@inproceedings{ec439501ce4540cdbd49f2332848bf3f,
title = "Spin polarization in GaAs/Al0.24Ga<0.76As heterostructures",
abstract = "The spontaneous spin polarization of a quantum point contact (QPC) formed by the lateral confinement of a high-mobility two-dimensional electron gas in a GaAs/AlGaAs split gate heterostrucrure is investigated. Self consistent calculations of the electronic structure of the QPC are performed using the spin-polarized density functional formalism of Kohn and Sham. Spin polarization occurs at low electron densities and exchange interaction is found to be the dominant mechanism driving the local spin polarization within the QPC. The cascading scattering matrix approach is utilized to compute the conductance and a conductance anomaly at ∼ 0.5 (2e2/h) has been observed. In addition to this, the sheet density dependence of the 0.7 conduction anomaly is investigated.",
keywords = "0.7 structure, 2DEG, LDA, QPC",
author = "Ashwin Ashok and Richard Akis and Dragica Vasileska and Ferry, {David K.}",
year = "2005",
language = "English (US)",
isbn = "0976798522",
series = "2005 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2005 Technical Proceedings",
pages = "17--20",
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",
}