Spin-Dependent Transport and Wigner Crystallization in All-Electric Spin Polarizer
Title: Spin-Dependent Transport and Wigner Crystallization in All-Electric Spin Polarizer
SNIC Project: SNIC 2014/1-151
Project Type: SNAC Medium
Principal Investigator: Irina Yakymenko <irina@ifm.liu.se>
Affiliation: Linköpings universitet
Duration: 2014-05-01 – 2015-05-01
Classification: 10304
Keywords:

Abstract

The project is motivated by development of all-electric spintronics that promises a new paradigm for memory and logic fabrication. Relying on the results of our long-term research on the spin-dependent transport properties of the low-dimensional semiconductors we will study the possibility of realization of these schemes in high-mobility InAs /InAlAs and GaAs/AlGaAs heterostructures. The project ranges from fundamental studies of the many-body physics involved in fully electrical spin control of semiconductor-based quantum wires (QWs) and quantum point contacts (QPCs) to discussions about realization of devices such as recently proposed all electric spin polarizers and spin valve. These devices may be a prototype of a new generation of electrically programmable and logic devices for implementation of quantum qubits and quantum circuits for quantum computing. The main goal of the project is to study the patterns of spontaneous and localized spin polarization in QPCs and QWs controlled by applied electric fields.The emphasis will be on studies of Wigner crystallization controlled by means of lateral spin-orbit interation in the QPC spin polarizers. Special attention will be on investigation of factors affecting the transport in a real experimental situation, that is, type of self-consistent confinement, spin-orbit interactions, Coulomb and spin blockade, influence of the impurities.