SPECTROSCOPIC MEASUREMENT OF LARGE EXCHANGE ENHANCEMENT OF A SPIN-POLARIZED 2D ELECTRON-GAS

被引：115
作者：
PINCZUK, A
DENNIS, BS
HEIMAN, D
KALLIN, C
BREY, L
TEJEDOR, C
SCHMITTRINK, S
PFEIFFER, LN
WEST, KW
机构：
[1] MIT,NATL MAGNET LAB,CAMBRIDGE,MA 02139
[2] MCMASTER UNIV,DEPT PHYS,HAMILTON L8S 4M1,ONTARIO,CANADA
[3] UNIV AUTONOMA MADRID,FAC CIENCIAS,DEPT FIS MAT CONDENSADA C-X11,E-28099 MADRID,SPAIN
[4] UNIV MARBURG,DEPT PHYS & MAT SCI CTR,W-3550 MARBURG,GERMANY
来源：
PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 24期
关键词：
D O I：
10.1103/PhysRevLett.68.3623
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Exchange enhancements of the spin-polarized 2D electron gas are determined for the first time by inelastic light scattering from spin-flip inter-Landau-level and intersubband excitations. In the magnetic quantum limit nu = 1 the splitting between long wavelength magnetoplasmons and spin-flip inter-Landau-level excitations is a direct spectroscopic measurement of the enhanced exchange energy. At nu = 1 the enhancements in GaAs quantum wells are in agreement with the Hartree-Fock approximation.
引用
收藏
页码：3623 / 3626
页数：4
相关论文
共 30 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]   ENERGY-SPECTRUM AND CHARGE-DENSITY-WAVE INSTABILITY OF A DOUBLE QUANTUM-WELL IN A MAGNETIC-FIELD [J].
BREY, L .
PHYSICAL REVIEW LETTERS, 1990, 65 (07) :903-906
[3]   ENERGY-SPECTRUM OF ELECTRONS IN A PARABOLIC QUANTUM-WELL IN A STRONG MAGNETIC-FIELD [J].
BREY, L .
PHYSICAL REVIEW B, 1991, 44 (08) :3772-3781
[4]  
Chakraborty T., 1988, FRACTIONAL QUANTUM H
[5]   G-FACTOR ENHANCEMENT IN THE 2D ELECTRON-GAS IN GAAS/ALGAAS HETEROJUNCTIONS [J].
ENGLERT, T ;
TSUI, DC ;
GOSSARD, AC ;
UIHLEIN, C .
SURFACE SCIENCE, 1982, 113 (1-3) :295-300
[6]   EFFECTS OF A TILTED MAGNETIC FIELD ON A 2-DIMENSIONAL ELECTRON GAS [J].
FANG, FF ;
STILES, PJ .
PHYSICAL REVIEW, 1968, 174 (03) :823-&
[7]   COLLECTIVE-EXCITATION GAP IN THE FRACTIONAL QUANTUM HALL-EFFECT [J].
GIRVIN, SM ;
MACDONALD, AH ;
PLATZMAN, PM .
PHYSICAL REVIEW LETTERS, 1985, 54 (06) :581-583
[8]   EXCHANGE ENHANCEMENT OF A SPIN-POLARIZED 2D ELECTRON-GAS DETERMINED BY OPTICAL-ABSORPTION SPECTROSCOPY [J].
GOLDBERG, BB ;
HEIMAN, D ;
PINCZUK, A .
PHYSICAL REVIEW LETTERS, 1989, 63 (10) :1102-1105
[9]   INELASTIC LIGHT-SCATTERING IN THE FRACTIONAL QUANTUM HALL REGIME - COLLAPSE OF THE INTERSUBBAND ENERGY [J].
HEIMAN, D ;
PINCZUK, A ;
DENNIS, BS ;
PFEIFFER, LN ;
WEST, KW .
PHYSICAL REVIEW B, 1992, 45 (03) :1492-1495
[10]   EXCITATIONS FROM A FILLED LANDAU-LEVEL IN THE TWO-DIMENSIONAL ELECTRON-GAS [J].
KALLIN, C ;
HALPERIN, BI .
PHYSICAL REVIEW B, 1984, 30 (10) :5655-5668
123