VERTEX-CORRECTION-DRIVEN INTERSUBBAND SPIN-DENSITY EXCITONIC INSTABILITY IN DOUBLE-QUANTUM-WELL STRUCTURES

被引:45
作者
DASSARMA, S
TAMBORENEA, PI
机构
[1] Department of Physics, University of Maryland, College Park
关键词
D O I
10.1103/PhysRevLett.73.1971
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We show that exchange-correlation induced many-body excitonic vertex correction may lead to an instability in the normal ground state of a semiconductor double quantum well structure by suppressing the symmetric-antisymmetric intersubband gap at low but accessible (approximately 0.7 X 10(11) cm-2) electron densities. We predict as a consequence a novel electronic phase transition where the lowest intersubband spin-density-excitation gap vanishes giving rise to a new many-body triplet excitonic liquid ground state which is more stable at low densities than the usual two dimensional Fermi liquid phase.
引用
收藏
页码:1971 / 1974
页数:4
相关论文
共 34 条
[11]   ENERGY-SPECTRUM OF A LAYERED SYSTEM IN A STRONG MAGNETIC-FIELD [J].
FERTIG, HA .
PHYSICAL REVIEW B, 1989, 40 (02) :1087-1095
[12]   SPIN-DENSITY WAVES IN A QUASI-2-DIMENSIONAL ELECTRON-GAS [J].
GAMMON, D ;
SHANABROOK, BV ;
RYAN, JC ;
KATZER, DS .
PHYSICAL REVIEW B, 1990, 41 (17) :12311-12314
[13]   EXCHANGE AND CORRELATION IN THE NONHOMOGENEOUS ELECTRON-GAS IN SEMICONDUCTOR HETEROJUNCTIONS [J].
GAMMON, D ;
SHANABROOK, BV ;
RYAN, JC ;
KATZER, DS ;
YANG, MJ .
PHYSICAL REVIEW LETTERS, 1992, 68 (12) :1884-1887
[14]   THEORY OF THE HALF-FILLED LANDAU-LEVEL [J].
HALPERIN, BI ;
LEE, PA ;
READ, N .
PHYSICAL REVIEW B, 1993, 47 (12) :7312-7343
[15]   QUANTUM HALL-EFFECT IN DOUBLE-QUANTUM-WELL SYSTEMS [J].
HE, S ;
XIE, XC ;
DASSARMA, S ;
ZHANG, FC .
PHYSICAL REVIEW B, 1991, 43 (11) :9339-9342
[16]   QUANTIZED HALL-EFFECT AND QUANTUM PHASE-TRANSITIONS IN COUPLED 2-LAYER ELECTRON-SYSTEMS [J].
HE, S ;
DASSARMA, S ;
XIE, XC .
PHYSICAL REVIEW B, 1993, 47 (08) :4394-4412
[17]   ELEMENTARY ELECTRONIC EXCITATIONS IN A QUASI-2-DIMENSIONAL ELECTRON-GAS [J].
JAIN, JK ;
DASSARMA, S .
PHYSICAL REVIEW B, 1987, 36 (11) :5949-5952
[18]   ELEMENTARY COLLECTIVE EXCITATIONS IN MULTILAYERED TWO-DIMENSIONAL SYSTEMS [J].
JAIN, JK ;
DASSARMA, S .
SURFACE SCIENCE, 1988, 196 (1-3) :466-475
[20]   COLLAPSE OF INTEGER HALL GAPS IN A DOUBLE-QUANTUM-WELL SYSTEM [J].
MACDONALD, AH ;
PLATZMAN, PM ;
BOEBINGER, GS .
PHYSICAL REVIEW LETTERS, 1990, 65 (06) :775-778