Bercioux, Dario and Frustaglia, Diego and Governale, Michele
Signatures of spin-related phases in transport through regular polygons.
Physical Review B 72, p. 113310.
Other URL: http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRBMDO000072000011113310000001&idtype=cvips&gifs=yes
We address the subject of transport in one-dimensional ballistic polygon loops subject to Rashba spin-orbit coupling. We identify the role played by the polygon vertices in the accumulation of spin-related phases by studying interference effects as a function of the spin-orbit coupling strength. We find that the vertices act as strong spin-scattering centers that hinder the developing of Aharovov-Casher and Berry phases. In particular, we show that the oscillation frequency of interference pattern can be doubled by modifying the shape of the loop from a square to a circle.