Shot-noise signatures of 0.7 structure and spin in a quantum point contact

被引：78

作者：

DiCarlo, L. ^{[1
]}

Zhang, Y.

McClure, D. T.

Reilly, D. J.

Marcus, C. M.

Pfeiffer, L. N.

West, K. W.

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[2] Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.97.036810

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report simultaneous measurement of shot noise and dc transport in a quantum point contact as a function of source-drain bias, gate voltage, and in-plane magnetic field. Shot noise at zero field exhibits an asymmetry related to the 0.7 structure in conductance. The asymmetry in noise evolves smoothly into the symmetric signature of spin-resolved electron transmission at high field. Comparison to a phenomenological model with density-dependent level splitting yields good quantitative agreement.

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页数：4

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