Tunneling conductance and local density of states in tight-binding junctions

被引：35

作者：

Berthod, C. ^{[1
]}

Giamarchi, T. ^{[1
]}

机构：

[1] Univ Geneva, DPMC MaNEP, CH-1211 Geneva 4, Switzerland

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 15期

基金：

瑞士国家科学基金会;

关键词：

TRANSFER-HAMILTONIAN FORMALISM; MANY-PARTICLE POINT; VORTEX CORE STATES; OF-STATES; QUANTUM TRANSPORT; IMPURITY ATOMS; SHOT-NOISE; SUPERCONDUCTIVITY; SPECTROSCOPY; MICROSCOPE;

D O I：

10.1103/PhysRevB.84.155414

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the relationship between the differential conductance and the local density of states in tight-binding tunnel junctions where the junction geometry can be varied between the point-contact and the planar-contact limits. The conductances are found to differ significantly in these two limiting cases. We also examine how the matrix element influences the tunneling characteristics and produces contrast in a simple model of scanning tunneling microscope (STM). Some implications regarding the interpretation of STM spectroscopic data in the cuprates are discussed. The calculations are carried out within the real-space Keldysh formalism.

引用

页数：13

共 89 条

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