Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Giant valleyZeeman coupling in the surface layer of an intercalated transition metal dichalcogenide

Edwards, B. ; Dowinton, O. ; Hall, A. E. ; Murgatroyd, P. A.E. ; Buchberger, S. ; Antonelli, T. ; Siemann, G. R. ; Rajan, A. ; Morales, E. Abarca and Zivanovic, A. , et al. (2023) In Nature Materials 22(4). p.459-465
Abstract

Spin–valley locking is ubiquitous among transition metal dichalcogenides with local or global inversion asymmetry, in turn stabilizing properties such as Ising superconductivity, and opening routes towards ‘valleytronics’. The underlying valley–spin splitting is set by spin–orbit coupling but can be tuned via the application of external magnetic fields or through proximity coupling. However, only modest changes have been realized to date. Here, we investigate the electronic structure of the V-intercalated transition metal dichalcogenide V1/3NbS2 using microscopic-area spatially resolved and angle-resolved photoemission spectroscopy. Our measurements and corresponding density functional theory calculations reveal... (More)

Spin–valley locking is ubiquitous among transition metal dichalcogenides with local or global inversion asymmetry, in turn stabilizing properties such as Ising superconductivity, and opening routes towards ‘valleytronics’. The underlying valley–spin splitting is set by spin–orbit coupling but can be tuned via the application of external magnetic fields or through proximity coupling. However, only modest changes have been realized to date. Here, we investigate the electronic structure of the V-intercalated transition metal dichalcogenide V1/3NbS2 using microscopic-area spatially resolved and angle-resolved photoemission spectroscopy. Our measurements and corresponding density functional theory calculations reveal that the bulk magnetic order induces a giant valley-selective Ising coupling exceeding 50 meV in the surface NbS2 layer, equivalent to application of a ~250 T magnetic field. This energy scale is of comparable magnitude to the intrinsic spin–orbit splittings, and indicates how coupling of local magnetic moments to itinerant states of a transition metal dichalcogenide monolayer provides a powerful route to controlling their valley–spin splittings.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; ; and , et al. (More)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; and (Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature Materials
volume
22
issue
4
pages
459 - 465
publisher
Nature Publishing Group
external identifiers
  • pmid:36658327
  • scopus:85146538282
ISSN
1476-1122
DOI
10.1038/s41563-022-01459-z
language
English
LU publication?
yes
id
3ba9e8cc-c48f-4b76-bb3b-e246ec6875f0
date added to LUP
2023-02-14 09:51:03
date last changed
2024-04-18 18:44:20
@article{3ba9e8cc-c48f-4b76-bb3b-e246ec6875f0,
  abstract     = {{<p>Spin–valley locking is ubiquitous among transition metal dichalcogenides with local or global inversion asymmetry, in turn stabilizing properties such as Ising superconductivity, and opening routes towards ‘valleytronics’. The underlying valley–spin splitting is set by spin–orbit coupling but can be tuned via the application of external magnetic fields or through proximity coupling. However, only modest changes have been realized to date. Here, we investigate the electronic structure of the V-intercalated transition metal dichalcogenide V<sub>1/3</sub>NbS<sub>2</sub> using microscopic-area spatially resolved and angle-resolved photoemission spectroscopy. Our measurements and corresponding density functional theory calculations reveal that the bulk magnetic order induces a giant valley-selective Ising coupling exceeding 50 meV in the surface NbS<sub>2</sub> layer, equivalent to application of a ~250 T magnetic field. This energy scale is of comparable magnitude to the intrinsic spin–orbit splittings, and indicates how coupling of local magnetic moments to itinerant states of a transition metal dichalcogenide monolayer provides a powerful route to controlling their valley–spin splittings.</p>}},
  author       = {{Edwards, B. and Dowinton, O. and Hall, A. E. and Murgatroyd, P. A.E. and Buchberger, S. and Antonelli, T. and Siemann, G. R. and Rajan, A. and Morales, E. Abarca and Zivanovic, A. and Bigi, C. and Belosludov, R. V. and Polley, C. M. and Carbone, D. and Mayoh, D. A. and Balakrishnan, G. and Bahramy, M. S. and King, P. D.C.}},
  issn         = {{1476-1122}},
  language     = {{eng}},
  number       = {{4}},
  pages        = {{459--465}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Nature Materials}},
  title        = {{Giant valleyZeeman coupling in the surface layer of an intercalated transition metal dichalcogenide}},
  url          = {{http://dx.doi.org/10.1038/s41563-022-01459-z}},
  doi          = {{10.1038/s41563-022-01459-z}},
  volume       = {{22}},
  year         = {{2023}},
}