Band alignments and offsets in In(As,Sb)/InAs superlattices

Y. B. Li; D. J. Bain; L. Hart; M. Livingstone; C. M. Ciesla; M. J. Pullin; P. J P Tang; W. T. Yuen; I. Galbraith; C. C. Phillips; C. R. Pidgeon; R. A. Stradling

doi:10.1103/PhysRevB.55.4589

Band alignments and offsets in In(As,Sb)/InAs superlattices

Y. B. Li, D. J. Bain, L. Hart, M. Livingstone, C. M. Ciesla, M. J. Pullin, P. J P Tang, W. T. Yuen, I. Galbraith, C. C. Phillips, C. R. Pidgeon, R. A. Stradling

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

The band alignments and band offsets were investigated for In(As,Sb)/InAs superlattices of various periods and compositions. Magnetoabsorption experiments allowed identification of subband energies and in-plane reduced masses. Using an 8×8 k · p band-structure calculation which takes account of nonparabolicity, va-lence subband mixing, and strain effects, we are able to fit calculated absorption curves to transition energies and reduced masses. Comparison of fits on several samples confirm that the electrons lie in the In(As,Sb) layer and the holes in the InAs layer. By using the fitted curve offsets, we are able to calculate the fractional conduction-band-offset parameter, Q_c , which for a type-II heterostructure can be greater than 1 and which we found to be 2.06±0.11.

Original language	English
Pages (from-to)	4589-4595
Number of pages	7
Journal	Physical Review B: Condensed Matter and Materials Physics
Volume	55
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevB.55.4589
Publication status	Published - 15 Feb 1997

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title = "Band alignments and offsets in In(As,Sb)/InAs superlattices",

abstract = "The band alignments and band offsets were investigated for In(As,Sb)/InAs superlattices of various periods and compositions. Magnetoabsorption experiments allowed identification of subband energies and in-plane reduced masses. Using an 8×8 k · p band-structure calculation which takes account of nonparabolicity, va-lence subband mixing, and strain effects, we are able to fit calculated absorption curves to transition energies and reduced masses. Comparison of fits on several samples confirm that the electrons lie in the In(As,Sb) layer and the holes in the InAs layer. By using the fitted curve offsets, we are able to calculate the fractional conduction-band-offset parameter, Qc , which for a type-II heterostructure can be greater than 1 and which we found to be 2.06±0.11.",

author = "Li, {Y. B.} and Bain, {D. J.} and L. Hart and M. Livingstone and Ciesla, {C. M.} and Pullin, {M. J.} and Tang, {P. J P} and Yuen, {W. T.} and I. Galbraith and Phillips, {C. C.} and Pidgeon, {C. R.} and Stradling, {R. A.}",

year = "1997",

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doi = "10.1103/PhysRevB.55.4589",

language = "English",

volume = "55",

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journal = "Physical Review B: Condensed Matter and Materials Physics",

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T1 - Band alignments and offsets in In(As,Sb)/InAs superlattices

AU - Li, Y. B.

AU - Bain, D. J.

AU - Hart, L.

AU - Livingstone, M.

AU - Ciesla, C. M.

AU - Pullin, M. J.

AU - Tang, P. J P

AU - Yuen, W. T.

AU - Galbraith, I.

AU - Phillips, C. C.

AU - Pidgeon, C. R.

AU - Stradling, R. A.

PY - 1997/2/15

Y1 - 1997/2/15

N2 - The band alignments and band offsets were investigated for In(As,Sb)/InAs superlattices of various periods and compositions. Magnetoabsorption experiments allowed identification of subband energies and in-plane reduced masses. Using an 8×8 k · p band-structure calculation which takes account of nonparabolicity, va-lence subband mixing, and strain effects, we are able to fit calculated absorption curves to transition energies and reduced masses. Comparison of fits on several samples confirm that the electrons lie in the In(As,Sb) layer and the holes in the InAs layer. By using the fitted curve offsets, we are able to calculate the fractional conduction-band-offset parameter, Qc , which for a type-II heterostructure can be greater than 1 and which we found to be 2.06±0.11.

AB - The band alignments and band offsets were investigated for In(As,Sb)/InAs superlattices of various periods and compositions. Magnetoabsorption experiments allowed identification of subband energies and in-plane reduced masses. Using an 8×8 k · p band-structure calculation which takes account of nonparabolicity, va-lence subband mixing, and strain effects, we are able to fit calculated absorption curves to transition energies and reduced masses. Comparison of fits on several samples confirm that the electrons lie in the In(As,Sb) layer and the holes in the InAs layer. By using the fitted curve offsets, we are able to calculate the fractional conduction-band-offset parameter, Qc , which for a type-II heterostructure can be greater than 1 and which we found to be 2.06±0.11.

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DO - 10.1103/PhysRevB.55.4589

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EP - 4595

JO - Physical Review B: Condensed Matter and Materials Physics

JF - Physical Review B: Condensed Matter and Materials Physics

IS - 7

ER -

Band alignments and offsets in In(As,Sb)/InAs superlattices

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