Volume 82, Number 2, April 2008
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||11 April 2008|
0.7 anomaly and magnetotransport of disordered quantum wires
Instytut Fizyki Polskiej Akademii Nauk - al. Lotników 32/46, PL 02-668 Warszawa, Poland, EU
2 Instytut Fizyki Teoretycznej, Uniwersytet Warszawski - Hoża 69, PL 00-681 Warszawa, Poland, EU
3 ERATO Semiconductor Spintronics Project, Japan Science and Technology Agency - 1-18 Kitamemachi, Aoba-ku Sendai, 980-0023, Japan
4 Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University - Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan
Corresponding author: email@example.com
Accepted: 27 February 2008
The unexpected “0.7" plateau of conductance quantisation is usually observed for ballistic one-dimensional devices. In this work we study a quasi-ballistic quantum wire, for which the disorder-induced backscattering reduces the conductance quantisation steps. We find that the transmission probability resonances coexist with the anomalous plateau. The studies of these resonances as a function of the in-plane magnetic field and electron density point to the presence of spin polarisation at low carrier concentrations and constitute a method for the determination of the effective g-factor suitable for disordered quantum wires.
PACS: 73.63.Nm – Quantum wires / 73.23.Ad – Ballistic transport / 72.25.Dc – Spin polarised transport in semiconductors
© EPLA, 2008
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.