Local density of states near the surface of high-Tc superconductors under magnetic field based on the t-J model

被引：1

作者：

Tanuma, Y ^{[1
]}

Tanaka, Y

Tsuchiura, H

Kashiwaya, S

机构：

[1] Okayama Univ, Dept Phys, Okayama 7008530, Japan

[2] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648063, Japan

[3] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3050045, Japan

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2002年 / 367卷 / 1-4期

基金：

日本学术振兴会;

关键词：

zero-bias conductance peak; broken time-reversal symmetry state; local density of states; magnetic field dependence;

D O I：

10.1016/S0921-4534(01)00997-2

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Quasiparticle states near the surface of d-wave superconductors in a magnetic field are studied based on the t-J model on the 2D square lattice within the Gutzwiller approximation. We perform a calculation on the local density of states near the (I 10) surface, by changing the hole concentration in the presence of applied magnetic field. In the low-doping region, the zero-energy peak (ZEP) is not sensitive to the applied magnetic field. With the increase of the hole concentration, the ZEP splits into two due to the broken time reversal symmetry state with induced subdominant s-wave like component. Even in this case, the position of split peak is insensitive to the applied magnetic field. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：147 / 151

页数：5

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