RESONANCE-INDUCED DELOCALIZATION OF ELECTRONS IN GAAS-ALAS SUPERLATTICES

被引：109

作者：

SCHNEIDER, H ^{[1
]}

GRAHN, HT ^{[1
]}

VONKLITZING, K ^{[1
]}

PLOOG, K ^{[1
]}

机构：

[1] MAX PLANCK INST FESTKORPERFORSCH,W-7000 STUTTGART 80,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 65卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.65.2720

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on novel interaction phenomena between different Stark ladders in a strongly coupled GaAs-AlAs superlattice. We observe an anticrossing behavior between certain exciton states if the electric field perpendicular to the layers of the superlattice is such that the energy spacing between the lowest two conduction subbands is an integer multiple of the Stark-ladder spacing. This anticrossing is accompanied by a spatial delocalization of the electron states and can therefore be resolved by photocurrent spectroscopy. Our experimental results are confirmed by a numerical calculation of the field dependence of the conduction-subband energies. © 1990 The American Physical Society.

引用

页码：2720 / 2723

页数：4

共 18 条

[1] COHERENCE AND LOCALIZATION IN SUPERLATTICES UNDER ELECTRIC-FIELDS [J].

AGULLORUEDA, F ;

MENDEZ, EE ;

BRUM, JA ;

HONG, JM .

SURFACE SCIENCE, 1990, 228 (1-3) :80-83

[2] THEORETICAL INVESTIGATIONS OF SUPER-LATTICE BAND-STRUCTURE IN THE ENVELOPE-FUNCTION APPROXIMATION [J].

BASTARD, G .

PHYSICAL REVIEW B, 1982, 25 (12) :7584-7597

[3] ELECTRIC-FIELD INDUCED LOCALIZATION AND OSCILLATORY ELECTRO-OPTICAL PROPERTIES OF SEMICONDUCTOR SUPERLATTICES [J].

BLEUSE, J ;

BASTARD, G ;

VOISIN, P .

PHYSICAL REVIEW LETTERS, 1988, 60 (03) :220-223

[4] OPTICAL EVIDENCE OF THE DIRECT-TO-INDIRECT-GAP TRANSITION IN GAAS-ALAS SHORT-PERIOD SUPERLATTICES [J].

DANAN, G ;

ETIENNE, B ;

MOLLOT, F ;

PLANEL, R ;

JEANLOUIS, AM ;

ALEXANDRE, F ;

JUSSERAND, B ;

LEROUX, G ;

MARZIN, JY ;

SAVARY, H ;

SERMAGE, B .

PHYSICAL REVIEW B, 1987, 35 (12) :6207-6212

[5] DIRECT OBSERVATION OF SUPERLATTICE FORMATION IN A SEMICONDUCTOR HETEROSTRUCTURE [J].

DINGLE, R ;

GOSSARD, AC ;

WIEGMANN, W .

PHYSICAL REVIEW LETTERS, 1975, 34 (21) :1327-1330

[6] OPTICAL-DETECTION OF HIGH-FIELD DOMAINS IN GAAS ALAS SUPERLATTICES [J].

GRAHN, HT ;

SCHNEIDER, H ;

VONKLITZING, K .

APPLIED PHYSICS LETTERS, 1989, 54 (18) :1757-1759

[7] STARK-WANNIER STATES AND STARK LADDERS IN SEMICONDUCTOR SUPERLATTICES [J].

LEO, J ;

MACKINNON, A .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1989, 1 (08) :1449-1466

[8] RESONANTLY ENHANCED ELECTRON-TUNNELING RATES IN QUANTUM WELLS [J].

LIVESCU, G ;

FOX, AM ;

MILLER, DAB ;

SIZER, T ;

KNOX, WH ;

GOSSARD, AC ;

ENGLISH, JH .

PHYSICAL REVIEW LETTERS, 1989, 63 (04) :438-441

[9] STARK LOCALIZATION IN GAAS-GAALAS SUPERLATTICES UNDER AN ELECTRIC-FIELD [J].

MENDEZ, EE ;

AGULLORUEDA, F ;

HONG, JM .

PHYSICAL REVIEW LETTERS, 1988, 60 (23) :2426-2429

[10] BAND-EDGE ELECTROABSORPTION IN QUANTUM WELL STRUCTURES - THE QUANTUM-CONFINED STARK-EFFECT [J].

MILLER, DAB ;

CHEMLA, DS ;

DAMEN, TC ;

GOSSARD, AC ;

WIEGMANN, W ;

WOOD, TH ;

BURRUS, CA .

PHYSICAL REVIEW LETTERS, 1984, 53 (22) :2173-2176

← 1 2 →