INFLUENCE OF MAGNETIC-FIELDS ON AN EXTREMELY NARROW EXCITON LINE IN A HIGH-CARRIER-DENSITY HETEROJUNCTION

被引：9

作者：

DRIESSEN, FAJM ^{[1
]}

OLSTHOORN, SM ^{[1
]}

BERENDSCHOT, TTJM ^{[1
]}

PEN, HF ^{[1
]}

GILING, LJ ^{[1
]}

JONES, GAC ^{[1
]}

RITCHIE, DA ^{[1
]}

FROST, JEF ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,CAVENDISH LAB,CAMBRIDGE CB3 0HE,ENGLAND

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.45.11823

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-resolution magnetophotoluminescence measurements are reported on a GaAs-AlxGa1-xAs heterojunction that has two occupied subbands at zero magnetic field. A very efficient, extremely narrow-band luminescence involving the two-dimensional electron gas is observed above a certain critical field strength in spite of the large built-in electric field acting on the photoexcited holes. The photoluminescence peak shows pronounced magneto-oscillations in peak energy, as well as in luminescence intensity and peak width. The luminescence is attributed to the exciton of the second subband, which hybridizes with the Landau level of the first subband in which the Fermi level resides. This many-body interaction is most efficient at odd filling factors, i.e., if the Fermi level lies in the extended states. The oscillations in photon energy and full width at half maximum originate from n(c) = 1 Landau-level crossings with the lowest n(c) = 2 Landau level. The optical data show that the exciton of the second subband is consecutively populated and depopulated. Tilted-field measurements enable the determination of the intrasubband diamagnetic shift in a parallel field delta-E12/delta-B.

引用

页码：11823 / 11828

页数：6

共 31 条

[1] ELECTRONIC-PROPERTIES OF TWO-DIMENSIONAL SYSTEMS [J].

ANDO, T ;

FOWLER, AB ;

STERN, F .

REVIEWS OF MODERN PHYSICS, 1982, 54 (02) :437-672

[2] NOVEL MAGNETOOPTICAL BEHAVIOR IN THE WIGNER-SOLID REGIME [J].

BUHMANN, H ;

JOSS, W ;

VONKLITZING, K ;

KUKUSHKIN, IV ;

PLAUT, AS ;

MARTINEZ, G ;

PLOOG, K ;

TIMOFEEV, VB .

PHYSICAL REVIEW LETTERS, 1991, 66 (07) :926-929

[3] INTERACTION OF MAGNETOEXCITONS AND 2-DIMENSIONAL ELECTRON-GAS IN THE QUANTUM HALL REGIME [J].

CHEN, W ;

FRITZE, M ;

NURMIKKO, AV ;

ACKLEY, D ;

COLVARD, C ;

LEE, H .

PHYSICAL REVIEW LETTERS, 1990, 64 (20) :2434-2437

[4] FERMI-EDGE SINGULARITIES AND ENHANCED MAGNETOEXCITONS IN THE OPTICAL-SPECTRA OF GAAS/(GA,AL)AS SINGLE QUANTUM-WELLS [J].

CHEN, W ;

FRITZE, M ;

NURMIKKO, AV ;

HONG, M ;

CHANG, LL .

PHYSICAL REVIEW B, 1991, 43 (18) :14738-14741

[5] QUANTUM SIZE EFFECT IN MONOLAYER-DOPED HETEROSTRUCTURES [J].

CUNNINGHAM, JE ;

TSANG, WT ;

TIMP, G ;

SCHUBERT, EF ;

CHANG, AM ;

OWUSUSEKYERE, K .

PHYSICAL REVIEW B, 1988, 37 (08) :4317-4320

[6] PERSISTENT PHOTOCONDUCTIVITY AND 2-BAND EFFECTS IN GAAS/ALXGA1-XAS HETEROJUNCTIONS [J].

FLETCHER, R ;

ZAREMBA, E ;

DIORIO, M ;

FOXON, CT ;

HARRIS, JJ .

PHYSICAL REVIEW B, 1990, 41 (15) :10649-10666

[7]

FRITZE M, 1990, 20TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS, VOLS 1-3, P825

[8] WAVELENGTH-DEPENDENT PHOTOCONDUCTION EFFECTS ON THE 2ND SUBBAND OCCUPANCY IN (AL, GA)AS/GAAS HETEROJUNCTIONS [J].

HARRIS, JJ ;

LACKLISON, DE ;

FOXON, CT ;

SELTEN, FM ;

SUCKLING, AM ;

NICHOLAS, RJ ;

BARNHAM, KWJ .

SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 1987, 2 (12) :783-789

[9] OPTICAL ANOMALIES OF THE TWO-DIMENSIONAL ELECTRON-GAS IN THE EXTREME MAGNETIC QUANTUM LIMIT [J].

HEIMAN, D ;

GOLDBERG, BB ;

PINCZUK, A ;

TU, CW ;

GOSSARD, AC ;

ENGLISH, JH .

PHYSICAL REVIEW LETTERS, 1988, 61 (05) :605-608

[10] CYCLOTRON-RESONANCE AND SCREENING EFFECTS IN GAAS-GAALAS HETEROJUNCTIONS [J].

HOPKINS, MA ;

NICHOLAS, RJ ;

BRUMMELL, MA ;

HARRIS, JJ ;

FOXON, CT .

SUPERLATTICES AND MICROSTRUCTURES, 1986, 2 (04) :319-322

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