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

TY - JOUR

T1 - Comment on "Dynamical corrections to the DFT-LDA electron conductance in nanoscale systems"

AU - Jung, J.

AU - Bokes, P.

AU - Godby, R. W.

N1 - © 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]

PY - 2007/6/22

Y1 - 2007/6/22

N2 - 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.

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.

U2 - 10.1103/PhysRevLett.98.259701

DO - 10.1103/PhysRevLett.98.259701

M3 - Article

VL - 98

SP - -

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 25

M1 - 259701

ER -