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Ab initio formulation of the four-point conductance of interacting electronic systems

Bokes, P., Jung, J. and Godby, R. W. (2007) Ab initio formulation of the four-point conductance of interacting electronic systems. Physical Review B (PRB). 125433. -. ISSN 1098-0121

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Abstract

We derive an expression for the four-point conductance of a general quantum junction in terms of the density response function. Our formulation allows us to show that the four-point conductance of an interacting electronic system possessing either a geometrical constriction and/or an opaque barrier becomes identical to the macroscopically measurable two-point conductance. Within time-dependent density-functional theory the formulation leads to a direct identification of the functional form of the exchange-correlation kernel that is important for the conductance. We demonstrate the practical implementation of our formula for a metal-vacuum-metal interface.

Item Type: Article
Copyright, Publisher and Additional Information: © 2007 American Physical Society. This is an author produced version of a paper published in Physical Review B. Uploaded in accordance with the publisher's self archiving policy.
Keywords: DENSITY-FUNCTIONAL THEORY, LANDAUER FORMULA, LINEAR-RESPONSE, TRANSPORT
Institution: The University of York
Academic Units: The University of York > Physics (York)
Depositing User: Physics Import
Date Deposited: 19 Aug 2008 08:48
Last Modified: 14 Oct 2014 09:25
Published Version: http://dx.doi.org/10.1103/PhysRevB.76.125433
Status: Published
Refereed: Yes
Related URLs:
URI: http://eprints.whiterose.ac.uk/id/eprint/4032

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