Volume 79, Number 1, July 2007
|Number of page(s)||5|
|Published online||14 June 2007|
Topological force and torque in spin-orbit coupling systems
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences - Beijing 100080, China
2 School of Physics, Yunnan University - Kunming 650091, China
Accepted: 22 May 2007
The topological force and torque are investigated in systems with spin-orbit coupling. It is demonstrated that the topological force and torque appears as a pure relativistic quantum effect in an electromagnetic field. The origin of both topological force and torque is the Zitterbewegung effect. Considering nonlinear behaviors of spin-orbit coupling, we address possible novel phenomena driven by the topological forces.
PACS: 03.65.Pm – Relativistic wave equations / 72.10.Bg – General formulation of transport theory / 71.70.Ej – Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect
© Europhysics Letters Association, 2007
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