Nonlocal bias spectroscopy of the self-consistent bound state in quantum point contacts near pinch off

被引：13

作者：

Yoon, Y. ^{[1
]}

Kang, M. -G. ^{[1
]}

Ivanushkin, P. ^{[2
]}

Mourokh, L. ^{[2
]}

Morimoto, T. ^{[3
]}

Aoki, N. ^{[4
]}

Reno, J. L. ^{[5
]}

Ochiai, Y. ^{[4
]}

Bird, J. P. ^{[1
,4
]}

机构：

[1] SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA

[2] CUNY Queens Coll, Dept Phys, Flushing, NY 11367 USA

[3] RIKEN, Adv Device Lab, Wako, Saitama 3510198, Japan

[4] Chiba Univ, Grad Sch Adv Integrat Sci, Inage Ku, Chiba 2638522, Japan

[5] Sandia Natl Labs, Dept Sci, CINT, Albuquerque, NM 87185 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 21期

关键词：

g-factor; quantum dots; quantum point contacts;

D O I：

10.1063/1.3142418

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We perform nonlocal bias spectroscopy of the self-consistent bound state (BS) in quantum point contacts (QPCs), determining the lever arm (gamma) that governs the gate-voltage induced shift in its energy. The value of gamma allows us to infer an enhanced g factor, and large remnant spin splitting, for the BS. Our results show many similarities with bias spectroscopy of quantum dots and are reproduced by calculations that assume a discrete BS coupled to a reservoir. This study therefore provides independent evidence in support of the notion of BS formation in QPCs.

引用

页数：3

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