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Influence of band state mixing on interband magnetotunnelling in broken-gap heterostructures

Zakharova, A and Chao, Koung-An LU (2002) In Journal of Physics: Condensed Matter1990-01-01+01:00 14(19). p.5003-5016
Abstract
We investigate in detail the effect of electron and light- and heavy-hole state mixing on the transmission coefficients and current-voltage characteristics of interband tunnelling broken-gap heterostructures in the presence of a quantizing magnetic field perpendicular to the interfaces. Double-barrier and barrierless resonant tunnelling structures made from InAs, A1Sb, and GaSb are considered. The multiband Burt envelope function theory and the cylindrical approximation are used to obtain analytical solutions for bulk dispersions, and wavefunctions in heterostructures are derived with the transfer matrix method. Taking into account the mixing of the states of different Landau-level indices at the interfaces due to the spin-orbit... (More)
We investigate in detail the effect of electron and light- and heavy-hole state mixing on the transmission coefficients and current-voltage characteristics of interband tunnelling broken-gap heterostructures in the presence of a quantizing magnetic field perpendicular to the interfaces. Double-barrier and barrierless resonant tunnelling structures made from InAs, A1Sb, and GaSb are considered. The multiband Burt envelope function theory and the cylindrical approximation are used to obtain analytical solutions for bulk dispersions, and wavefunctions in heterostructures are derived with the transfer matrix method. Taking into account the mixing of the states of different Landau-level indices at the interfaces due to the spin-orbit interaction, we have calculated the transmission coefficients for the coherent tunnelling transitions between the states of various Landau levels, as well as the corresponding tunnelling current components. We have shown that the mixing with the heavy-hole states results in additional peaks of the current density. The tunnelling processes in which the Landau-level index is not conserved may contribute significantly to these additional peaks. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physics: Condensed Matter1990-01-01+01:00
volume
14
issue
19
pages
5003 - 5016
publisher
IOP Publishing
external identifiers
  • wos:000175951700024
  • scopus:0037141185
ISSN
1361-648X
DOI
10.1088/0953-8984/14/19/322
language
English
LU publication?
yes
id
4d9f339f-fdfe-4632-80c7-5db39569a06f (old id 336230)
date added to LUP
2007-11-09 16:25:46
date last changed
2017-01-01 07:02:46
@article{4d9f339f-fdfe-4632-80c7-5db39569a06f,
  abstract     = {We investigate in detail the effect of electron and light- and heavy-hole state mixing on the transmission coefficients and current-voltage characteristics of interband tunnelling broken-gap heterostructures in the presence of a quantizing magnetic field perpendicular to the interfaces. Double-barrier and barrierless resonant tunnelling structures made from InAs, A1Sb, and GaSb are considered. The multiband Burt envelope function theory and the cylindrical approximation are used to obtain analytical solutions for bulk dispersions, and wavefunctions in heterostructures are derived with the transfer matrix method. Taking into account the mixing of the states of different Landau-level indices at the interfaces due to the spin-orbit interaction, we have calculated the transmission coefficients for the coherent tunnelling transitions between the states of various Landau levels, as well as the corresponding tunnelling current components. We have shown that the mixing with the heavy-hole states results in additional peaks of the current density. The tunnelling processes in which the Landau-level index is not conserved may contribute significantly to these additional peaks.},
  author       = {Zakharova, A and Chao, Koung-An},
  issn         = {1361-648X},
  language     = {eng},
  number       = {19},
  pages        = {5003--5016},
  publisher    = {IOP Publishing},
  series       = {Journal of Physics: Condensed Matter1990-01-01+01:00},
  title        = {Influence of band state mixing on interband magnetotunnelling in broken-gap heterostructures},
  url          = {http://dx.doi.org/10.1088/0953-8984/14/19/322},
  volume       = {14},
  year         = {2002},
}