Indirect-Energy-Gap Dependence on Al Concentration in Alxga1-Xas Alloys
1992
Abstract
The energy of the indirect X exciton in AlxGa1-xAs epitaxial layers (with 0.38 < x < 0.81) has been determined by photoluminescence measurements at a sample temperature of 12 K; from these data, the dependence on the Al concentration x of the energy of the GAMMA-X gap has been obtained: E(g)X(x) = 1.988 + 0.207x + 0.055x2 eV. This relation is characterized by a very small bowing. From our data we deduce also the coordinates of the GAMMA-X crossover point: x(c) = 0.385 +/- 0.016 and E(c) = 2076 +/- 4 meV at T = 0 K and x(c) = 0.396 +/- 0.016 and E(c) = 1997 +/- 4 meV at T = 300 K.
Details
Title
Indirect-Energy-Gap Dependence on Al Concentration in Alxga1-Xas Alloys
Author(s)
Guzzi, M. ; Grilli, E. ; Oggioni, S. ; Staehli, J. L. ; Bosio, C. ; Pavesi, L.
Published in
Physical Review B
Volume
45
Issue
19
Pages
10951-10957
Date
1992
ISSN
0163-1829
Note
Ecole polytech fed lausanne,inst phys appl,ch-1015 lausanne,switzerland. univ pavia,dipartimento fis,i-27100 pavia,italy. univ trento,dipartimento fis,i-38050 trent,italy. Guzzi, m, univ milan,dipartimento fis,via celoria 16,i-20133 milan,italy.
ISI Document Delivery No.: HU799
Cited Reference Count: 36
Cited References:
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ISI Document Delivery No.: HU799
Cited Reference Count: 36
Cited References:
ASPNES DE, 1976, PHYS REV B, V14, P5331
BALDERESCHI A, 1977, J PHYS C SOLID STATE, V10, P4709
BEVINGTON PR, 1969, DATA REDUCTION ERROR
BIMBERG D, 1981, SOLID STATE COMMUN, V37, P987
BOSIO C, 1988, PHYS REV B, V38, P3263
CASEY HC, 1978, HETEROSTRUCTURE LA A
DINGLE R, 1977, I PHYS C SER A, V33, P210
DINGLE R, 1979, SOLID STATE COMMUN, V29, P171
GRILLI E, 1992, PHYS REV B, V45, P1638
GUZZI M, 1980, SOLID STATE PHENOMEN, V10, P25
HENNING JCM, 1986, J PHYS C SOLID STATE, V19, L335
HILL R, 1974, J PHYS C, V7, P521
HOPFIELD JJ, 1961, PHYS REV, V122, P35
HUMPHREYS RG, 1978, PHYS REV B, V18, P5590
KOPYLOV AA, 1977, SOV PHYS SEMICOND, V11, P510
KUECH TF, 1987, APPL PHYS LETT, V51, P505
LEE HJ, 1980, PHYS REV B, V21, P659
LIPARI NO, COMMUNICATION
LOGOTHETIDIS S, 1991, PHYS REV B, V43, P11950
LORENZ MR, 1970, SOLID STATE COMMUN, V8, P693
MADELUNG O, 1987, LANDOLTBORNSTEIN, V22
MIURA N, 1991, SOLID STATE COMMUN, V79, P1039
MONEMAR B, 1973, PHYS REV B, V8, P5711
MONEMAR B, 1976, J APPL PHYS, V47, P2604
NELSON JS, 1991, PHYS REV B, V43, P4908
OELGART G, UNPUB
OELGART G, 1987, SEMICOND SCI TECH, V2, P468
SAXENA AK, 1981, PHYS STATUS SOLIDI B, V105, P777
VANVECHTEN JA, 1970, PHYS REV B, V1, P3351
VANVECHTEN JA, 1970, PHYS REV B, V2, P2160
VARSHNI YP, 1967, PHYSICA, V34, P149
VINA L, 1984, PHYS REV B, V30, P1978
WEI SH, 1989, PHYS REV B, V39, P3279
WOLFORD DJ, 1979, J LUMIN, V18, P863
WOLFORD DJ, 1979, THESIS U ILLINOIS UR
WOLFORD DJ, 1985, SOLID STATE COMMUN, V53, P1069
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