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Spin-orbit coupled spin-polarised hole gas at the CrSe2-terminated surface of AgCrSe2

Siemann, Gesa R. ; Kim, Seo Jin ; Morales, Edgar Abarca ; Murgatroyd, Philip A.E. ; Zivanovic, Andela ; Edwards, Brendan ; Marković, Igor ; Mazzola, Federico ; Trzaska, Liam and Clark, Oliver J. , et al. (2023) In npj Quantum Materials 8(1).
Abstract

In half-metallic systems, electronic conduction is mediated by a single spin species, offering enormous potential for spintronic devices. Here, using microscopic-area angle-resolved photoemission, we show that a spin-polarised two-dimensional hole gas is naturally realised in the polar magnetic semiconductor AgCrSe2 by an intrinsic self-doping at its CrSe2-terminated surface. Through comparison with first-principles calculations, we unveil a striking role of spin-orbit coupling for the surface hole gas, unlocked by both bulk and surface inversion symmetry breaking, suggesting routes for stabilising complex magnetic textures in the surface layer of AgCrSe2.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
npj Quantum Materials
volume
8
issue
1
article number
61
publisher
Nature Publishing Group
external identifiers
  • scopus:85174621934
ISSN
2397-4648
DOI
10.1038/s41535-023-00593-4
language
English
LU publication?
yes
id
9b88148f-afcc-4eb6-9662-af82abe33cbb
date added to LUP
2024-01-11 15:26:21
date last changed
2025-04-04 14:16:22
@article{9b88148f-afcc-4eb6-9662-af82abe33cbb,
  abstract     = {{<p>In half-metallic systems, electronic conduction is mediated by a single spin species, offering enormous potential for spintronic devices. Here, using microscopic-area angle-resolved photoemission, we show that a spin-polarised two-dimensional hole gas is naturally realised in the polar magnetic semiconductor AgCrSe<sub>2</sub> by an intrinsic self-doping at its CrSe<sub>2</sub>-terminated surface. Through comparison with first-principles calculations, we unveil a striking role of spin-orbit coupling for the surface hole gas, unlocked by both bulk and surface inversion symmetry breaking, suggesting routes for stabilising complex magnetic textures in the surface layer of AgCrSe<sub>2</sub>.</p>}},
  author       = {{Siemann, Gesa R. and Kim, Seo Jin and Morales, Edgar Abarca and Murgatroyd, Philip A.E. and Zivanovic, Andela and Edwards, Brendan and Marković, Igor and Mazzola, Federico and Trzaska, Liam and Clark, Oliver J. and Bigi, Chiara and Zhang, Haijing and Achinuq, Barat and Hesjedal, Thorsten and Watson, Matthew D. and Kim, Timur K. and Bencok, Peter and van der Laan, Gerrit and Polley, Craig M. and Leandersson, Mats and Fedderwitz, Hanna and Ali, Khadiza and Balasubramanian, Thiagarajan and Schmidt, Marcus and Baenitz, Michael and Rosner, Helge and King, Phil D.C.}},
  issn         = {{2397-4648}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{Nature Publishing Group}},
  series       = {{npj Quantum Materials}},
  title        = {{Spin-orbit coupled spin-polarised hole gas at the CrSe<sub>2</sub>-terminated surface of AgCrSe<sub>2</sub>}},
  url          = {{http://dx.doi.org/10.1038/s41535-023-00593-4}},
  doi          = {{10.1038/s41535-023-00593-4}},
  volume       = {{8}},
  year         = {{2023}},
}