Godby, R.W., Bokes, P. and Jung, J. (2006) Quantum conductance of homogeneous and inhomogeneous interacting electron systems. arXiv.
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.
|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/)|
|Institution:||The University of York|
|Academic Units:||The University of York > Physics (York)|
|Depositing User:||Physics Import|
|Date Deposited:||19 Aug 2008 10:06|
|Last Modified:||26 Mar 2015 07:27|