melting Transition in YBa2Cu3O7 Type Conference Article
Year 1996 Publication Proceedings of the 10th Anniversary Hts Workshop on Physics, Materials and Applications Abbreviated Journal
Volume Issue Pages 411
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Corporate Author (up) Thesis
Publisher World Scientific Publishing Company Place of Publication Singapore Editor Batlogg, B.
Language Summary Language Original Title
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ISSN ISBN 9810227159 Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ gnieva @ Serial 462
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Author Righi, E. F.; Grigera, S. A.; Nieva, G.; de la Cruz, F.
Title Vortex phase coherence along the c axis in YBa2Cu3O7-d Type Journal Article
Year 1998 Publication Superconduvtivity Reviews Abbreviated Journal
Volume 2 Issue Pages 205
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ISSN 1054-2698 ISBN Medium
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Call Number BT @ gnieva @ Serial 465
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