๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Electrons and excitons in an imperfect superlattice in electric fields

โœ Scribed by S.M. Cao; M. Willander; E.L. Ivchenko; A.I. Nesvizhskii; A.A. Toropov

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
314 KB
Volume
17
Category
Article
ISSN
0749-6036

No coin nor oath required. For personal study only.

โœฆ Synopsis

We present variational calculations of excitonic states in a superlattice coupled with a wide quantum well in electric fields. The electronic states in the structure are analyzed by using both exact solutions of the one-dimensional Schrรถdinger equation and the simple tight-binding approximation. We demonstrate the latter method to be well applicable to calculating and designing complicated irregular superlattices. The electron spectrum can be conveniently interpreted as a result of field-induced mixing and anticrossing of electron quantized states in the enlarged quantum well with non-equidistant Stark-ladder states in the semi-infinite ideal superlattice. The electron-hole Coulomb attraction results in a relative redistribution between the extended and the localized states in the exciton. The allowance for this redistribution has a particularly strong influence upon the exciton oscillator strength and radiative lifetime.

๐Ÿ“œ SIMILAR VOLUMES

Impact Ionization of Excitons in an Elec
Impact Ionization of Excitons in an Electric Field in GaN
โœ D.K. Nelson; M.A. Jacobson; V.D. Kagan; M. Shmidt; B. Gil; N. Grandjean; J. Mass ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 139 KB ๐Ÿ‘ 2 views
Spin-Dependent Excitonโ€“Exciton Interacti
Spin-Dependent Excitonโ€“Exciton Interaction in Quantum Wells under an Electric Field
โœ G. Aichmayr; M. Jetter; L. Viรฑa; J. Dickerson; F. Camino; E. E. Mendez ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 174 KB ๐Ÿ‘ 2 views

We give conclusive experimental evidence that spin-dependent excitonยฑexciton interaction processes can be altered by directly modifying the spatial exciton structure applying an electric field. The previously observed energy splitting in spin-polarized, dense exciton gases can be varied by the elect

An exciton in a quantum well in the pres
An exciton in a quantum well in the presence of crossed electric and magnetic fields
โœ B.S. Monozon; P. Schmelcher ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 175 KB

An analytical approach to the problem of the Wannier-Mott exciton in a semiconductor quantum well (QW) in the presence of external magnetic and electric fields is developed. The magnetic field is taken to lie in the heteroplanes while the electric field is directed perpendicular to the heteroplanes.