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High-current breakdown of the quantum Hall effect and electron heating in InSb/AlInSb
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Alexander-Webber, J. A., Baker, A. M. R., Buckle, P. D., Ashley, T. and Nicholas, R. J. (2012) High-current breakdown of the quantum Hall effect and electron heating in InSb/AlInSb. Physical Review B (Condensed Matter and Materials Physics), Volume 86 (Number 4). Article number 045404. doi:10.1103/PhysRevB.86.045404 ISSN 1098-0121.
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Official URL: http://dx.doi.org/10.1103/PhysRevB.86.045404
Abstract
We report measurements of the temperature and electric field dependent breakdown of the quantum Hall effect in two-dimensional InSb/AlInSb heterostructures. The electron temperature Te is studied as a function of electric field and it is shown that the energy loss rates of electrons to the lattice follow a (Te3−TL3) dependence for 2 K<Te<22 K at a lattice temperature TL=1.5 K. The high-current induced breakdown of the quantum Hall effect (QHE) is linearly proportional to sample width as deduced from the Hall resistivity and shows breakdown at lower current densities as deduced from the resistivity (ρxx) due to nonuniformity in carrier density. Temperature dependent studies show that the quantum Hall effect persists to considerably higher temperatures than the conventional GaAs/AlGaAs system. Using the energy loss rates, we describe the QHE breakdown in terms of bootstrap-type electron heating.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
| Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 1098-0121 | ||||
| Official Date: | 2012 | ||||
| Dates: |
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| Volume: | Volume 86 | ||||
| Number: | Number 4 | ||||
| Page Range: | Article number 045404 | ||||
| DOI: | 10.1103/PhysRevB.86.045404 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) |
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