Frequency dependent admittance of a two-dimensional quantum wire

Details Frequency dependent admittance of a two-dimensional quantum wire Frequency dependent admittance of a two-dimensional quantum wire

1996-08-29

arxiv.org/abs/cond-mat/9608158v1

Physics

Condensed Matter

4 pages, Revtex, submitted to Phys. Rev. B (Rapid Comm.)

Scientific paper

10.1103/PhysRevB.54.R11090

The frequency dependent conductance of a two-dimensional quantum wire is computed using a current conserving formalism. The correction to the dc-conductance due to a time-dependent potential is related to the local partial density of states which we compute numerically. The current conservation is explicitly confirmed by computing the global density of states and comparing it with a quantity which is related to the electron dwell time. Our calculation clearly reveals the physical meaning of the various partial density of states.

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