Advanced

Scattering-assisted electric current in semiconductor superlattices in the Wannier-Stark regime

Tarakanov, YA; Vettchinkina, Valeria LU ; Odnoblyudov, MA; Chao, Koung-An LU ; Sekine, N and Hirakawa, K (2005) In Physical Review B (Condensed Matter and Materials Physics) 72(12).
Abstract
We have used the Monte Carlo technique to investigate the mechanism of scattering-assisted charge transport in semiconductor superlattices under a strong applied electric field in the Wannier-Stark (WS) regime. The distribution function of quasi-two-dimensional carriers localized in each WS level is calculated, and the contributions of different scattering mechanisms to the total scattering probability are analyzed. Based on these results, the drift velocity is derived as a function of the applied electric field. Due to the LO-phonon-induced resonant transfer of electrons between different spatially localized WS states, our calculated I-V characteristics oscillates with clear negative differential velocity behavior. At the electric field... (More)
We have used the Monte Carlo technique to investigate the mechanism of scattering-assisted charge transport in semiconductor superlattices under a strong applied electric field in the Wannier-Stark (WS) regime. The distribution function of quasi-two-dimensional carriers localized in each WS level is calculated, and the contributions of different scattering mechanisms to the total scattering probability are analyzed. Based on these results, the drift velocity is derived as a function of the applied electric field. Due to the LO-phonon-induced resonant transfer of electrons between different spatially localized WS states, our calculated I-V characteristics oscillates with clear negative differential velocity behavior. At the electric field strength such that the Bloch oscillation energy is equal to an integer multiple of the LO phonon energy, a peak appears in the I-V curve. Our theoretical result agrees with the experimental data which was obtained from analyzing the terahertz response of superlattices to picosecond optical pulse excitation. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B (Condensed Matter and Materials Physics)
volume
72
issue
12
publisher
American Physical Society
external identifiers
  • wos:000232229400111
  • scopus:29744469397
ISSN
1098-0121
DOI
10.1103/PhysRevB.72.125345
language
English
LU publication?
yes
id
21d22390-cf5f-4de3-bac1-25b3477ba249 (old id 909117)
date added to LUP
2008-01-21 11:24:15
date last changed
2017-01-01 07:25:10
@article{21d22390-cf5f-4de3-bac1-25b3477ba249,
  abstract     = {We have used the Monte Carlo technique to investigate the mechanism of scattering-assisted charge transport in semiconductor superlattices under a strong applied electric field in the Wannier-Stark (WS) regime. The distribution function of quasi-two-dimensional carriers localized in each WS level is calculated, and the contributions of different scattering mechanisms to the total scattering probability are analyzed. Based on these results, the drift velocity is derived as a function of the applied electric field. Due to the LO-phonon-induced resonant transfer of electrons between different spatially localized WS states, our calculated I-V characteristics oscillates with clear negative differential velocity behavior. At the electric field strength such that the Bloch oscillation energy is equal to an integer multiple of the LO phonon energy, a peak appears in the I-V curve. Our theoretical result agrees with the experimental data which was obtained from analyzing the terahertz response of superlattices to picosecond optical pulse excitation.},
  author       = {Tarakanov, YA and Vettchinkina, Valeria and Odnoblyudov, MA and Chao, Koung-An and Sekine, N and Hirakawa, K},
  issn         = {1098-0121},
  language     = {eng},
  number       = {12},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Scattering-assisted electric current in semiconductor superlattices in the Wannier-Stark regime},
  url          = {http://dx.doi.org/10.1103/PhysRevB.72.125345},
  volume       = {72},
  year         = {2005},
}