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Applicability of the kp method to modeling of InAs/GaSb short-period superlattices

Hong, B. H.; Rybchenko, S. I.; Itskevich, I. E.; Haywood, S. K.; Intartaglia, R.; Tasco, V.; Rainò, G.; De Giorgi, M.


B. H. Hong

I. E. Itskevich

S. K. Haywood

R. Intartaglia

V. Tasco

G. Rainò

M. De Giorgi


We investigate the long-standing controversy surrounding modeling of the electronic spectra of InAs/GaSb short-period superlattices (SPSLs). Most commonly, such modeling for semiconductor heterostructures is based on the kp method. However, this method has so far failed to predict the band structure for type-II InAs/GaSb SPSLs. Instead, it has systematically overestimated the energy gap between the electron and heavy-hole minibands, which led to the suggestion that the kp method is inadequate for these heterostructures. Our results show that the physical origin of the discrepancy between modeling and experimental results may be the graded and asymmetric InAs/GaSb interface profile. We have performed band-structure modeling within the kp method using a realistic interface profile based on experimental observations. Our calculations show good agreement with experimental data, both from our own measurements and from the published literature. © 2009 The American Physical Society.


Hong, B. H., Rybchenko, S. I., Itskevich, I. E., Haywood, S. K., Intartaglia, R., Tasco, V., …De Giorgi, M. (2009). Applicability of the kp method to modeling of InAs/GaSb short-period superlattices. Physical review B: Condensed matter and materials physics, 79(16), 165323-1-165323-4.

Journal Article Type Article
Acceptance Date Jan 6, 2009
Online Publication Date Apr 30, 2009
Publication Date Apr 1, 2009
Deposit Date Nov 13, 2014
Publicly Available Date Nov 23, 2017
Journal Physical review. B
Print ISSN 1098-0121
Electronic ISSN 1550-235X
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 79
Issue 16
Article Number ARTN 165323
Pages 165323-1-165323-4
Keywords Electronic, Optical and Magnetic Materials; Condensed Matter Physics
Public URL
Publisher URL
Additional Information Copy of article first published in: Physical review. B, 2009, v.79, issue 16


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Copyright Statement
©2009 American Physical Society

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