The role of randomly distributed well widths in disordered GaAs/AlGaAs superlattices
Numerical and experimental results on the effect of randomness in GaAs/Al0.3Ga0.7As superlattices having a small number of randomly distributed well widths are reported. The numerical results indicate the splitting of the extended state miniband into sub-minibands of localized states having a disorder-induced fine structure. The comparison between the experimental results for low-temperature absorption spectra and the computed joint density of states of the investigated samples confirms the predicted features. The high-temperature photoluminescence intensity of random superlattices is observed to be enhanced with respect to the ordered case.
WOS:A1996TZ79700005
1996
11
3
308
314
Univ bari,dipartmento fis,i-70126 bari,italy. ist nazl fis mat,i-70126 bari,italy. univ geneva,appl phys grp,ch-1211 geneva 4,switzerland. ecole polytech fed lausanne,inst micro & optoelectr,ch-1015 lausanne,switzerland. ecole polytech fed lausanne,inst genie atom,ch-1015 lausanne,switzerland. Lorusso, GF, ECOLE POLYTECH FED LAUSANNE,INST PHYS APPL,CH-1015 LAUSANNE,SWITZERLAND.
ISI Document Delivery No.: TZ797
Cited Reference Count: 28
Cited References:
ANDERSON PW, 1958, PHYS REV, V109, P1492
ANDREANI LC, 1990, PHYS REV B, V42, P8928
BOSIO C, 1988, PHYS REV B, V38, P3263
CAPOZZI V, 1991, I PHYS C SER, V123, P195
CHEN XS, 1993, PHYS REV B, V47, P7146
CHEN XS, 1993, PHYS REV B, V48, P5273
CHOMETTE A, 1986, PHYS REV LETT, V57, P1464
CHRISTEN J, 1984, APPL PHYS LETT, V44, P84
CRISANTI A, 1989, J PHYS-CONDENS MAT, V1, P9509
DASSARMA S, 1986, PHYS REV LETT, V56, P1280
DOW J, 1982, PHYS REV B, V25, P6218
FORNEY JJ, 1977, J PHYS C SOLID STATE, V10, P1887
GUBERNATIS JE, 1973, J PHYS C SOLID STATE, V6, P1889
GUZZI M, 1989, SOLID STATE PHENOM, V10, P22
HALPERIN BI, 1967, ADV CHEM PHYS, V13, P123
KOHMOTO M, 1986, PHYS REV B, V34, P5043
LEE PA, 1985, REV MOD PHYS, V57, P287
LEPORE JJ, 1980, J APPL PHYS, V51, P6441
MADER KA, 1995, PHYS REV LETT, V74, P13
OSTLUND S, 1984, PHYS REV B, V29, P1394
PAVESI L, 1989, PHYS REV B, V39, P7788
PAVESI L, 1990, PHYS REV B, V42, P11362
PAVESI L, 1990, PHYS STATUS SOLIDI B, V157, P615
SASAKI A, 1994, APPL PHYS LETT, V64, P2016
SU WP, 1992, J APPL PHYS, V72, P2080
TUNCEL E, 1988, PHYS REV B, V38, P1597
YAMAMOTO T, 1990, J APPL PHYS, V68, P5318
YU J, 1984, J APPL PHYS, V56, P1895
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