Evidence for the coexistence of an anisotropic superconducting gap and nonlocal effects in the nonmagnetic superconductor LuNi2B2C
Date
2004-06-11
Authors
Park, Tuson
Chia, Elbert E. M.
Salamon, M. B.
Bauer, E. D.
Vekhter, I.
Thompson, J. D.
Choi, Eun Mi
Kim, Heon Jung
Lee, Sung-Ik
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American Physical Society
Abstract
A study of the dependence of the heat capacity C-p(alpha) on the field angle in LuNi2B2C reveals an anomalous disorder effect. For pure samples, C-p(alpha) exhibits a fourfold variation as the field H (alpha=0). A slightly disordered sample, however, develops anomalous secondary minima along <110> for mu(0)H>1 T, leading to an eightfold pattern at 2 K and 1.5 T. The anomalous pattern is discussed in terms of coexisting superconducting gap anisotropy and nonlocal effects.
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article
Comments
This article is published as Park, Tuson, Elbert EM Chia, M. B. Salamon, E. D. Bauer, I. Vekhter, J. D. Thompson, Eun Mi Choi, Heon Jung Kim, Sung-Ik Lee, and P. C. Canfield. "Evidence for the Coexistence of an Anisotropic Superconducting Gap and Nonlocal Effects in the Nonmagnetic Superconductor LuNi 2 B 2 C." Physical Review Letters 92, no. 23 (2004): 237002.
DOI: 10.1103/PhysRevLett.92.237002.
Copyright 2004 American Physical Society.
Posted with permission.