OBSERVATION OF MAGNETIC EXCITONS AND SPIN-WAVES IN ACTIVATION STUDIES OF A 2-DIMENSIONAL ELECTRON-GAS

被引：176

作者：

USHER, A

NICHOLAS, RJ

HARRIS, JJ

FOXON, CT

机构：

[1] UNIV OXFORD,CLARENDON LAB,OXFORD OX1 3PU,ENGLAND

[2] PHILIPS RES LABS,REDHILL RH1 5HA,SURREY,ENGLAND

来源：

PHYSICAL REVIEW B | 1990年 / 41卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.41.1129

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Measurements of activated conductivity for well-resolved Landau levels at filling factors v=1, 2, and 3 reveal a large exchange contribution to the energy gap, both at v=1 and 3 (the familiar exchange-enhanced g factor) and for the first time demonstrate a similar contribution at v=2. These results provide a measure of the large-wave-vector limits of the spin-wave and magnetic-exciton dispersion relations. The surprisingly strong magnetic field dependences of the measured energies are caused by the disorder present in the system. © 1990 The American Physical Society.

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页码：1129 / 1134

页数：6

相关论文

共 33 条

[1] THEORY OF OSCILLATORY G-FACTOR IN AN MOS INVERSION LAYER UNDER STRONG MAGNETIC-FIELDS [J].

ANDO, T ;

UEMURA, Y .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1974, 37 (04) :1044-1052

[2] THEORY OF QUANTUM TRANSPORT IN A 2-DIMENSIONAL ELECTRON-SYSTEM UNDER MAGNETIC-FIELDS .3. MANY-SITE APPROXIMATION [J].

ANDO, T .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1974, 37 (03) :622-630

[3] EXPERIMENTAL-DETERMINATION OF FRACTIONAL CHARGE E/Q FOR QUASIPARTICLE EXCITATIONS IN THE FRACTIONAL QUANTUM HALL-EFFECT [J].

CLARK, RG ;

MALLETT, JR ;

HAYNES, SR ;

HARRIS, JJ ;

FOXON, CT .

PHYSICAL REVIEW LETTERS, 1988, 60 (17) :1747-1750

[4] ELECTRON-SPIN RESONANCE IN THE TWO-DIMENSIONAL ELECTRON-GAS OF GAAS-ALXGA1-XAS HETEROSTRUCTURES [J].

DOBERS, M ;

VONKLITZING, K ;

WEIMANN, G .

PHYSICAL REVIEW B, 1988, 38 (08) :5453-5456

[5] HOPPING CONDUCTION IN THE LANDAU-LEVEL TAILS IN GAAS-ALXGA1-XAS HETEROSTRUCTURES AT LOW-TEMPERATURES [J].

EBERT, G ;

VONKLITZING, K ;

PROBST, C ;

SCHUBERTH, E ;

PLOOG, K ;

WEIMANN, G .

SOLID STATE COMMUNICATIONS, 1983, 45 (07) :625-628

[6] DENSITY OF STATES AND DEHAAS-VANALPHEN EFFECT IN TWO-DIMENSIONAL ELECTRON-SYSTEMS [J].

EISENSTEIN, JP ;

STORMER, HL ;

NARAYANAMURTI, V ;

CHO, AY ;

GOSSARD, AC ;

TU, CW .

PHYSICAL REVIEW LETTERS, 1985, 55 (08) :875-878

[7] OBSERVATION OF OSCILLATORY LINEWIDTH IN THE CYCLOTRON-RESONANCE OF GAAS-ALXGA1-XAS HETEROSTRUCTURES [J].

ENGLERT, T ;

MAAN, JC ;

UIHLEIN, C ;

TSUI, DC ;

GOSSARD, AC .

SOLID STATE COMMUNICATIONS, 1983, 46 (07) :545-548

[8]

GAVRILOV MG, 1986, JETP LETT+, V43, P103

[9] STATISTICAL-MODEL FOR INHOMOGENEITIES IN A TWO-DIMENSIONAL ELECTRON-GAS IMPLYING A BACKGROUND DENSITY OF STATES BETWEEN LANDAU-LEVELS [J].

GERHARDTS, RR ;

GUDMUNDSSON, V .

PHYSICAL REVIEW B, 1986, 34 (04) :2999-3003

[10] SPECIFIC-HEAT OF TWO-DIMENSIONAL ELECTRONS IN GAAS-GAALAS MULTILAYERS [J].

GORNIK, E ;

LASSNIG, R ;

STRASSER, G ;

STORMER, HL ;

GOSSARD, AC ;

WIEGMANN, W .

PHYSICAL REVIEW LETTERS, 1985, 54 (16) :1820-1823

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