Thermodynamics and tunneling spectroscopy in the pseudogap regime of the boson-fermion model

被引：9
|
作者：
Domanski, T
Ranninger, J
机构：
[1] Marie Curie Sklodowska Univ, Inst Phys, PL-20031 Lublin, Poland
[2] CNRS, Ctr Rech Tres Basses Temp, F-38042 Grenoble 9, France
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2003年 / 387卷 / 1-2期
关键词：
thermodynamic properties; boson-fermion model; pseudogap;
D O I：
10.1016/S0921-4534(03)00645-2
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Motivated by the STM experimental data on Bi2Sr2CaCu2O8+x which indicate the tunneling conductance asymmetry sigma(-V) not equal sigma(V), we report that such a behavior can be explained in terms of the boson-fermion model. It has been shown in the recent studies, based on various selfconsistent techniques to capture the many-body effects, that the low energy spectrum of the boson-fermion model is featured by an appearance of the pseudogap at T* > T-c. We argue that the pseudogap structure has to exhibit a particle-hole asymmetry. This asymmetry may eventually depend on the boson concentration. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：77 / 81
页数：5
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