Frequency shifted polaron coupling in GaInAs heterostructures

L. C. Brunel; S. Huant; R. J. Nicholas; M. A. Hopkins; M. A. Brummell; K. Karrai; J. C. Portal; M. Razeghi; K. Y. Cheng; A. Y. Cho

doi:10.1016/0039-6028(86)91018-6

Frequency shifted polaron coupling in GaInAs heterostructures

L. C. Brunel^*, S. Huant, R. J. Nicholas, M. A. Hopkins, M. A. Brummell, K. Karrai, J. C. Portal, M. Razeghi, K. Y. Cheng, A. Y. Cho

^*Corresponding author for this work

Electrical and Computer Engineering

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Abstract

Frequency dependent cyclotron resonance measurements are reported on Ga_0.47In_0.53AsInP and Ga_0.47In_0.53AsAl_0.48In_0.52As heterostructures. Discontinuities in the effective mass are observed at two frequencies, due to resonant polaron coupling to the two optic phonon modes in GaInAs. In heterojunctions the coupling occurs at the frequencies of the TO phonons, in contrast to bulk materials, and the relative strength of the coupling to the two modes is different in the two systems. In more lightly doped superlattices the coupling is stronger, leading to larger shifts in the effective mass, and occurs at the LO phonon frequencies. This behaviour is discussed in terms of possible changes in the screening and polarisation of the optic phonon modes.

Original language	English (US)
Pages (from-to)	542-548
Number of pages	7
Journal	Surface Science
Volume	170
Issue number	1-2
DOIs	https://doi.org/10.1016/0039-6028(86)91018-6
State	Published - Apr 3 1986

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/0039-6028(86)91018-6

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title = "Frequency shifted polaron coupling in GaInAs heterostructures",

abstract = "Frequency dependent cyclotron resonance measurements are reported on Ga0.47In0.53AsInP and Ga0.47In0.53AsAl0.48In0.52As heterostructures. Discontinuities in the effective mass are observed at two frequencies, due to resonant polaron coupling to the two optic phonon modes in GaInAs. In heterojunctions the coupling occurs at the frequencies of the TO phonons, in contrast to bulk materials, and the relative strength of the coupling to the two modes is different in the two systems. In more lightly doped superlattices the coupling is stronger, leading to larger shifts in the effective mass, and occurs at the LO phonon frequencies. This behaviour is discussed in terms of possible changes in the screening and polarisation of the optic phonon modes.",

author = "Brunel, {L. C.} and S. Huant and Nicholas, {R. J.} and Hopkins, {M. A.} and Brummell, {M. A.} and K. Karrai and Portal, {J. C.} and M. Razeghi and Cheng, {K. Y.} and Cho, {A. Y.}",

year = "1986",

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doi = "10.1016/0039-6028(86)91018-6",

language = "English (US)",

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pages = "542--548",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier",

number = "1-2",

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TY - JOUR

T1 - Frequency shifted polaron coupling in GaInAs heterostructures

AU - Brunel, L. C.

AU - Huant, S.

AU - Nicholas, R. J.

AU - Hopkins, M. A.

AU - Brummell, M. A.

AU - Karrai, K.

AU - Portal, J. C.

AU - Razeghi, M.

AU - Cheng, K. Y.

AU - Cho, A. Y.

PY - 1986/4/3

Y1 - 1986/4/3

N2 - Frequency dependent cyclotron resonance measurements are reported on Ga0.47In0.53AsInP and Ga0.47In0.53AsAl0.48In0.52As heterostructures. Discontinuities in the effective mass are observed at two frequencies, due to resonant polaron coupling to the two optic phonon modes in GaInAs. In heterojunctions the coupling occurs at the frequencies of the TO phonons, in contrast to bulk materials, and the relative strength of the coupling to the two modes is different in the two systems. In more lightly doped superlattices the coupling is stronger, leading to larger shifts in the effective mass, and occurs at the LO phonon frequencies. This behaviour is discussed in terms of possible changes in the screening and polarisation of the optic phonon modes.

AB - Frequency dependent cyclotron resonance measurements are reported on Ga0.47In0.53AsInP and Ga0.47In0.53AsAl0.48In0.52As heterostructures. Discontinuities in the effective mass are observed at two frequencies, due to resonant polaron coupling to the two optic phonon modes in GaInAs. In heterojunctions the coupling occurs at the frequencies of the TO phonons, in contrast to bulk materials, and the relative strength of the coupling to the two modes is different in the two systems. In more lightly doped superlattices the coupling is stronger, leading to larger shifts in the effective mass, and occurs at the LO phonon frequencies. This behaviour is discussed in terms of possible changes in the screening and polarisation of the optic phonon modes.

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DO - 10.1016/0039-6028(86)91018-6

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VL - 170

SP - 542

EP - 548

JO - Surface Science

JF - Surface Science

IS - 1-2

ER -

Frequency shifted polaron coupling in GaInAs heterostructures

Abstract

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