# Spin-polarized saddle points in the topological surface states of elemental bismuth revealed by pump-probe spin- and angle-resolved photoemission spectroscopy

https://mdr.nims.go.jp/datasets/0f4af390-9f2f-461c-aa60-cbef70ab68cb

## File

- [2303.17816v1.pdf](https://mdr.nims.go.jp/filesets/a2ed763d-458d-4c73-ae73-70caefb87b3d/download) ([Detail](https://mdr.nims.go.jp/filesets/a2ed763d-458d-4c73-ae73-70caefb87b3d.md))

## Id

0f4af390-9f2f-461c-aa60-cbef70ab68cb

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-07-02T23:45:11.489593Z

## Updated at

2024-07-08T00:33:57.072756Z

## Published at

2024-07-04T07:30:20.060960Z

## Doi

https://doi.org/10.48505/nims.4574

## First published url

https://doi.org/10.1103/physrevb.110.l041401

## Date published

2024-07-01

## Recorded date published

2024-7

## Resource type

journal_article

## Manuscript type

authors_original

## Collection



## Title

- title: Spin-polarized saddle points in the topological surface states of elemental
    bismuth revealed by pump-probe spin- and angle-resolved photoemission spectroscopy
  title_type: original
  lang: en

## Description

- description: We use a pomp-probe, spin- and angle-resolved photoemission spectroscopy
    (ARPES) with a 10.7 eV laser accessible up to the Brillouin zone edge, and reveal
    for the first time the entire band structure, including the unoccupied side, for
    the elemental bismuth (Bi) with the spin-polarized surface states. Our data identify
    Bi as in a strong topological insulator phase (Z2=1) against the prediction of
    most band calculations. Furthermore, we unveil that the unoccupied topological
    surface states possess spin-polarized saddle points yielding van Hove singularity,
    providing an excellent platform for the future development of opto-spintronics.
  description_type: abstract
  lang: und

## Creator

- name: Yuto Fukushima
  role: author
- name: Kaishu Kawaguchi
  role: author
- name: Kenta Kuroda
  role: author
  orcid: https://orcid.org/0000-0002-0151-0876
- name: Masayuki Ochi
  role: author
  orcid: https://orcid.org/0000-0001-7438-4797
- name: Motoaki Hirayama
  role: author
- name: Ryo Mori
  role: author
  orcid: https://orcid.org/0000-0002-8684-9421
- name: Hiroaki Tanaka
  role: author
  orcid: https://orcid.org/0000-0002-5178-7777
- name: Ayumi Harasawa
  role: author
  orcid: https://orcid.org/0000-0002-2455-4863
- name: Takushi Iimori
  role: author
- name: Zhigang Zhao
  role: author
- name: Shuntaro Tani
  role: author
  orcid: https://orcid.org/0000-0003-0608-7410
- name: Koichiro Yaji
  role: author
  orcid: https://orcid.org/0000-0002-0721-1316
- name: Shik Shin
  role: author
- name: Fumio Komori
  role: author
  orcid: https://orcid.org/0000-0002-6405-4177
- name: Yohei Kobayashi
  role: author
  orcid: https://orcid.org/0000-0002-9959-566X
- name: Takeshi Kondo
  role: author
  orcid: https://orcid.org/0000-0002-3912-5172

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: Photoemission spectroscopy
  schema: not_defined
- subject: Topological surface state
  schema: not_defined
- subject: Bismuth
  schema: not_defined

## Rights

- description: "©2024 American Physical Society"
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review B
  issn: '24699950'
  volume: '110'
  issue: '4'
  article_number: L041401

## Conference



## Related item



## Funding

- funder_name: Kao Foundation for Arts and Sciences
- identifier: JP21H04439
  funder_name: Japan Society for the Promotion of Science
- identifier: JP21H04652
  funder_name: Japan Society for the Promotion of Science
- identifier: JP23K13041
  funder_name: Japan Society for the Promotion of Science
- identifier: JPMXS0118068681
  funder_name: Ministry of Education, Culture, Sports, Science and Technology

## Instrument



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## Measurement method



## Specimen



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## Fileset

- id: a2ed763d-458d-4c73-ae73-70caefb87b3d
  filename: 2303.17816v1.pdf
  content_type: application/pdf
  size: 5017582
  md5: 39e08cfde0823be08be5404a3c52cdbc

## Thumbnail

fileset_id: a2ed763d-458d-4c73-ae73-70caefb87b3d
filename: 2303.17816v1.pdf