1207.3617 (Debabrata Biswas)

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

Debabrata Biswas

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.

View original: http://arxiv.org/abs/1207.3617