Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-6960
Authors: Go, Dongwook
Jo, Daegeun
Lee, Hyun-Woo
Kläui, Mathias
Mokrousov, Yuriy
Title: Orbitronics: orbital currents in solids
Online publication date: 23-May-2022
Year of first publication: 2021
Language: english
Abstract: In solids, electronic Bloch states are formed by atomic orbitals. While it is natural to expect that orbital composition and information about Bloch states can be manipulated and transported, in analogy to the spin degree of freedom extensively studied in past decades, it has been assumed that orbital quenching by the crystal field prevents significant dynamics of orbital degrees of freedom. However, recent studies reveal that an orbital current, given by the flow of electrons with a finite orbital angular momentum, can be electrically generated and transported in wide classes of materials despite the effect of orbital quenching in the ground state. Orbital currents also play a fundamental role in the mechanisms of other transport phenomena such as spin Hall effect and valley Hall effect. Most importantly, it has been proposed that orbital currents can be used to induce magnetization dynamics, which is one of the most pivotal and explored aspects of magnetism. Here, we give an overview of recent progress and the current status of research on orbital currents. We review proposed physical mechanisms for generating orbital currents and discuss candidate materials where orbital currents are manifest. We review recent experiments on orbital current generation and transport and discuss various experimental methods to quantify this elusive object at the heart of orbitronics-an area which exploits the orbital degree of freedom as an information carrier in solid-state devices.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
ROR: https://ror.org/023b0x485
DOI: http://doi.org/10.25358/openscience-6960
Version: Published version
Publication type: Zeitschriftenaufsatz
Document type specification: Scientific article
License: In Copyright
Information on rights of use: http://rightsstatements.org/vocab/InC/1.0/
Journal: epl
135
3
Pages or article number: 37001
Publisher: EDP Science
Publisher place: Les-Ulis
Issue date: 2021
ISSN: 0295-5075
Publisher DOI: 10.1209/0295-5075/ac2653
Appears in collections:JGU-Publikationen

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