On the Applicability of Miniband Transport in Semiconductor Superlattices
Abstract
Electrical transport in semiconductor superlattices is often described by a minnband model, where the electrons perform a quasiclassical motion. Although this model is assumed to be valid in the limit of a large miniband width, sonic experiments indicate its validity for narrow minibands as well. By a comparison with a full calculation based on nonequilibrium Green functions we show, that this is the case if the width of the electronic distribution is larger than both the field drop per period and the scattering width. In addition we show that simplified expressions for miniband transport and sequential tunneling become identical in this regime.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1998
- Accession Number
- ADP012729
Entities
People
- Andreas Wacker
- Antti-pekka Jauho