Gap anisotropy in the angle-resolved photoemission spectroscopy of Bi2Sr2CaCu2O8+δ

被引：2

作者：

Maitra, T

Taraphder, A ^{[1
]}

机构：

[1] Indian Inst Technol, Ctr Theoret Studies, Kharagpur 721302, W Bengal, India

[2] Indian Inst Technol, Dept Phys & Meteorol, Kharagpur 721302, W Bengal, India

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1999年 / 325卷 / 1-2期

关键词：

gap anisotropy; angle-resolved photoemission spectroscopy; Bi2Sr2CaCu2O8+delta;

D O I：

10.1016/S0921-4534(99)00506-7

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The gap anisotropy in Bi2Sr2CaCu2O8+delta is revisited in the framework of a d-wave scenario in view of the recent angle-resolved photoemission experiment. Based on a tight-binding fit to the normal state dispersion, a detailed analysis of the effects of the inclusion of the next harmonic in the d-wave has been presented. Significant effect has been observed in the superconducting T-c,. The density of states is Linear at the nodes with enhanced weight, caused by a marked increase in the low energy excitations which affect the thermodynamics considerably. The slope of the rho(s)-T curve in the low temperature regime increases and the specific heat reflects the enhanced entropy at low temperatures. The leading edge of the ARPES energy distribution curves have been calculated and found to shift towards higher energy. The effect of scattering by non-magnetic impurities in this context is also outlined. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：61 / 69

页数：9

共 39 条

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