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Bulk band structure of Ru O2 measured with soft x-ray angle-resolved photoemission spectroscopy

Lin, Zihan ; Chen, Dong ; Lu, Wenlong ; Liang, Xin ; Feng, Shiyu ; Yamagami, Kohei ; Osiecki, Jacek LU ; Leandersson, Mats LU ; Thiagarajan, Balasubramanian LU and Liu, Junwei , et al. (2025) In Physical Review B 111(13).
Abstract

Altermagnetism exhibits unique physical properties such as spin-momentum locking, anomalous Hall effect, nontrivial topological phase, and giant magnetoresistance. Among all the predicted candidates, several room-temperature altermagnets are suggested to host significant potential applications. RuO2 has been proposed as the most promising candidate. However, recently, there is intense debate about whether RuO2 exhibits magnetic order or not. Experiments by several different technologies claim the collinear magnetic order and spin-splitting-induced effects. However, very recent muon spin resonance (μSR) results reveal no magnetic order in RuO2, which indicates that the time-reversal symmetry is not broken. Direct observation of the... (More)

Altermagnetism exhibits unique physical properties such as spin-momentum locking, anomalous Hall effect, nontrivial topological phase, and giant magnetoresistance. Among all the predicted candidates, several room-temperature altermagnets are suggested to host significant potential applications. RuO2 has been proposed as the most promising candidate. However, recently, there is intense debate about whether RuO2 exhibits magnetic order or not. Experiments by several different technologies claim the collinear magnetic order and spin-splitting-induced effects. However, very recent muon spin resonance (μSR) results reveal no magnetic order in RuO2, which indicates that the time-reversal symmetry is not broken. Direct observation of the high-resolution bulk band structure is absent to date but essential to investigate the electronic structure of RuO2. In this study, utilizing soft x-ray angle-resolved photoemission spectroscopy, we report systematic direct experimental observation of bulk band structure of RuO2.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B
volume
111
issue
13
article number
134450
publisher
American Physical Society
external identifiers
  • scopus:105004258594
ISSN
2469-9950
DOI
10.1103/PhysRevB.111.134450
language
English
LU publication?
yes
id
84024558-ae08-4f4d-9f68-4469c8bcec04
date added to LUP
2025-08-13 12:39:59
date last changed
2025-10-14 12:21:51
@article{84024558-ae08-4f4d-9f68-4469c8bcec04,
  abstract     = {{<p>Altermagnetism exhibits unique physical properties such as spin-momentum locking, anomalous Hall effect, nontrivial topological phase, and giant magnetoresistance. Among all the predicted candidates, several room-temperature altermagnets are suggested to host significant potential applications. RuO2 has been proposed as the most promising candidate. However, recently, there is intense debate about whether RuO2 exhibits magnetic order or not. Experiments by several different technologies claim the collinear magnetic order and spin-splitting-induced effects. However, very recent muon spin resonance (μSR) results reveal no magnetic order in RuO2, which indicates that the time-reversal symmetry is not broken. Direct observation of the high-resolution bulk band structure is absent to date but essential to investigate the electronic structure of RuO2. In this study, utilizing soft x-ray angle-resolved photoemission spectroscopy, we report systematic direct experimental observation of bulk band structure of RuO2.</p>}},
  author       = {{Lin, Zihan and Chen, Dong and Lu, Wenlong and Liang, Xin and Feng, Shiyu and Yamagami, Kohei and Osiecki, Jacek and Leandersson, Mats and Thiagarajan, Balasubramanian and Liu, Junwei and Felser, Claudia and Ma, Junzhang}},
  issn         = {{2469-9950}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{13}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review B}},
  title        = {{Bulk band structure of Ru O2 measured with soft x-ray angle-resolved photoemission spectroscopy}},
  url          = {{http://dx.doi.org/10.1103/PhysRevB.111.134450}},
  doi          = {{10.1103/PhysRevB.111.134450}},
  volume       = {{111}},
  year         = {{2025}},
}