QUANTIZED CONDUCTANCE OBSERVED IN QUANTUM WIRES 2-MU-M TO 10-MU-M LONG

被引：32

作者：

HONDA, T

TARUCHA, S

SAKU, T

TOKURA, Y

机构：

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

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1995年 / 34卷 / 1A期

关键词：

QUANTIZED CONDUCTANCE; QUANTUM WIRE; LONG BALLISTIC WIRE; BALLISTIC TRANSPORT; MODULATION-DOPED HETEROSTRUCTURE;

D O I：

10.1143/JJAP.34.L72

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We observe quantized conductance in 2- to 10-mum-long wires formed in a very-high-mobility modulation-doped heterostructure. These wires have a new gate configuration that facilitates strong lateral constriction despite the large separation between the surface and the electron channel. Random potential scattering in the wire causes a conductance dip near the threshold of the higher-lying subband. This scattering is strongly suppressed when only the ground subband is occupied. Wires longer than 20 mum display a conductance step of 0.6 to 0.7 (2e2/h). This step is probably made more evident by the effect of thermal broadening as well as by a dip in the conductance near the threshold for the higher-lying subband.

引用

页码：L72 / L75

页数：4

共 12 条

[1] EVANESCENT MODES AND SCATTERING IN QUASI-ONE-DIMENSIONAL WIRES [J].