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	Energy and effective mass of a polaron in asymmetric semiconductor quantum well structures
	Zhu, XQ; Shi, JJ; Liu, ZX; Pan, SH
刊名	Zeitschrift fur physik b-condensed matter
	1997-02-01
卷号	102期号:2页码:207-216
ISSN号	0722-3277
英文摘要	In this paper, the correct electron extended stales wave functions and the density of states in asymmetric single quantum wells (qws) are given for the first time, we put right mistakes from some previous papers of some other authors. within the framework of the second-order perturbation theory, the ground-state polaron binding energy and effective mass correction in asymmetric single qws are studied including the full energy specturm, i.e., the discrete energy levels in the well and the continuum energy spectrum above the barrier, and all possible optical-phonon modes. the effects of the finite electronic confinement potential and the subband nonparabolicity are considered. the relative importance of the different phonon modes is investigated. our results show that the polaron energy and effective mass are sensitive to the asymmetry of the structure and have a close relation to the interface phonon dispersion. when well width and one side barrier height of asymmetric qws are fixed and identical with those of symmetric qw, the polaron binding energy and effective mass in asymmetric qws are always less than those in symmetric qw. it is necessary to include the continuum energy spectrum as intermediate states in the study of polaron effects in qws in order to obtain the correct results. the subband non-parabolicity has little influence on the polaron effects. the polaron energies given in this paper are excellent agreement with our variational results.
WOS关键词	ELECTRON-PHONON INTERACTION ; INTERFACE-PHONON ; MAGNETIC-FIELD ; GAAS/ALAS SUPERLATTICES ; CYCLOTRON-RESONANCE ; DIELECTRIC SLAB ; BOUND POLARON ; CRYSTAL SLAB ; SELF-ENERGY ; MODES
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
语种	英语
出版者	SPRINGER
WOS记录号	WOS:A1997WF43400008
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2373780
专题	物理研究所
作者单位	1.CHINESE CTR ADV SCI & TECHNOL, WORLD LAB, BEIJING 100080, PEOPLES R CHINA 2.ACAD SINICA, INST PHYS, BEIJING 100080, PEOPLES R CHINA
推荐引用方式 GB/T 7714	Zhu, XQ,Shi, JJ,Liu, ZX,et al. Energy and effective mass of a polaron in asymmetric semiconductor quantum well structures[J]. Zeitschrift fur physik b-condensed matter,1997,102(2):207-216.
APA	Zhu, XQ,Shi, JJ,Liu, ZX,&Pan, SH.(1997).Energy and effective mass of a polaron in asymmetric semiconductor quantum well structures.Zeitschrift fur physik b-condensed matter,102(2),207-216.
MLA	Zhu, XQ,et al."Energy and effective mass of a polaron in asymmetric semiconductor quantum well structures".Zeitschrift fur physik b-condensed matter 102.2(1997):207-216.

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