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Cubic Rashba Effect in the Surface Spin Structure of Rare-Earth Ternary Materials

Usachov, D. Yu ; Nechaev, I. A. ; Poelchen, G. ; Güttler, M. ; Krasovskii, E. E. ; Schulz, S. ; Generalov, A. LU ; Kliemt, K. ; Kraiker, A. and Krellner, C. , et al. (2020) In Physical Review Letters 124(23).
Abstract

Spin-orbit interaction and structure inversion asymmetry in combination with magnetic ordering is a promising route to novel materials with highly mobile spin-polarized carriers at the surface. Spin-resolved measurements of the photoemission current from the Si-terminated surface of the antiferromagnet TbRh2Si2 and their analysis within an ab initio one-step theory unveil an unusual triple winding of the electron spin along the fourfold-symmetric constant energy contours of the surface states. A two-band k·p model is presented that yields the triple winding as a cubic Rashba effect. The curious in-plane spin-momentum locking is remarkably robust and remains intact across a paramagnetic-antiferromagnetic transition in spite of spin-orbit... (More)

Spin-orbit interaction and structure inversion asymmetry in combination with magnetic ordering is a promising route to novel materials with highly mobile spin-polarized carriers at the surface. Spin-resolved measurements of the photoemission current from the Si-terminated surface of the antiferromagnet TbRh2Si2 and their analysis within an ab initio one-step theory unveil an unusual triple winding of the electron spin along the fourfold-symmetric constant energy contours of the surface states. A two-band k·p model is presented that yields the triple winding as a cubic Rashba effect. The curious in-plane spin-momentum locking is remarkably robust and remains intact across a paramagnetic-antiferromagnetic transition in spite of spin-orbit interaction on Rh atoms being considerably weaker than the out-of-plane exchange field due to the Tb 4f moments.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
124
issue
23
article number
237202
publisher
American Physical Society
external identifiers
  • pmid:32603174
  • scopus:85087182031
ISSN
0031-9007
DOI
10.1103/PhysRevLett.124.237202
language
English
LU publication?
yes
id
c0a70e54-0813-456d-a8c7-11f97ddf4ddb
date added to LUP
2020-07-16 12:38:27
date last changed
2024-03-04 23:07:26
@article{c0a70e54-0813-456d-a8c7-11f97ddf4ddb,
  abstract     = {{<p>Spin-orbit interaction and structure inversion asymmetry in combination with magnetic ordering is a promising route to novel materials with highly mobile spin-polarized carriers at the surface. Spin-resolved measurements of the photoemission current from the Si-terminated surface of the antiferromagnet TbRh2Si2 and their analysis within an ab initio one-step theory unveil an unusual triple winding of the electron spin along the fourfold-symmetric constant energy contours of the surface states. A two-band k·p model is presented that yields the triple winding as a cubic Rashba effect. The curious in-plane spin-momentum locking is remarkably robust and remains intact across a paramagnetic-antiferromagnetic transition in spite of spin-orbit interaction on Rh atoms being considerably weaker than the out-of-plane exchange field due to the Tb 4f moments. </p>}},
  author       = {{Usachov, D. Yu and Nechaev, I. A. and Poelchen, G. and Güttler, M. and Krasovskii, E. E. and Schulz, S. and Generalov, A. and Kliemt, K. and Kraiker, A. and Krellner, C. and Kummer, K. and Danzenbächer, S. and Laubschat, C. and Weber, A. P. and Sánchez-Barriga, J. and Chulkov, E. V. and Santander-Syro, A. F. and Imai, T. and Miyamoto, K. and Okuda, T. and Vyalikh, D. V.}},
  issn         = {{0031-9007}},
  language     = {{eng}},
  number       = {{23}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Cubic Rashba Effect in the Surface Spin Structure of Rare-Earth Ternary Materials}},
  url          = {{http://dx.doi.org/10.1103/PhysRevLett.124.237202}},
  doi          = {{10.1103/PhysRevLett.124.237202}},
  volume       = {{124}},
  year         = {{2020}},
}