MAGNETIC STATES IN SELECTIVELY DOPED QUANTUM WELL HETEROSTRUCTURES

被引：1

作者：

BANDARA, KMSV

COON, DD

BYUNGSUNG, O

机构：

[1] Applied Technology Laboratory Department, Physics University of Pittsburgh, Pittsburgh

来源：

SUPERLATTICES AND MICROSTRUCTURES | 1990年 / 7卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0749-6036(90)90114-M

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Exchange interactions between electrons localized in selectively doped, electrically neutral, planar quantum well heterostructures are shown to lead to a characteristic sheet density below which the conventional picture of a paramagnetic two-dimensional electron gas ground state may be inapplicable, especially at low temperatures. First order Hartree-Fock approximation estimates indicate that critical sheet densities for a possible magnetic transition may lie in a readily achievable experimental range of order 6 × 1010 cm-2 for 40 Å AlGaAs GaAs quantum wells. Relevant experiments are suggested. © 1990.

引用

收藏

页码：51 / 55

页数：5

相关论文

共 18 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]

Bandara K. M., 1989, APPL PHYS LETT, V55, P206

[3] BAND OFFSETS, FERMI LEVELS AND IMPURITY BANDS IN DOPED CONTACT LAYERS [J].

BANDARA, KMSV ;

COON, DD .

SUPERLATTICES AND MICROSTRUCTURES, 1988, 4 (06) :705-707

[4] EXCHANGE INTERACTIONS IN QUANTUM WELL SUBBANDS [J].

BANDARA, KMSV ;

COON, DD ;

O, BS ;

LIN, YF ;

FRANCOMBE, MH .

APPLIED PHYSICS LETTERS, 1988, 53 (20) :1931-1933

[5] ELECTRON-ELECTRON INTERACTIONS AND RESONANT TUNNELING IN HETEROSTRUCTURES [J].

BANDARA, KMSV ;

COON, DD .

APPLIED PHYSICS LETTERS, 1988, 53 (19) :1865-1867

[6] HYSTERESIS PREDICTED IN IV CURVE OF HETEROJUNCTION RESONANT TUNNELING DIODES SIMULATED BY A SELF-CONSISTENT QUANTUM METHOD [J].

BERKOWITZ, HL ;

LUX, RA .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 1987, 5 (04) :967-970

[7] SELF-CONSISTENT ANALYSIS OF RESONANT TUNNELING IN A 2-BARRIER-ONE-WELL MICROSTRUCTURE [J].

BRENNAN, KF .

JOURNAL OF APPLIED PHYSICS, 1987, 62 (06) :2392-2400

[8] IMPORTANCE OF SPACE-CHARGE EFFECTS IN RESONANT TUNNELING DEVICES [J].

CAHAY, M ;

MCLENNAN, M ;

DATTA, S ;

LUNDSTROM, MS .

APPLIED PHYSICS LETTERS, 1987, 50 (10) :612-614

[9] PERIODIC NEGATIVE CONDUCTANCE BY SEQUENTIAL RESONANT TUNNELING THROUGH AN EXPANDING HIGH-FIELD SUPERLATTICE DOMAIN [J].

CHOI, KK ;

LEVINE, BF ;

MALIK, RJ ;

WALKER, J ;

BETHEA, CG .

PHYSICAL REVIEW B, 1987, 35 (08) :4172-4175

[10]

Herring C., 1966, MAGNETISM, V4