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Chinese Physics, 2004, Vol. 13(6): 938-941    DOI: 10.1088/1009-1963/13/6/026
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Spin current in double quantum dot

Zhao Hua (赵华)a, Zhang Guo-Feng (张国锋)ab, Yin Wen (殷雯)ab, Liang Jiu-Qing (梁九卿)a
a Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China; b State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
Abstract  We have studied the dynamical behaviours of two electrons confined in a double quantum dot driven by rotating magnetic fields in terms of the theory of Lewis-Riesenfeld Hermitian invariants for the explicitly time-dependent Hamiltonian. The coherent spin oscillations in the dot provide a generation source for spin current. Exact solutions obtained allow us to investigate the dynamical properties of the spin localization for various initial localized states.
Keywords:  spin current      quantum dot      time-dependent transformation  
Received:  13 November 2003      Accepted manuscript online: 
PACS:  73.21.La (Quantum dots)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10075032).

Cite this article: 

Zhao Hua (赵华), Zhang Guo-Feng (张国锋), Yin Wen (殷雯), Liang Jiu-Qing (梁九卿) Spin current in double quantum dot 2004 Chinese Physics 13 938

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