18–22 Oct 2021
Matsue, Shimane Prefecture, Japan
Asia/Tokyo timezone

Concept of projection-type 3D spin-resolving electron detector with spatial resolution and new type of polarized electron source

21 Oct 2021, 09:50
20m
Room 401 (Kunibiki Messe)

Room 401

Kunibiki Messe

Parallel Session Presentation Polarized Sources and Targets Polarized Sources and Targets

Speaker

Oleg Tereshchenko (Institute of Semiconductor Physics, SB RAS)

Description

The concept of an imaging-type 3D spin detector, based on the combination of spin-exchange interactions in the ferromagnetic film and spin selectivity of the electron–photon conversion effect in a semiconductor heterostructure, is proposed and demonstrated on a model system. This novel multichannel concept is based on the idea of direct transfer of a 2D spin-polarized electron distribution to image cathodoluminescence (CL) [1]. The detector is a hybrid structure consisting of a thin magnetic layer deposited on a semiconductor structure allowing measurement of the spatial and polarization-dependent CL intensity from injected spin-polarized free electrons. The ferromagnetic/ semiconductor detector has the potential for realizing multichannel 3D vectorial reconstruction of spin polarization in momentum microscope and angle-resolved photoelectron spectroscopy systems.
A new type of spin polarized electron source based on the alkali antimonides photocathodes are discovered. It is shown that the degree of polarization is comparable to that observed for GaAs photocathodes.

Primary authors

Oleg Tereshchenko (Institute of Semiconductor Physics, SB RAS) Vladimir A. Golyashov (Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090 bNovosibirsk State University, Novosibirsk 630090, Russian Federation) Vadim S. Rusetsky (Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090) Andrey V. Mironov (CJSC EKRAN-FEP, Novosibirsk 630060, Russian Federation) Alexander Yu. Demin (CJSC EKRAN-FEP, Novosibirsk 630060, Russian Federation)

Presentation materials