期刊
PHYSICAL REVIEW E
卷 95, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.95.042121
关键词
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资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico [303891/2013-0]
- Fundacao de Amparo a Pesquisa do Estado do Rio de Janeiro [E-26/102.760/2012, E-26/110.734/2012, E-26/102.348/2013]
We present a simplified description for spin-dependent electronic transport in honeycomb-lattice structures with spin-orbit interactions, using generalizations of the stochastic nonequilibrium model known as the totally asymmetric simple exclusion process. Mean field theory and numerical simulations are used to study currents, density profiles, and current polarization in quasi-one-dimensional systems with open boundaries, and externally imposed particle injection (alpha) and ejection (beta) rates. We investigate the influence of allowing for double site occupancy, according to Pauli's exclusion principle, on the behavior of the quantities of interest. We find that double occupancy shows strong signatures for specific combinations of rates, namely high a and low beta, but otherwise its effects are quantitatively suppressed. Comments are made on the possible relevance of the present results to experiments on suitably doped graphenelike structures.
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