Selective control of electrons in quantum wires formed by highly uniform multiatomic step arrays on GaAs(331) substrates

被引：10

作者：

Friedland, KJ ^{[1
]}

Schönherr, HP ^{[1
]}

Nötzel, R ^{[1
]}

Ploog, KH ^{[1
]}

机构：

[1] Paul Drude Inst Festkorperelekt, D-10117 Berlin, Germany

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.83.156

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Coherently aligned, multiatomic step arrays on GaAs(331) substrates generate a periodic array of conductive quantum wires in a two-dimensional (2D) electron gas. A small number of wires is selected by superimposing a constriction with independent side-gate control. By tuning the gate-voltage window, wires can be selected one by one. The resulting oscillatory current transmission provides a new functionality by switching between spatially separated electron channels. The wires are coupled by a small number of 2D electrons resulting in orders of magnitude reduced conductance perpendicular to the step edges.

引用

页码：156 / 159

页数：4

共 15 条

[1]

BEENACKER CWJ, 1991, SOLID STATE PHYSICS, V44

[2] MAGNETIC DEPOPULATION OF 1D SUBBANDS IN A NARROW 2D ELECTRON-GAS IN A GAAS-ALGAAS HETEROJUNCTION [J].

BERGGREN, KF ;

THORNTON, TJ ;

NEWSON, DJ ;

PEPPER, M .

PHYSICAL REVIEW LETTERS, 1986, 57 (14) :1769-1772

[3] ONE-DIMENSIONAL SUBBANDS OF NARROW ELECTRON CHANNELS IN GATED ALXGA1-XAS GAAS HETEROJUNCTIONS [J].

BRINKOP, F ;

HANSEN, W ;

KOTTHAUS, JP ;

PLOOG, K .

PHYSICAL REVIEW B, 1988, 37 (11) :6547-6550

[4]

FRIEDLAND KJ, 1989, 893 ZIE, P65

[5]

HIGASHIWAKI H, 1995, JPN J APPL PHYS, V35, P606

[6] Multiatomic step formation with excellent uniformity on vicinal (111)A GaAs surfaces by metalorganic vapor-phase epitaxy [J].

Lee, JS ;

Isshiki, H ;

Sugano, T ;

Aoyagi, Y .

JOURNAL OF CRYSTAL GROWTH, 1997, 173 (1-2) :27-32

[7] UNIVERSAL CONDUCTANCE FLUCTUATIONS IN METALS - EFFECTS OF FINITE TEMPERATURE, INTERACTIONS, AND MAGNETIC-FIELD [J].

LEE, PA ;

STONE, AD ;

FUKUYAMA, H .

PHYSICAL REVIEW B, 1987, 35 (03) :1039-1070

[8] Large conductance anisotropy in a novel two-dimensional electron system grown on vicinal (111)B GaAs with multiatomic steps [J].

Nakamura, Y ;

Koshiba, S ;

Sakaki, H .

APPLIED PHYSICS LETTERS, 1996, 69 (26) :4093-4095

[9] PERIODIC MESOSCOPIC STEP ARRAYS BY STEP BUNCHING ON HIGH-INDEX GAAS-SURFACES [J].

NOTZEL, R ;

EISSLER, D ;

HOHENSTEIN, M ;

PLOOG, K .

JOURNAL OF APPLIED PHYSICS, 1993, 74 (01) :431-435

[10] TOPOGRAPHY OF HIGH-INDEX AND LOW-INDEX GAAS-SURFACES [J].

NOTZEL, R ;

DAWERITZ, L ;

PLOOG, K .

PHYSICAL REVIEW B, 1992, 46 (08) :4736-4743

← 1 2 →