Verification of nodeless superconducting pairing in single-crystal YBa 2Cu3O7

Document Type

Conference Proceeding

Publication Date

8-10-2003

Abstract

The temperature and field dependence of the penetration depth was determined from muon spin rotation (μ+SR) measurements on a single crystal of YBa2Cu3O7 having a superconducting transition at Tc ≈ 91.3 K. Data were acquired at applied magnetic fields of 0.05, 1.0, 3.0, and 6.0 Tesla, yielding results inconsistent with any pairing state requiring nodes, including d-wave pairing. These data are, however, completely consistent with s-wave (or extended s-wave) superconductivity, with clear evidence of field-dependent, temperature-activated vortex pinning. Our results confirm the s-wave character originally observed in 1989, and show that the features of μ+SR (and microwave) data used by other authors as evidence for d-wave superconductivity are instead due to temperature- and field-dependent vortex pinning/reordering, resulting in significant distortion of the flux lattice.

Identifier

0141791204 (Scopus)

Publication Title

International Journal of Modern Physics B

External Full Text Location

https://doi.org/10.1142/s0217979203021447

ISSN

02179792

First Page

3582

Last Page

3593

Issue

18-20 II

Volume

17

This document is currently not available here.

Share

COinS