The quasiparticle DOS in the vortex state of YBa2Cu3O7 inferred from specific heat measurements

被引：0

作者：

Revaz, B ^{[1
]}

Genoud, JY ^{[1
]}

Junod, A ^{[1
]}

Erb, A ^{[1
]}

Walker, E ^{[1
]}

机构：

[1] Univ Geneva, Dept Phys Mat Condensee, CH-1211 Geneva 4, Switzerland

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1998年 / 59卷 / 10-12期

关键词：

density of state; vortices peaks; specific heat; electronic structure;

D O I：

10.1016/S0022-3697(98)00188-7

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The specific heat C(B,T) of an YBa2Cu3O7.00 single crystal is measured from 1.2 to 10 K in magnetic fields up to 14 T. The anisotropic component C-aniso(T, B) = C(T, B parallel to c) - C(T, B perpendicular to c) is a pure vortex quantity. Our data suggest that the electronic density of state (DOS) due to the vortices peaks at E = E-F, a very unusual behaviour. This result, necessary for thermodynamic considerations, agrees with a recent d-wave calculation. Moreover, this model predicts a scaling relation that is followed by our data. Our experimental range corresponds to a crossover region where the limit C-aniso(T,B) proportional to TB1/2 used in former works does not strictly apply. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：2118 / 2120

页数：3

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