Electric Field Induced by the Spin Current in a Semiconductor Dresselhaus Nanowire

Using a new spin current definition the spin current and spin-current-induced electric field in a weak semiconductor Dresselhaus spin-orbit coupling nanowire (quantum wire) have been investigated theoretically. It is found that two nonzero linear spin current density elements take on oscillation peaks at the center of nanowire and their strengths can be changed by the number of propagation modes and Dresselhaus constant, respectively. Moreover, the spin-current-induced electric field has been calculated and its strength is measurable with today's technology which can be used to spin current detection. Our consequences also show that the strengths of spin current and spin-current-induced electric field for the Dresselhaus case are smaller than that for the Rashba case.