Evolution of energy levels of a GaAs/AlGaAs superlattice under the influence of a strong magnetic field

被引：5

作者：

Bauer, T

Hummel, AB

Roskos, HG

Köhler, K

机构：

[1] Goethe Univ Frankfurt, Inst Phys, D-60525 Frankfurt, Germany

[2] Fraunhofer Inst Appl Solid State Phys, D-79108 Freiburg, Germany

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2000年 / 7卷 / 1-2期

关键词：

superlattices; magnetic field; Wannier-Stark ladder; Landau quantization;

D O I：

10.1016/S1386-9477(99)00313-6

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We present photocurrent spectra of the Wannier-Stark ladder of a GaAs/AlGaAs superlattice in a magnetic field up to 9 T and oriented along the growth direction of the superlattice. The Landau and Wannier-Stark quantization directions are perpendicular to each other. The salient observation is the evolution of Landau fans for the different Wannier-Stark transitions, with the Landau fan assigned to the spatially direct Wannier-Stark ladder transitions being very pronounced quite in contrast to the Landau fans for the spatially indirect Wannier-Stark transitions which are weak. (C) 2000 Elsevier Science B.V. All rights reserved.

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收藏

页码：289 / 293

页数：5

相关论文

共 25 条

[1] QUANTUM COHERENCE IN SEMICONDUCTOR SUPERLATTICES [J].

AGULLORUEDA, F ;

MENDEZ, EE ;

HONG, JM .

PHYSICAL REVIEW B, 1989, 40 (02) :1357-1360

[2] INTERBAND OPTICAL TRANSITIONS IN EXTREMELY ANISOTROPIC SEMICONDUCTORS .2. COEXISTENCE OF EXCITON AND LANDAU LEVELS [J].

AKIMOTO, O ;

HASEGAWA, H .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1967, 22 (01) :181-&

[3] Excitonic emission of THz radiation: Experimental evidence of the shortcomings of the Bloch equation method [J].

Bolivar, PH ;

Wolter, F ;

Muller, A ;

Roskos, HG ;

Kurz, H ;

Kohler, K .

PHYSICAL REVIEW LETTERS, 1997, 78 (11) :2232-2235

[4] LINE-SHAPE THEORY OF MAGNETOABSORPTION IN SEMICONDUCTOR SUPERLATTICES [J].

CHU, HY ;

CHANG, YC .

PHYSICAL REVIEW B, 1989, 40 (08) :5497-5506

[5] COHERENT EXCITATIONS IN THE STARK LADDER - EXCITONIC BLOCH OSCILLATIONS [J].

DIGNAM, M ;

SIPE, JE ;

SHAH, J .

PHYSICAL REVIEW B, 1994, 49 (15) :10502-10513

[6] Intrawell and interwell magnetoexcitons in InxGa1-xAs/GaAs coupled double quantum wells [J].

Dzyubenko, AB ;

Yablonskii, AL .

PHYSICAL REVIEW B, 1996, 53 (24) :16355-16364

[7] OPTICAL INVESTIGATION OF BLOCH OSCILLATIONS IN A SEMICONDUCTOR SUPERLATTICE [J].

FELDMANN, J ;

LEO, K ;

SHAH, J ;

MILLER, DAB ;

CUNNINGHAM, JE ;

MEIER, T ;

VONPLESSEN, G ;

SCHULZE, A ;

THOMAS, P ;

SCHMITTRINK, S .

PHYSICAL REVIEW B, 1992, 46 (11) :7252-7255

[8] DIRECT OBSERVATION OF MINIBAND-EDGE SINGULARITIES IN THE OPTICAL-SPECTRA OF GAAS/ALAS SUPERLATTICES [J].

FUJIWARA, K ;

KAWASHIMA, K ;

YAMAMOTO, T ;

SANO, N ;

CINGOLANI, R ;

GRAHN, HT ;

PLOOG, K .

PHYSICAL REVIEW B, 1994, 49 (03) :1809-1812

[9] Numerical calculation of the optical absorption in semiconductor quantum structures [J].

Glutsch, S ;

Chemla, DS ;

Bechstedt, F .

PHYSICAL REVIEW B, 1996, 54 (16) :11592-11601

[10] ZENER TUNNELING IN SEMICONDUCTORS [J].

KANE, EO .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1959, 12 (02) :181-188