TY - JOUR
T1 - Rashba interaction as an external Yang-Mills field applied to one-dimensional system
AU - Liu, Chao xing
AU - Zhu, Zhen Gang
AU - Zhu, Bang fen
N1 - Funding Information:
This work is supported by the NSFC (Grant no. 10374056, 10574076), the MOE of China (Grant no. 2002003089), and the Program of Basic Research Development of China (Grant no. 2001CB610508).
PY - 2006/5
Y1 - 2006/5
N2 - The Rashba interaction in the low-dimensional semiconductor systems, which plays an important role in the spintronics, can be regarded as an external Yang-Mills field. With this viewpoint, the gauge field in a one dimensional (1D)-ring in the presence of the Rashba interaction can be reduced into two independent U(1) fields through an SU(2) transformation, which can also be extended to arbitrary 1D Rashba system. As an instance, a two-arms spin interferometer with a quantum dot embedded in one of its arms is considered. By tuning the Rashba interaction, the oscillation of the spin polarization of the current is predicted. Another application is about the persistent spin current in a Rashba ring. Keep the SU(2) gauge field in mind, it is straightforward to find that the persistent spin current may result from the Rashba interaction.
AB - The Rashba interaction in the low-dimensional semiconductor systems, which plays an important role in the spintronics, can be regarded as an external Yang-Mills field. With this viewpoint, the gauge field in a one dimensional (1D)-ring in the presence of the Rashba interaction can be reduced into two independent U(1) fields through an SU(2) transformation, which can also be extended to arbitrary 1D Rashba system. As an instance, a two-arms spin interferometer with a quantum dot embedded in one of its arms is considered. By tuning the Rashba interaction, the oscillation of the spin polarization of the current is predicted. Another application is about the persistent spin current in a Rashba ring. Keep the SU(2) gauge field in mind, it is straightforward to find that the persistent spin current may result from the Rashba interaction.
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U2 - 10.1016/j.physe.2005.12.151
DO - 10.1016/j.physe.2005.12.151
M3 - Article
AN - SCOPUS:33646180644
VL - 32
SP - 391
EP - 394
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
SN - 1386-9477
IS - 1-2 SPEC. ISS.
ER -