Direct measurement of the camel-back energy surface in A1As and its evolution in an electric field

Hyunsik Im, L. E. Bremme, P. C. Klipstein, A. V. Kornilov, H. Beere, D. Ritchie, R. Grey, G. Hill

Research output: Contribution to journalArticlepeer-review

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Abstract

We report the direct measurement of the A1As conduction band dispersion near the band edge. The six lobes of its constant energy surface are much more spherical than previously supposed, with a ratio of major to minor axes of less than 2. The existence of a "camel back" is confirmed. The k·p interaction responsible for the camel back is found to be about three times the presently accepted value. A consequence is that above some critical electric field applied perpendicular to an A1As quantum well, the sub-band constant energy surface is rotated by 45°. We confirm this behavior experimentally in the same sample.

Original languageEnglish
Article number205313
Pages (from-to)205313-1-205313-6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number20
DOIs
StatePublished - Nov 2004
Externally publishedYes

Bibliographical note

Funding Information:
This work was funded by E.P.S.R.C. of the U.K. H. Im and L.E.B. acknowledge support from the QSRC at Dongguk University and the Rhodes Trust, respectively.

Funding

This work was funded by E.P.S.R.C. of the U.K. H. Im and L.E.B. acknowledge support from the QSRC at Dongguk University and the Rhodes Trust, respectively.

FundersFunder number
E.P.S.R.C.
QSRC
Rhodes Trust
Dongguk University

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