Spin-dependent electron transport in a Rashba quantum wire with rough edges

Details Spin-dependent electron transport in a Rashba quantum wire with rough edges Spin-dependent electron transport in a Rashba quantum wire with rough edges

2012-03-25

arxiv.org/abs/1203.5466v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages, 6 figures

Scientific paper

We investigate theoretically the spin-dependent electron transport in a Rashba quantum wire with rough edges. The charge and spin conductances are calculated as function of the electron energy or the wire length by adopting the spinresolved lattice Green function method. For a single disordered Rashba wire, it is found that the charge conductance quantization is destroyed by the edge disorder. However, a nonzero spin conductance can be generated and its amplitude can be manipulated by the wire length, which is attributed to the broken structure symmetries and the spin-dependent quantum interference induced by the rough boundaries. For a large ensemble of disordered Rashba wires, the average charge conductance decreases monotonically, however, the average spin conductance increases to a maximum value and then decreases, with increasing wire length. Further study shows that the influence of the rough edges on the charge and spin conductances can be eliminated by applying a perpendicular magnetic field to the wire. In addition, a very large magnitude of the spin conductance can be achieved when the electron energy lies between the two thresholds of each pair of subbands. These findings may not only benefit to further apprehend the transport properties of the Rashba low-dimensional systems but also provide some theoretical instructions to the application of spintronics devices.

Affiliated with

Also associated with

No associations

Rating

Spin-dependent electron transport in a Rashba quantum wire with rough edges does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spin-dependent electron transport in a Rashba quantum wire with rough edges, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin-dependent electron transport in a Rashba quantum wire with rough edges will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-74852