Spin Texture in Quantum Point Contacts in the Presence of Lateral Spin Orbit Coupling
Mesoscale and Nanoscale Physics
2010-10-01 v1
Abstract
A non-equilibrium Green's function formalism is used to study in detail the ballistic conductance of asymmetrically biased side-gated quantum point contacts (QPCs) in the presence of lateral spin-orbit coupling and electron-electron interaction for a wide range of QPC dimensions and gate bias voltage. Various conductance anomalies are predicted below the first quantized conductance plateau (G0=2e2/h) which occur due to spontaneous spin polarization in the narrowest portion of the QPC. The number of observed conductance anomalies increases with increasing aspect ratio (length/width) of the QPC constriction. These anomalies are fingerprints of spin textures in the narrow portion of the QPC.
Keywords
Cite
@article{arxiv.1009.6211,
title = {Spin Texture in Quantum Point Contacts in the Presence of Lateral Spin Orbit Coupling},
author = {J. Wan and M. Cahay and P. Debray and R. S. Newrock},
journal= {arXiv preprint arXiv:1009.6211},
year = {2010}
}
Comments
26 pages, 8 figures