Comment on "Dynamical corrections to the DFT-LDA electron conductance in nanoscale systems"

J. Jung; P. Bokes; R. W. Godby

doi:10.1103/PhysRevLett.98.259701

Comment on "Dynamical corrections to the DFT-LDA electron conductance in nanoscale systems"

J. Jung, P. Bokes, R. W. Godby

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

In a recent paper Sai et al. [1] identified a correction R^{dyn}$ to the DC conductance of nanoscale junctions arising from dynamical exchange-correlation (XC) effects within time-dependent density functional theory. This quantity contributes to the total resistance through $R=R_{s}+R^{dyn}$ where $R_{s}$ is the resistance evaluated in the absence of dynamical $XC$ effects. In this Comment we show that the numerical estimation of $R^{dyn}$ in example systems of the type they considered should be considerably reduced, once a more appropriate form for the shear electron viscosity ¿ is used.

Original language	English
Article number	259701
Pages (from-to)	-
Number of pages	1
Journal	Physical Review Letters
Volume	98
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.98.259701
Publication status	Published - 22 Jun 2007

Bibliographical note

© 2007 American Physical Society. Paper published in Physical Review Letters and uploaded in accordance with the publisher's self archiving policy. NB uploaded to arXiv as: "Treatment of electron viscosity in quantum conductance" arXiv:0706.0140v1 [cond-mat.mtrl-sci]

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10.1103/PhysRevLett.98.259701

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Cite this

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abstract = "In a recent paper Sai et al. [1] identified a correction R^{dyn}$ to the DC conductance of nanoscale junctions arising from dynamical exchange-correlation (XC) effects within time-dependent density functional theory. This quantity contributes to the total resistance through $R=R_{s}+R^{dyn}$ where $R_{s}$ is the resistance evaluated in the absence of dynamical $XC$ effects. In this Comment we show that the numerical estimation of $R^{dyn}$ in example systems of the type they considered should be considerably reduced, once a more appropriate form for the shear electron viscosity ¿ is used.",

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AU - Godby, R. W.

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AB - In a recent paper Sai et al. [1] identified a correction R^{dyn}$ to the DC conductance of nanoscale junctions arising from dynamical exchange-correlation (XC) effects within time-dependent density functional theory. This quantity contributes to the total resistance through $R=R_{s}+R^{dyn}$ where $R_{s}$ is the resistance evaluated in the absence of dynamical $XC$ effects. In this Comment we show that the numerical estimation of $R^{dyn}$ in example systems of the type they considered should be considerably reduced, once a more appropriate form for the shear electron viscosity ¿ is used.

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