Persistent Spin Current in a Hard-Wall Confining Quantum Wire with Weak Dresselhaus Spin-Orbit Coupling
FU Xi 1,2 and ZHOU Guang-Hui1
Author information+
1Department of Physics, Hunan Normal University, Changsha 410081, China
2Department of Electronics and Physics, Hunan College of Science and Technology, Yongzhou 425100, China
{{custom_zuoZheDiZhi}}
{{custom_authorNodes}}
{{custom_bio.content}}
{{custom_bio.content}}
{{custom_authorNodes}}
Show less
History+
Received
Revised
Published
2008-04-11
2008-06-20
2009-02-15
Issue Date
2009-02-15
Abstract
We investigate theoretically the spin current in a quantum wire with weak Dresselhaus spin-orbit coupling connected to two normal conductors. Both the quantum wire and conductors are described by a hard-wall confining potential. Using the electron wave-functions in the quantum wire and a new definition of spin current, we have calculated the elements of linear spin current density jTs,xi and jTs,yi (i=x,y,z). We find that the elements jTs,xx and jTs,yy have a antisymmetrical relation and the element jTs,yz has the same amount level as jTs,xx and jTs,yy. We also find a net linear spin current density, which has peaks at the center of quantum wire. The net linear spin current can induce a linear electric field, which may imply a way of spin current detection.
FU Xi , and ZHOU Guang-Hui.
Persistent Spin Current in a Hard-Wall Confining Quantum Wire with Weak Dresselhaus Spin-Orbit Coupling[J]. Communications in Theoretical Physics, 2009, 51(02): 341-344
PDF(140 KB)
