QUANTIZED CONDUCTANCE IN INGAAS POINT CONTACTS AT HIGH-TEMPERATURES

被引：8

作者：

BEVER, T

HIRAYAMA, Y

TARUCHA, S

机构：

[1] NTT Basic Research Laboratories, Kanagawa, 243-01

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1994年 / 33卷 / 6A期

关键词：

QUANTIZED CONDUCTANCE; INGAAS/INALAS HETEROSTRUCTURE; FOCUSED ION BEAM; INSULATION WRITING; INPLANE GATE;

D O I：

10.1143/JJAP.33.L800

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We used focused ion beam insulation writing to fabricate quantum point contacts in the two-dimensional electron gas of an InGaAs/InAlAs heterostructure. The conductance as a function of voltage on an adjacent in-plane gate exhibited steps for temperatures up to 60 K. From the temperature and source-drain voltage and magnetic field dependence of the conductance steps, we estimated the one-dimensional subband spacing to be 15 meV.

引用

收藏

页码：L800 / L803

页数：4

相关论文

共 18 条

[1] LATERAL SPREADING OF FOCUSED ION-BEAM-INDUCED DAMAGE [J].

BEVER, T ;

JAGERWALDAU, G ;

ECKBERG, M ;

HEYEN, ET ;

LAGE, H ;

WIECK, AD ;

PLOOG, K .

JOURNAL OF APPLIED PHYSICS, 1992, 72 (05) :1858-1863

[2] EFFECT OF IMPURITIES ON THE QUANTIZED CONDUCTANCE OF NARROW CHANNELS [J].

CHU, CS ;

SORBELLO, RS .

PHYSICAL REVIEW B, 1989, 40 (09) :5941-5949

[3] QUASI-ONE-DIMENSIONAL BALLISTIC ELECTRON-TRANSPORT IN IN-PLANE-GATED CHANNELS AT LIQUID-NITROGEN TEMPERATURE [J].

DEVRIES, DK ;

PLOOG, K ;

WIECK, AD .

SOLID-STATE ELECTRONICS, 1994, 37 (4-6) :701-703

[4]

FUJISAWA T, 1993, INT C SOLID STATE DE

[5] QUANTUM CONDUCTION IN NARROW CONSTRICTIONS [J].

HE, S ;

DASSARMA, S .

PHYSICAL REVIEW B, 1989, 40 (05) :3379-3382

[6] EFFECT OF STRUCTURE ON TRANSPORT CHARACTERISTICS OF BALLISTIC ONE-DIMENSIONAL CHANNEL [J].

HIRAYAMA, Y ;

SAKU, T ;

HORIKOSHI, Y .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1989, 28 (04) :L701-L703

[7] LOW-TEMPERATURE TRANSPORT CHARACTERISTICS OF ALGAAS-GAAS IN-PLANE-GATED WIRES [J].

HIRAYAMA, Y ;

WIECK, AD ;

PLOOG, K .

JOURNAL OF APPLIED PHYSICS, 1992, 72 (07) :3022-3028

[8] HIGH-TEMPERATURE BALLISTIC TRANSPORT OBSERVED IN ALGAAS/INGAAS/GAAS SMALL 4-TERMINAL STRUCTURES [J].

HIRAYAMA, Y ;

TARUCHA, S .

APPLIED PHYSICS LETTERS, 1993, 63 (17) :2366-2368

[9] THEORY OF THE CONDUCTANCE OF BALLISTIC QUANTUM CHANNELS [J].

KIRCZENOW, G .

SOLID STATE COMMUNICATIONS, 1988, 68 (08) :715-718

[10] QUANTIZED CONDUCTANCE OF BALLISTIC CONSTRICTIONS IN INAS/ALSB QUANTUM-WELLS [J].

KOESTER, SJ ;

BOLOGNESI, CR ;

ROOKS, MJ ;

HU, EL ;

KROEMER, H .

APPLIED PHYSICS LETTERS, 1993, 62 (12) :1373-1375