DETERMINATION OF ONE-DIMENSIONAL SUBBAND SPACINGS IN INAS/ALSB BALLISTIC CONSTRICTIONS USING MAGNETIC-FIELD MEASUREMENTS

被引：10

作者：

KOESTER, SJ ^{[1
]}

BOLOGNESI, CR ^{[1
]}

THOMAS, M ^{[1
]}

HU, EL ^{[1
]}

KROEMER, H ^{[1
]}

ROOKS, MJ ^{[1
]}

机构：

[1] CORNELL UNIV,NATL NANOFABRICAT FACIL,ITHACA,NY 14853

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.50.5710

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Quantized conductance measurements on InAs/AlSb split-gate ballistic constrictions with a varying perpendicular magnetic field are reported. The magnetic depopulation of the one-dimensional subbands is used to determine the energy spacing of the subbands in the constriction. Assuming a parabolic lateral-confining potential, a theoretical fit to our data reveals subband spacings as large as 10 meV. For fields greater than approximately 2 T, conductance plateaus emerge at odd integer multiples of e2/h, indicating the lifting of the spin degeneracy. The magnetic-field dependence of the G = 3e2/h conductance step width is used to obtain a rough estimate of the effective g factor in the constriction.

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收藏

页码：5710 / 5712

页数：3

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