@inproceedings{604c372123254ea2aa5d5916ac010bd1,
title = "Spin density functional theory simulations of quantum point contacts: An investigation of spin filtering effects",
abstract = "In this paper, we present simulations of quantum point contacts (QPCs) formed in semiconductor heterostructures over which a metal split-gate has been deposited. Biasing the gates creates a quasi-1D channel (ie. a wire, or a QPC for very short channels) which separates the 2DEG into source and drain regions and through which current can flow. Besides the usual plateaus at integer multiples of G0= (2e2/h), more recent experiments on QPCs however have found additional non-integer plateaus, perhaps the most noteworthy being a ∼0.7 G0 conductance anomaly. Incorporating spin-density-functional theory (SDFT) into our calculations, we are able obtain similar anomalies in our simulations. Moreover, we find that these features can be correlated with the formation of a spin-dependent energy barrier structure.",
keywords = "Heterostructures, Quantum transport, Spin density functional theory, Spintronics",
author = "Richard Akis and David Ferry",
year = "2005",
language = "English (US)",
isbn = "0976798522",
series = "2005 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2005 Technical Proceedings",
pages = "240--243",
editor = "M. Laudon and B. Romanowicz",
booktitle = "2005 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2005 Technical Proceedings",
note = "2005 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2005 ; Conference date: 08-05-2005 Through 12-05-2005",
}