Tunneling conductance and local density of states in tight-binding junctions
Superconductivity
2011-10-13 v2 Mesoscale and Nanoscale Physics
Abstract
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.
Keywords
Cite
@article{arxiv.1102.3895,
title = {Tunneling conductance and local density of states in tight-binding junctions},
author = {C. Berthod and T. Giamarchi},
journal= {arXiv preprint arXiv:1102.3895},
year = {2011}
}
Comments
Published version