Band-edge properties of Hg-based superlattices

Journal Article · Wed Mar 01 04:00:00 EST 1989 · J. Vac. Sci. Technol., A; (United States)

DOI:https://doi.org/10.1116/1.576192· OSTI ID:6555225

Meyer, J R; Hoffman, C A; Bartoli, F J; Schulman, J N

Recent advances in the understanding of band-edge properties in Hg-based superlattices are discussed. A systematic consideration of the theoretical band structure as a function of superlattice parameters demonstrates that the in-plane and growth-direction dispersion relations for the uppermost valence band are extremely sensitive to whether the valence-band offset is small or large. Magnetotransport measurements have been performed on a large number of HgTe--CdTe and Hg/sub 1-//sub x/Zn/sub x/Te--CdTe superlattices. Band gaps determined from the temperature dependence of the intrinsic carrier density are found to agree well with theoretical values if a large value (350 meV) is employed for the valence-band offset. Furthermore, the electron and hole mobilities display a number of distinctive features which are quite consistent with calculated band structures as long as a large valence-band offset is employed. However, the data and theory cannot be reconciled if a small offset is assumed.

• Research Organization: Naval Research Laboratory, Washington, D. C. 20375
• OSTI ID: 6555225
• Journal Information: J. Vac. Sci. Technol., A; (United States), Journal Name: J. Vac. Sci. Technol., A; (United States) Vol. 7:2; ISSN JVTAD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
BAND THEORY
CADMIUM COMPOUNDS
CADMIUM TELLURIDES
CHALCOGENIDES
CHARGE CARRIERS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
MAGNETORESISTANCE
MERCURY COMPOUNDS
MERCURY TELLURIDES
PARAMETRIC ANALYSIS
PHYSICAL PROPERTIES
SUPERLATTICES
TELLURIDES
TELLURIUM COMPOUNDS