Comment on "New Scaling of Child-Langmuir Law in the Quantum Regime"

Debabrata Biswas

doi:10.1103/physrevlett.109.219801

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arXiv · 1207.3617

Comment on "New Scaling of Child-Langmuir Law in the Quantum Regime"

Debabrata Biswas

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Abstract

In their letter on the quantum Child-Langmuir law, Ang, Kwan and Lau (Phys. Rev. Lett. 91, 208303 (2003)) include exchange correlation effects within the Kohn-Sham density functional theory and explore numerically the maximum transmitted current in nanogaps. We show here that the calculations are in error as the exchange-correlation component of the chemical potential has been ignored while fixing the boundary conditions for the Hartree potential.

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Debabrata Biswas. 2012-07-16. Comment on "New Scaling of Child-Langmuir Law in the Quantum Regime". https://doi.org/10.1103/physrevlett.109.219801

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