Quantum transport: The link between standard approaches in superlattices

Details Quantum transport: The link between standard approaches in superlattices Quantum transport: The link between standard approaches in superlattices

1997-11-14

arxiv.org/abs/cond-mat/9711138v2

Physical Review Letters, Vol. 80, page 369 (1998)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 Pages

Scientific paper

10.1103/PhysRevLett.80.369

Theories describing electrical transport in semiconductor superlattices can essentially be divided in three disjoint categories: i) transport in a miniband; ii) hopping between Wannier-Stark ladders; and iii) sequential tunneling. We present a quantum transport model, based on nonequilibrium Green functions, which, in the appropriate limits, reproduces the three conventional theories, and describes the transport in the previously unaccessible region of the parameter space.

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