Electrically Controlled Spin Injection from Giant Rashba Spin-Orbit Conductor BiTeBr
Journal article, 2020
Ferromagnetic materials are the widely used source of spin-polarized electrons in spintronic devices, which are controlled by external magnetic fields or spin-transfer torque methods. However, with increasing demand for smaller and faster spintronic components utilization of spin-orbit phenomena provides promising alternatives. New materials with unique spin textures are highly desirable since all-electric creation and control of spin polarization is expected where the strength, as well as an arbitrary orientation of the polarization, can be defined without the use of a magnetic field. In this work, we use a novel spin-orbit crystal BiTeBr for this purpose. Because of its giant Rashba spin splitting, bulk spin polarization is created at room temperature by an electric current. Integrating BiTeBr crystal into graphene-based spin valve devices, we demonstrate for the first time that it acts as a current-controlled spin injector, opening new avenues for future spintronic applications in integrated circuits.
polar semiconductors
2D materials
all-electric spin control
Spintronics
graphene
Rashba-Edelstein effect
nonlocal spin valve
Author
Zoltan Kovacs-Krausz
Budapest University of Technology and Economics
Anamul Md Hoque
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Péter Makk
Budapest University of Technology and Economics
Bálint Szentpéteri
Budapest University of Technology and Economics
Mátyás Kocsis
Budapest University of Technology and Economics
Bálint Fülöp
Budapest University of Technology and Economics
Michael Vasilievich Yakushev
Russian Academy of Sciences
Ural Federal University
Tatyana Vladimirovna Kuznetsova
Russian Academy of Sciences
Ural Federal University
Oleg Evgenevich Tereshchenko
Novosibirsk State University
Russian Academy of Sciences
Saint Petersburg State University - Spsu
Konstantin Aleksandrovich Kokh
Novosibirsk State University
Russian Academy of Sciences
Saint Petersburg State University - Spsu
István Endre Lukács
Institute of Technical Physics and Materials Science
Takashi Taniguchi
National Institute for Materials Science (NIMS)
Kenji Watanabe
National Institute for Materials Science (NIMS)
Saroj Prasad Dash
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Szabolcs Csonka
Budapest University of Technology and Economics
Nano Letters
1530-6984 (ISSN) 1530-6992 (eISSN)
Vol. 20 7 4782-4791Subject Categories
Other Physics Topics
Other Electrical Engineering, Electronic Engineering, Information Engineering
Condensed Matter Physics
DOI
10.1021/acs.nanolett.0c00458
PubMed
32511931