Spatial and dynamical properties of optical phonons in AlxGa1-xAs and GaAs/AlxGa1-xAs superlattices: Beyond the mean field approach

D. S. Kim; P. H. Song; S. H. Jhi; Y. S. Lim; E. J. Shin; Y. H. Yee; J. S. Khim; J. Ihm; J. H. Lee; J. S. Chang; D. H. Woo; K. N. Kang; D. Kim; J. J. Song

doi:10.1016/0921-4526(95)00853-5

Spatial and dynamical properties of optical phonons in Al_xGa_1-xAs and GaAs/Al_xGa_1-xAs superlattices: Beyond the mean field approach

D. S. Kim
, P. H. Song
, S. H. Jhi
, Y. S. Lim
, E. J. Shin
, Y. H. Yee
, J. S. Khim
, J. Ihm
, J. H. Lee
, J. S. Chang
, D. H. Woo
, K. N. Kang
, D. Kim
, J. J. Song

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

Abstract

Spatial and dynamical properties of optical phonons in Al_xGa_1-xAs alloys and GaAs/Al_xGa_1-xAs quantum wells are studied. An isotopically disordered harmonic crystal model is developed to study spatial properties of optical phonons in Al_xGa_1-xAs alloys. In the GaAs/Al_xGa_1-xAs system, transmission of the GaAs optical phonons through an Al_xGa_1-xAs barrier is studied using three-dimensional lattice dynamical model, fully accounting for the random arrangement of Ga and Al atoms in the alloy barrier. In the Al_xGa_1-xAs alloy, a localized-to-extended transition is found as a function of x. In GaAs/Al_xGa_1-xAs quantum wells, the transmission coefficient of the GaAs LO phonons through the alloy barrier remains significant below x < 0.3. These results are in good qualitative agreement with the experimentally deduced coherence length of LO phonons from nonequilibrium hot phonon populations.

Original language	English
Pages (from-to)	684-686
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	219-220
Issue number	1-4
DOIs	https://doi.org/10.1016/0921-4526(95)00853-5
State	Published - 1 Apr 1996

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Kim, D. S., Song, P. H., Jhi, S. H., Lim, Y. S., Shin, E. J., Yee, Y. H., Khim, J. S., Ihm, J., Lee, J. H., Chang, J. S., Woo, D. H., Kang, K. N., Kim, D., & Song, J. J. (1996). Spatial and dynamical properties of optical phonons in Al_xGa_1-xAs and GaAs/Al_xGa_1-xAs superlattices: Beyond the mean field approach. Physica B: Condensed Matter, 219-220(1-4), 684-686. https://doi.org/10.1016/0921-4526(95)00853-5

@article{017db2c125d64b32ac7ab16bc4703b04,

title = "Spatial and dynamical properties of optical phonons in AlxGa1-xAs and GaAs/AlxGa1-xAs superlattices: Beyond the mean field approach",

abstract = "Spatial and dynamical properties of optical phonons in AlxGa1-xAs alloys and GaAs/AlxGa1-xAs quantum wells are studied. An isotopically disordered harmonic crystal model is developed to study spatial properties of optical phonons in AlxGa1-xAs alloys. In the GaAs/AlxGa1-xAs system, transmission of the GaAs optical phonons through an AlxGa1-xAs barrier is studied using three-dimensional lattice dynamical model, fully accounting for the random arrangement of Ga and Al atoms in the alloy barrier. In the AlxGa1-xAs alloy, a localized-to-extended transition is found as a function of x. In GaAs/AlxGa1-xAs quantum wells, the transmission coefficient of the GaAs LO phonons through the alloy barrier remains significant below x < 0.3. These results are in good qualitative agreement with the experimentally deduced coherence length of LO phonons from nonequilibrium hot phonon populations.",

author = "Kim, \{D. S.\} and Song, \{P. H.\} and Jhi, \{S. H.\} and Lim, \{Y. S.\} and Shin, \{E. J.\} and Yee, \{Y. H.\} and Khim, \{J. S.\} and J. Ihm and Lee, \{J. H.\} and Chang, \{J. S.\} and Woo, \{D. H.\} and Kang, \{K. N.\} and D. Kim and Song, \{J. J.\}",

year = "1996",

month = apr,

day = "1",

doi = "10.1016/0921-4526(95)00853-5",

language = "English",

volume = "219-220",

pages = "684--686",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier B.V.",

number = "1-4",

}

Kim, DS, Song, PH, Jhi, SH, Lim, YS, Shin, EJ, Yee, YH, Khim, JS, Ihm, J, Lee, JH, Chang, JS, Woo, DH, Kang, KN, Kim, D & Song, JJ 1996, 'Spatial and dynamical properties of optical phonons in Al_xGa_1-xAs and GaAs/Al_xGa_1-xAs superlattices: Beyond the mean field approach', Physica B: Condensed Matter, vol. 219-220, no. 1-4, pp. 684-686. https://doi.org/10.1016/0921-4526(95)00853-5

TY - JOUR

T1 - Spatial and dynamical properties of optical phonons in AlxGa1-xAs and GaAs/AlxGa1-xAs superlattices

T2 - Beyond the mean field approach

AU - Kim, D. S.

AU - Song, P. H.

AU - Jhi, S. H.

AU - Lim, Y. S.

AU - Shin, E. J.

AU - Yee, Y. H.

AU - Khim, J. S.

AU - Ihm, J.

AU - Lee, J. H.

AU - Chang, J. S.

AU - Woo, D. H.

AU - Kang, K. N.

AU - Kim, D.

AU - Song, J. J.

PY - 1996/4/1

Y1 - 1996/4/1

N2 - Spatial and dynamical properties of optical phonons in AlxGa1-xAs alloys and GaAs/AlxGa1-xAs quantum wells are studied. An isotopically disordered harmonic crystal model is developed to study spatial properties of optical phonons in AlxGa1-xAs alloys. In the GaAs/AlxGa1-xAs system, transmission of the GaAs optical phonons through an AlxGa1-xAs barrier is studied using three-dimensional lattice dynamical model, fully accounting for the random arrangement of Ga and Al atoms in the alloy barrier. In the AlxGa1-xAs alloy, a localized-to-extended transition is found as a function of x. In GaAs/AlxGa1-xAs quantum wells, the transmission coefficient of the GaAs LO phonons through the alloy barrier remains significant below x < 0.3. These results are in good qualitative agreement with the experimentally deduced coherence length of LO phonons from nonequilibrium hot phonon populations.

AB - Spatial and dynamical properties of optical phonons in AlxGa1-xAs alloys and GaAs/AlxGa1-xAs quantum wells are studied. An isotopically disordered harmonic crystal model is developed to study spatial properties of optical phonons in AlxGa1-xAs alloys. In the GaAs/AlxGa1-xAs system, transmission of the GaAs optical phonons through an AlxGa1-xAs barrier is studied using three-dimensional lattice dynamical model, fully accounting for the random arrangement of Ga and Al atoms in the alloy barrier. In the AlxGa1-xAs alloy, a localized-to-extended transition is found as a function of x. In GaAs/AlxGa1-xAs quantum wells, the transmission coefficient of the GaAs LO phonons through the alloy barrier remains significant below x < 0.3. These results are in good qualitative agreement with the experimentally deduced coherence length of LO phonons from nonequilibrium hot phonon populations.

UR - https://www.scopus.com/pages/publications/13544266611

U2 - 10.1016/0921-4526(95)00853-5

DO - 10.1016/0921-4526(95)00853-5

M3 - Article

AN - SCOPUS:13544266611

SN - 0921-4526

VL - 219-220

SP - 684

EP - 686

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 1-4

ER -

Spatial and dynamical properties of optical phonons in Al_xGa_1-xAs and GaAs/Al_xGa_1-xAs superlattices: Beyond the mean field approach

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