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

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

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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 languageEnglish
Article number259701
Pages (from-to)-
Number of pages1
JournalPhysical Review Letters
Issue number25
Publication statusPublished - 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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