Zihan Lin¹, Dong Chen^2,3, Wenlong Lu¹, Xin Liang¹, Shiyu Feng¹, Kohei Yamagami⁴, Jacek Osiecki⁵, Mats Leandersson⁵, Balasubramanian Thiagarajan⁵, Junwei Liu⁶, Claudia Felser³, Junzhang Ma^1,7*

1 Department of Physics, City University of Hong Kong, Kowloon, Hong Kong, China

2 College of Physics, Qingdao University, Qingdao 266071, China

3 Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany

4 Japan Synchrotron Radiation Research Institute, 1-1-1, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan

5 MAX IV Laboratory, Fotongatan 8, 22484 Lund, Sweden

6 Department of Physics, The Hong Kong University of Science and Technology, Hong Kong, China

7 City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China

* Corresponding authors emails: junzhama@cityu.edu.hk

DOI10.24435/materialscloud:q2-5t [version v1]

Publication date: Mar 28, 2025

How to cite this record

Zihan Lin, Dong Chen, Wenlong Lu, Xin Liang, Shiyu Feng, Kohei Yamagami, Jacek Osiecki, Mats Leandersson, Balasubramanian Thiagarajan, Junwei Liu, Claudia Felser, Junzhang Ma, Bulk band structure of RuO₂ measured with soft X-ray angle-resolved photoemission spectroscopy, Materials Cloud Archive 2025.48 (2025), https://doi.org/10.24435/materialscloud:q2-5t

Description

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 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 up to date, but essential to investigate the electronic structure of RuO₂. In this study, utilizing soft X-ray ARPES, we report systematic direct experimental observation of bulk band structure of RuO₂. We observed signature of bulk band splitting induced by unknown symmetry broken. The ARPES data and calculated band structureare attached in this record.

Materials Cloud sections using this data

Files

File name	Size	Description
fig1.zip MD5md5:a051528f012d32fe27ded7824067e5f4	408.3 KiB	Fig1
fig2.zip MD5md5:50ab38a736d4b626c8dbf3f74ba89369	2.2 MiB	Fig2
fig3.zip MD5md5:66ce5827dee8a5d64589bb09b8d1276f	14.5 MiB	Fig3
fig4.zip MD5md5:a91a90f9d24783126ab18e1250cea691	15.7 MiB	Fig4
S1.zip MD5md5:6a4363c78e83be56baacc0eedd3cf964	3.2 MiB	S1
S2.zip MD5md5:04a98860b8f80aecc696057748b509fb	552.7 KiB	S2
S3.zip MD5md5:b0c134b08650e8a81c399bbc0278e83d	320.3 KiB	S3
S4.zip MD5md5:c7774e4f6ca3821af9bee1dbd4b2230b	1004.8 KiB	S4
README.txt MD5md5:a412748ea27ab2fbd598e6228fff52ce	668 Bytes	readme

License

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External references

Keywords

Angle-resolved photoemission spectroscopy Band structure Magnetism