Full counting statistics of transport electrons through a two-level quantum dot with spin–orbit coupling

Journal Article · Sun Feb 15 00:00:00 EST 2015 · Annals of Physics

DOI:https://doi.org/10.1016/J.AOP.2014.10.015· OSTI ID:22447587

Wang, Z. M. ^[1]; Xue, H. B. ^[2]; Xue, N. T. ^[1]

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1. Institute of Theoretical Physics and Department of Physics, Shanxi University, Taiyuan 030006 (China)
2. College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024 (China)

We study the full counting statistics of transport electrons through a semiconductor two-level quantum dot with Rashba spin–orbit (SO) coupling, which acts as a nonabelian gauge field and thus induces the electron transition between two levels along with the spin flip. By means of the quantum master equation approach, shot noise and skewness are obtained at finite temperature with two-body Coulomb interaction. We particularly demonstrate the crucial effect of SO coupling on the super-Poissonian fluctuation of transport electrons, in terms of which the SO coupling can be probed by the zero-frequency cumulants. While the charge currents are not sensitive to the SO coupling.

• OSTI ID: 22447587
• Journal Information: Annals of Physics, Vol. 353; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-4916
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASYMMETRY
ELECTRONS
L-S COUPLING
QUANTUM DOTS
SEMICONDUCTOR MATERIALS
SPIN FLIP
STATISTICS