The Library
Electronic transport in modulation-doped InSb quantum well heterostructures
Tools
Tools
Tools
Orr, J., Gilbertson, A., Fearn, M., Croad, O., Storey, C., Buckle, L., Emeny, M., Buckle, P. and Ashley, Tim (2008) Electronic transport in modulation-doped InSb quantum well heterostructures. Physical Review B (Condensed Matter and Materials Physics), Volume 77 (Number 16). Article number 165334. doi:10.1103/PhysRevB.77.165334
Research output not available from this repository, contact author.
Official URL: http://dx.doi.org/10.1103/PhysRevB.77.165334
Abstract
The mobility and carrier concentration of a number of InSb-based modulation-doped quantum well heterostructures are examined over a range of temperatures between 4.5 and 300 K. Wide well (30 nm) and narrow well (15 nm) structures are measured. The temperature dependent mobilities are considered within a scattering model that incorporates polar optical and acoustic phonon scatterings, interface roughness scattering, and scattering from charged impurities both in the three-dimensional background and within a distributed “quasi-two-dimensional” doping layer. Room temperature mobilities as high as 51 000 cm2/V s are reported for heterostructures with a carrier concentration of 5.8×1011 cm−2, while low-temperature mobility (below 40 K) reaches 248 000 cm2/V s for a carrier concentration of 3.9×1011 cm−2. A Schrödinger–Poisson model is used to calculate band structures in the material and is shown to accurately predict carrier concentrations over the whole temperature range. Low-temperature mobility is shown to be dominated by remote ionized impurity scattering in wide well samples and by a combination of ionized impurity and interface roughness scattering in narrow well samples.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science > Engineering | ||||
| Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 1098-0121 | ||||
| Official Date: | 28 April 2008 | ||||
| Dates: |
|
||||
| Volume: | Volume 77 | ||||
| Number: | Number 16 | ||||
| Article Number: | Article number 165334 | ||||
| DOI: | 10.1103/PhysRevB.77.165334 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
Request changes or add full text files to a record
Repository staff actions (login required)
 |
View Item |
