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Robust topological surface states in skyrmion-host magnets Eu(Ga,Al) 4 : Evidence for dual topology
Yuki Arai, Kosuke Nakayama, Takemi Kato, Tomonori Nakamura, Asuka Honma, Seigo Souma, Kenichi Ozawa, Kiyohisa Tanaka, Daisuke Shiga, Hiroshi Kumigashira, Yoshinori Okada, Kouji Segawa, Takafumi Sato
Physical Review B 2026/07/07
DOI：
10.1103/5hbm-g33v
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Realization of strongly correlated 2D honeycomb boron
Takemi Kato, Tomonori Nakamura, Kosuke Nakayama, Takumi Osumi, Seigo Souma, Asuka Honma, Alexandre Antezak, Pedro Rezende Gonçalves, Kiyohisa Tanaka, Miho Kitamura, Kenichi Ozawa, Koji Horiba, Hiroshi Kumigashira, Takashi Takahashi, Franck Fortuna, Andrés Felipe Santander-Syro, Rikio Settai, Yoshichika Onuki, Yoshinori Okada, Takafumi Sato
Science Advances 2026/07/03
DOI：
10.1126/sciadv.aee3116
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Origin of multiple skyrmion phases in EuAl4
Peer-reviewed
Yuki Arai, Kosuke Nakayama, Asuka Honma, Seigo Souma, Daisuke Shiga, Hiroshi Kumigashira, Takashi Takahashi, Kouji Segawa, Takafumi Sato
Nature Communications 2026/04/13
DOI：
10.1038/s41467-026-71020-y
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Spin-degenerate bulk bands and topological surface states associated with Dirac nodal lines in RuO2
Peer-reviewed
Takumi Osumi, Kunihiko Yamauchi, Seigo Souma, Shubhankar Paul, Asuka Honma, Kosuke Nakayama, Kenichi Ozawa, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira, Chiara Bigi, François Bertran, Tamio Oguchi, Takashi Takahashi, Yoshiteru Maeno, Takafumi Sato
Physical Review B 2026/02/10
DOI：
10.1103/wvs6-hqfv
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Universal role of combined symmetry for the protection of the Dirac cone in antiferromagnetic topological insulators
Peer-reviewed
Asuka Honma, Noriyuki Kabeya, Seigo Souma, Yongjian Wang, Kunihiko Yamauchi, Kosuke Nakayama, Daichi Takane, Kenichi Ozawa, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira, Tamio Oguchi, Takashi Takahashi, Noriaki Kimura, Yoichi Ando, Takafumi Sato
Physical Review B 2024/09/26
DOI：
10.1103/physrevb.110.115152
ISSN：
2469-9950 2469-9969
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Observation of a giant band splitting in altermagnetic MnTe
Peer-reviewed
T. Osumi, S. Souma, T. Aoyama, K. Yamauchi, A. Honma, K. Nakayama, T. Takahashi, K. Ohgushi, T. Sato
Physical Review B 2024/03/01
DOI：
10.1103/physrevb.109.115102
ISSN：
2469-9950 2469-9969
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Antiferromagnetic topological insulator with selectively gapped Dirac cones
Peer-reviewed
A. Honma, D. Takane, seigo souma, K. Yamauchi, Y. Wang, Kosuke Nakayama, Katsuaki Sugawara, M. Kitamura, K. Horiba, Hiroshi KUMIGASHIRA, Kiyohisa TANAKA, Timur Kim, Cephise Cacho, T. Oguchi, T. Takahashi, Yoichi Ando, Takafumi Sato
Nature Communications 2023/11/17
DOI：
10.1038/s41467-023-42782-6
ISSN：
2041-1723
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Unusual surface states associated with PT-symmetry breaking and antiferromagnetic band folding in NdSb
Peer-reviewed
Asuka Honma, Daichi Takane, seigo souma, Yongjian Wang, Kosuke Nakayama, Miho Kitamura, Koji Horiba, Hiroshi KUMIGASHIRA, Takashi Takahashi, Yoichi Ando, Takafumi Sato
Physical Review B 2023/09/11
DOI：
10.1103/physrevb.108.115118
ISSN：
2469-9950 2469-9969
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Direct Imaging of Band Structure for Powdered Rhombohedral Boron Monosulfide by Microfocused ARPES
Peer-reviewed
Katsuaki Sugawara, Haruki Kusaka, Tappei Kawakami, Koki Yanagizawa, Asuka Honma, Seigo Souma, Kosuke Nakayama, Masashi Miyakawa, Takashi Taniguchi, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira, Takashi Takahashi, Shin-ichi Orimo, Masayuki Toyoda, Susumu Saito, Takahiro Kondo, Takafumi Sato
Nano Letters 2023/03/08
DOI：
10.1021/acs.nanolett.2c04048
ISSN：
1530-6984 1530-6992
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Development of a versatile micro-focused angle-resolved photoemission spectroscopy system with Kirkpatrick–Baez mirror optics
Peer-reviewed
Miho Kitamura, Seigo Souma, Asuka Honma, Daisuke Wakabayashi, Hirokazu Tanaka, Akio Toyoshima, Kenta Amemiya, Tappei Kawakami, Katsuaki Sugawara, Kosuke Nakayama, Kohei Yoshimatsu, Hiroshi Kumigashira, Takafumi Sato, Koji Horiba
Review of Scientific Instruments 2022/03/01
DOI：
10.1063/5.0074393
ISSN：
0034-6748 1089-7623
https://orcid.org/0009-0000-5972-209X