Abstract
We calculate the exact Kohn-Sham (KS) scalar and vector potentials that reproduce, within current density functional theory, the steady-state density and current density corresponding to an electron quasiparticle added to the ground state of a model quantum wire. Our results show that, even in the absence of an external magnetic field, a KS description of a steady-state system in general requires a nonzero exchange-correlation magnetic field that is purely mechanical in origin. The KS paramagnetic current density is not, in general, that of the interacting system in any gauge.
Original language | English |
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Article number | 95115 |
Journal | Physical Review B: Condensed Matter and Materials Physics |
Volume | 88 |
Issue number | 19 |
DOIs | |
Publication status | Published - 8 Nov 2013 |