Quantum conductance of homogeneous and inhomogeneous interacting electron systems

Godby, R.W., Bokes, P. and Jung, J. (2006) Quantum conductance of homogeneous and inhomogeneous interacting electron systems. arXiv.

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Abstract

We obtain the conductance of a system of electrons connected to leads, within time-dependent density-functional theory, using a direct relation between the conductance and the density response function. Corrections to the non-interacting conductance appear as a consequence of the functional form of the exchange-correlation kernel at small frequencies and wavevectors. The simple adiabatic local-density approximation and non-local density-terms in the kernel both give rise to significant corrections in general. In the homogeneous electron gas, the former correction remains significant, and leads to a failure of linear-response theory for densities below a critical value.

Item Type:	Article
Copyright, Publisher and Additional Information:	© 2006 The Authors. Paper from arXiv.org arXiv:cond-mat/0604317v1. For resolution of the here published results see Bokes, P., Jung, J. and Godby, R.W. (2007) Ab-initio formulation of the 4-point conductance of interacting electronic systems. Physical Review B, 76 (12). Art. No. 125433. (In this repository as http://eprints.whiterose.ac.uk/4032/)
Academic Units:	The University of York > Physics (York)
Depositing User:	Physics Import
Date Deposited:	19 Aug 2008 10:06
Last Modified:	19 Feb 2013 11:44
Status:	Published
Refereed:	Yes
Related URLs:	http://arxiv.org/abs/cond-mat/0604317 http://arxiv.org/abs/cond-mat/0604317
URI:	http://eprints.whiterose.ac.uk/id/eprint/4027

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