Study of spin-polarization and electron localization in semiconductor nanodevices
Title: Study of spin-polarization and electron localization in semiconductor nanodevices
SNIC Project: SNIC 2021/22-420
Project Type: SNIC Small Compute
Principal Investigator: Iryna Yakymenko <iryna.yakymenko@liu.se>
Affiliation: Linköpings universitet
Duration: 2021-06-01 – 2022-06-01
Classification: 10304
Homepage: https://liu.se/en/organisation/liu/ifm/teofy
Keywords:

Abstract

The project is within semiconductor spintronics that promises a new paradigm for memory and logic fabrication in future nanodevices. The present project aims at systematic studies of spin polarization, spin localization and spin-dependent transport in low-dimensional semiconductor-based nanosystems such as quantum point contacts (QPCs) and quantum wires (QWs) created in GaAs/AlGaAs semiconductor heterostructures. QPCs spin polarizers and spin valves controlled by applied electric fields are studied theoretically for real experimental conditions, i.e., for different types of self-consistent confinement and electron densities. Our present project supported by Carl Trygger Foundation deals with the study of effects of electron-electron interaction in formation of localized states and spin lattices in a wide asymmetric QW in the low electron density regime. Our next project for year 2022 submitted to Carl Trygger Foundation aims at theoretical study of the electronic lens embedded to the semiconductor heterostructure. Experimental system contains three quantum point contacts, two of them serves as a spin injector and a spin detector. The conductance of the third asymmetrically loaded quantum point contact is tested by electronic lens and a detector QPC. Special attention will be paid to investigation of a realization of electronic lens in a semiconductor heterostructure in the case of a shallow confinement and study of the electron transport and conductance anomalies through asymmetrically loaded QPC in experimentally proposed electron focusing device.