MODEL FOR LONGITUDINAL-OPTICAL PHONONS AND ELECTRON-PHONON COUPLING IN GAAS-GA1-XALXAS MULTILAYER STRUCTURES

被引:15
作者
GUILLEMOT, C
CLEROT, F
机构
[1] Centre National d'Etudes des Télécommunications
来源
PHYSICAL REVIEW B | 1991年 / 44卷 / 12期
关键词
D O I
10.1103/PhysRevB.44.6249
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A continuum theory is developed to investigate the properties of the long-wavelength longitudinal-optical phonons in GaAs-Ga1-xAlxAs multilayer structures and the associated electron-phonon interaction. Depending on the layer, the relative ionic displacements are related to GaAs or GaAs-type longitudinal-optical phonons and treated in the framework of the Born-Huang model, generalized to include isotropic dispersion effects in the Brillouin-zone center. For double heterostructures, a finite number of quantized confined modes is found. The interplay between the long-range Coulomb interaction, which couples the vibrations of adjacent GaAs layers, and confinement effects, which prevent the displacements of adjacent GaAs layers to overlap, is elucidated in the case of superlattices. The strength of the electron-phonon coupling in double heterostructures is reduced as compared with the electron-bulk-phonon effective coupling strength for quantum-well widths smaller than 100 angstrom.
引用
收藏
页码:6249 / 6261
页数:13
相关论文
共 38 条
[11]   INTERFACE ROUGHNESS AND THE DISPERSION OF CONFINED LO PHONONS IN GAAS/ALAS QUANTUM WELLS [J].
FASOL, G ;
TANAKA, M ;
SAKAKI, H ;
HORIKOSHI, Y .
PHYSICAL REVIEW B, 1988, 38 (09) :6056-6065
[12]   CALCULATED SUPERLATTICE AND INTERFACE PHONONS OF INAS/GASB SUPERLATTICES [J].
FASOLINO, A ;
MOLINARI, E ;
MAAN, JC .
PHYSICAL REVIEW B, 1986, 33 (12) :8889-8891
[13]   RESONANT QUASICONFINED OPTICAL PHONONS IN SEMICONDUCTOR SUPERLATTICES [J].
FASOLINO, A ;
MOLINARI, E ;
MAAN, JC .
PHYSICAL REVIEW B, 1989, 39 (06) :3923-3926
[14]  
FUCHS R, 1965, PHYS REV, V140, P2076
[15]   HIGH-FIELD TRANSPORT IN GAAS/GAALAS MULTIQUANTUM WELLS - THEORY AND EXPERIMENT [J].
GUILLEMOT, C ;
CLEROT, F ;
AUVRAY, P ;
BAUDET, M ;
GAUNEAU, M ;
REGRENY, A .
SUPERLATTICES AND MICROSTRUCTURES, 1990, 8 (03) :259-262
[16]  
HAKEN H, 1976, QUANTUM FIELD THEORY
[17]   DIELECTRIC CONTINUUM MODEL AND FROHLICH INTERACTION IN SUPERLATTICES [J].
HUANG, K ;
ZHU, BF .
PHYSICAL REVIEW B, 1988, 38 (18) :13377-13386
[18]   LONG-WAVELENGTH OPTIC VIBRATIONS IN A SUPERLATTICE [J].
HUANG, K ;
ZHU, BF .
PHYSICAL REVIEW B, 1988, 38 (03) :2183-2186
[19]   DISPERSIVE CHARACTER OF OPTICAL PHONONS IN GAALAS ALLOYS FROM RAMAN-SCATTERING IN SUPERLATTICES [J].
JUSSERAND, B ;
PAQUET, D ;
MOLLOT, F .
PHYSICAL REVIEW LETTERS, 1989, 63 (21) :2397-2400
[20]   RESONANCE RAMAN-SCATTERING BY CONFINED LO AND TO PHONONS IN GAAS-ALAS SUPERLATTICES - COMMENT [J].
JUSSERAND, B ;
PAQUET, D .
PHYSICAL REVIEW LETTERS, 1986, 56 (16) :1752-1752