Andreev and Single Particle Tunneling Spectroscopies in Underdoped Cuprates
Superconductivity
2010-12-08 v2
Abstract
We study tunneling spectroscopy between a normal metal and underdoped cuprate superconductor modeled by a phenomenological theory in which the pseudogap is a precursor to the undoped Mott insulator. In the transparent tunneling limit, the spectra show a small energy gap associated with Andreev reflection. In the Giaever limit, the spectra show a large energy gap associated with single particle tunneling. Our theory semi-quantitatively describes the two gap behavior observed in tunneling experiments.
Keywords
Cite
@article{arxiv.1005.3441,
title = {Andreev and Single Particle Tunneling Spectroscopies in Underdoped Cuprates},
author = {Kai-Yu Yang and Kun Huang and Wei-Qiang Chen and T. M. Rice and Fu-Chun Zhang},
journal= {arXiv preprint arXiv:1005.3441},
year = {2010}
}
Comments
5 pages, 4 figures, submitted to Phys. Rev. Lett. minor changes of references