Toward surface orbitronics: giant orbital magnetism from the orbitalRashba effect at the surface of sp-metals

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/486362.do
DOI
10.1038/srep46742
Title
Toward surface orbitronics: giant orbital magnetism from the orbitalRashba effect at the surface of sp-metals
Description
D.G. acknowledges the financial support from the Global Ph.D. FellowshipProgram funded by NRF (2014H1A2A1019219). H.W.L. is supported by theNational Research Foundation of Korea (NRF) grant (No. 2011-0030046). Wethank Changyoung Kim, Juba Bouaziz, Manuel dos Santos Dias, PhilippRussmann, and Samir Lounis for stimulating discussions.
abstract
As the inversion symmetry is broken at a surface, spin-orbit interaction gives rise to spin-dependent energy shifts - a phenomenon which is known as the spin Rashba effect. Recently, it has been recognized that an orbital counterpart of the spin Rashba effect - the orbital Rashba effect - can be realized at surfaces even without spin-orbit coupling. Here, we propose a mechanism for the orbital Rashba effect based on sp orbital hybridization, which ultimately leads to the electric polarization of surface states. For the experimentally well-studied system of a BiAg2 monolayer, as a proof of principle, we show from first principles that this effect leads to chiral orbital textures in k-space. In predicting the magnitude of the orbital moment arising from the orbital Rashba effect, we demonstrate the crucial role played by the Berry phase theory for the magnitude and variation of the orbital textures. As a result, we predict a pronounced manifestation of various orbital effects at surfaces, and proclaim the orbital Rashba effect to be a key platform for surface orbitronics.
provenance
Made available in Cube on 2018-09-28T16:05:35Z (GMT). No. of bitstreams: 0
language
English
author
Go, Dongwook
Hanke, Jan-Philipp
Buhl, Patrick M.
Freimuth, Frank
Bihlmayer, Gustav
Lee, Hyun-Woo
Mokrousov, Yuriy
Bluegel, Stefan
orcid
Blugel, Stefan/0000-0001-9987-4733; Bihlmayer,
Gustav/0000-0002-6615-1122; Lee, Hyun-Woo/0000-0002-1648-8093; Hanke,
Jan-Philipp/0000-0002-2113-7829
accessioned
2018-09-28T16:05:35Z
available
2018-09-28T16:05:35Z
issued
2017
citation
SCIENTIFIC REPORTS(7)
issn
2045-2322
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/486362.do
Funder
교육부
Funding Program
BK21플러스사업(0.5)
Project ID
1345273970
Jurisdiction
Rep.of Korea
Project Name
POSTECH BK21PLUS Physics Division
rights
openAccess
type
article


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