Scaling beyond 3D XY in the fluctuation conductivity of YBa2Cu3O7-δ

Rosângela Menegotto Costa; Paulo Pureur; Miguel Gusmão; Sadok Senoussi; K. Behnia

doi:10.1016/s0038-1098(99)00428-7

Scaling beyond 3D XY in the fluctuation conductivity of YBa₂Cu₃O_7-δ

Rosângela Menegotto Costa
, Paulo Pureur
, Miguel Gusmão
, Sadok Senoussi
, K. Behnia

Universidade Federal do Rio Grande do Sul
Laboratoire de Physique des Solides

Research output: Contribution to journal › Article › peer-review

Abstract

Systematic measurements of the in-plane fluctuation magnetoconductivity in a YBa₂Cu₃O_7-δ single crystal are presented. Fields up to 500 mT were applied either parallel or perpendicular to the Cu-O planes. The data reveal the occurrence of Gaussian-fluctuation regimes far from the transition. Closer to T_c, the results clearly show the occurrence of a genuine critical regime, where the exponent is consistent with predictions for the 3D XY universality class with model-E dynamics. Still closer to T_c, evidence is found for a fluctuation regime beyond 3D XY. This new scaling can be interpreted as revealing an ultimate first-order character of the superconducting transition in YBa₂Cu₃O_7-δ.

Original language	English
Pages (from-to)	23-27
Number of pages	5
Journal	Solid State Communications
Volume	113
Issue number	1
DOIs	https://doi.org/10.1016/s0038-1098(99)00428-7
Publication status	Published - 16 Nov 1999
Externally published	Yes

Keywords

A. High-T superconductors
D. Electronic transport
D. Phase transitions

Access to Document

10.1016/s0038-1098(99)00428-7

Cite this

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title = "Scaling beyond 3D XY in the fluctuation conductivity of YBa2Cu3O7-δ",

abstract = "Systematic measurements of the in-plane fluctuation magnetoconductivity in a YBa2Cu3O7-δ single crystal are presented. Fields up to 500 mT were applied either parallel or perpendicular to the Cu-O planes. The data reveal the occurrence of Gaussian-fluctuation regimes far from the transition. Closer to Tc, the results clearly show the occurrence of a genuine critical regime, where the exponent is consistent with predictions for the 3D XY universality class with model-E dynamics. Still closer to Tc, evidence is found for a fluctuation regime beyond 3D XY. This new scaling can be interpreted as revealing an ultimate first-order character of the superconducting transition in YBa2Cu3O7-δ.",

keywords = "A. High-T superconductors, D. Electronic transport, D. Phase transitions",

author = "Costa, \{Ros{\^a}ngela Menegotto\} and Paulo Pureur and Miguel Gusm{\~a}o and Sadok Senoussi and K. Behnia",

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TY - JOUR

T1 - Scaling beyond 3D XY in the fluctuation conductivity of YBa2Cu3O7-δ

AU - Costa, Rosângela Menegotto

AU - Pureur, Paulo

AU - Gusmão, Miguel

AU - Senoussi, Sadok

AU - Behnia, K.

PY - 1999/11/16

Y1 - 1999/11/16

N2 - Systematic measurements of the in-plane fluctuation magnetoconductivity in a YBa2Cu3O7-δ single crystal are presented. Fields up to 500 mT were applied either parallel or perpendicular to the Cu-O planes. The data reveal the occurrence of Gaussian-fluctuation regimes far from the transition. Closer to Tc, the results clearly show the occurrence of a genuine critical regime, where the exponent is consistent with predictions for the 3D XY universality class with model-E dynamics. Still closer to Tc, evidence is found for a fluctuation regime beyond 3D XY. This new scaling can be interpreted as revealing an ultimate first-order character of the superconducting transition in YBa2Cu3O7-δ.

AB - Systematic measurements of the in-plane fluctuation magnetoconductivity in a YBa2Cu3O7-δ single crystal are presented. Fields up to 500 mT were applied either parallel or perpendicular to the Cu-O planes. The data reveal the occurrence of Gaussian-fluctuation regimes far from the transition. Closer to Tc, the results clearly show the occurrence of a genuine critical regime, where the exponent is consistent with predictions for the 3D XY universality class with model-E dynamics. Still closer to Tc, evidence is found for a fluctuation regime beyond 3D XY. This new scaling can be interpreted as revealing an ultimate first-order character of the superconducting transition in YBa2Cu3O7-δ.

KW - A. High-T superconductors

KW - D. Electronic transport

KW - D. Phase transitions

U2 - 10.1016/s0038-1098(99)00428-7

DO - 10.1016/s0038-1098(99)00428-7

M3 - Article

AN - SCOPUS:0012759440

SN - 0038-1098

VL - 113

SP - 23

EP - 27

JO - Solid State Communications

JF - Solid State Communications

IS - 1