Entropy of Vortex Cores Near the Superconductor-Insulator Transition in an Underdoped Cuprate

2001/08/31 by C. Capan, Kamran Behnia, K. Behnia +8 · 3 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.88.056601

5 Pages inculding 4 figures

arxiv created 2001/10/24 · openalex publication_date 2002/01/17 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present a study of Nernst effect in underdoped La(2-x)Sr(x)CuO4 in magnetic fields as high as 28 T. At high fields, a sizable Nernst signal was found to persist in the presence of a field-induced nonmetallic resistivity. By simultaneously measuring resistivity and the Nernst coefficient, we extract the entropy of vortex cores in the vicinity of this field-induced superconductor-insulator transition. Moreover, the temperature dependence of the thermoelectric Hall angle provides strong constraints on the possible origins of the finite Nernst signal above T(c), as recently discovered by Xu et al. [Nature (London) 406, 486 (2000)].

Citations

• STM Studies of the Electronic Structure of Vortex Cores inBi2Sr2CaCu2O8+δ
• Magnetic-Field–Induced Localization in the Normal State of SuperconductingLa2−xSrxCuO4
• Metal-to-Insulator Crossover in the Low-Temperature Normal State ofBi2Sr2−xLaxCuO6+δ

Cited by

• Strongly nonlinear magnetization above T c in Bi 2 Sr 2 CaCu 2 O 8 + δ
• Mutual Chern-Simons gauge theory of spontaneous vortex phase
• From Kondo Effect to Fermi Liquid