Výsledky vyhledávání - "Kozo Okazaki"

Akademický článek

Testing electron–phonon coupling for the superconductivity in kagome metal CsV3Sb5

Autor: Yigui Zhong, Shaozhi Li, Hongxiong Liu, Yuyang Dong, Kohei Aido, Yosuke Arai, Haoxiang Li, Weilu Zhang, Youguo Shi, Ziqiang Wang, Shik Shin, H. N. Lee, H. Miao, Takeshi Kondo, Kozo Okazaki

Publikováno v: Nature Communications, Vol 14, Iss 1, Pp 1-7 (2023)

Electron-phonon coupling is thought to be too weak to be responsible for the superconducting Cooper pairing of the kagome metals AV3Sb5, but an experimental measurement is lacking. Here, the authors use ARPES measurements to find that electron-phonon

Externí odkaz: https://doaj.org/article/abcfbcc6960c4da3bd28cafd248d1a04

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Nodeless electron pairing in CsV3Sb5-derived kagome superconductors

Publikováno v: Nature. 617:488-492

The newly discovered kagome superconductors represent a promising platform for investigating the interplay between band topology, electronic order, and lattice geometry. Despite extensive research efforts on this system, the nature of the superconduc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a5563b23a6af5e5333a42124b4ee54a3
https://doi.org/10.1038/s41586-023-05907-x

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Akademický článek

Photo-induced semimetallic states realised in electron–hole coupled insulators

Autor: Kozo Okazaki, Yu Ogawa, Takeshi Suzuki, Takashi Yamamoto, Takashi Someya, Shoya Michimae, Mari Watanabe, Yangfan Lu, Minoru Nohara, Hidenori Takagi, Naoyuki Katayama, Hiroshi Sawa, Masami Fujisawa, Teruto Kanai, Nobuhisa Ishii, Jiro Itatani, Takashi Mizokawa, Shik Shin

Publikováno v: Nature Communications, Vol 9, Iss 1, Pp 1-6 (2018)

Ultrafast light pulses can manipulate and probe materials faster than relaxation timescales, leading to new electronic states and insights into equilibrium properties. Okazaki et al. use the properties of photo-induced metallic states to investigate

Externí odkaz: https://doaj.org/article/f2e9902e1eb8483fa4edf3837980393c

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Akademický článek

Superconducting gap anisotropy sensitive to nematic domains in FeSe

Autor: Takahiro Hashimoto, Yuichi Ota, Haruyoshi Q. Yamamoto, Yuya Suzuki, Takahiro Shimojima, Shuntaro Watanabe, Chuangtian Chen, Shigeru Kasahara, Yuji Matsuda, Takasada Shibauchi, Kozo Okazaki, Shik Shin

Publikováno v: Nature Communications, Vol 9, Iss 1, Pp 1-7 (2018)

The superconducting gap structure of FeSe remains a debated issue. Here, Hashimoto et al. report momentum dependence of the gap in single- and multi-domain regions of orthorhombic FeSe crystals, revealing an unusual node lifting of the gap structure

Externí odkaz: https://doaj.org/article/59a00507e1944665b7dd3ebe06de70d1

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Akademický článek

Ultrafast optical stress on BaFe_{2}As_{2}

Autor: Takeshi Suzuki, Yuya Kubota, Asuka Nakamura, Takahiro Shimojima, Kou Takubo, Suguru Ito, Kohei Yamamoto, Shoya Michimae, Hikaru Sato, Hidenori Hiramatsu, Hideo Hosono, Tadashi Togashi, Makina Yabashi, Hiroki Wadati, Iwao Matsuda, Shik Shin, Kozo Okazaki

Publikováno v: Physical Review Research, Vol 3, Iss 3, p 033222 (2021)

We investigate the ultrafast lattice dynamics in BaFe_{2}As_{2} via time-resolved x-ray diffraction measurements using an x-ray free-electron laser at SPring-8 Angstrom Compact free-electron LAser (SACLA). The profile of the Bragg peaks substantially

Externí odkaz: https://doaj.org/article/d74d0121672c4cf5830becd1397d4c38

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Phase-resolved frequency-domain analysis of the photoemission spectra for photoexcited 1T-TaS2 in the Mott insulating charge density wave state

Autor: Qianhui Ren, Takeshi Suzuki, Teruto Kanai, Jiro Itatani, Shik Shin, Kozo Okazaki

Publikováno v: Applied Physics Letters. 122

We investigate the nonequilibrium electronic structure of 1T-TaS2 by time- and angle-resolved photoemission spectroscopy. We observe that strong photoexcitation induces the collapse of the Mott gap, leading to the photo-induced metallic phase. It is

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1325592108d612e6b734ca50f864ed8b
https://doi.org/10.1063/5.0149692

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Discovery of nematic Bogoliubov Fermi surface in an iron-chalcogenide superconductor

Autor: Tsubaki Nagashima, Takahiro Hashimoto, Sahand Najafzadeh, Shin-ichiro Ouchi, Takeshi Suzuki, Akiko Fukushima, Shigeru Kasahara, Kohei Matsuura, Mingwei Qiu, Yuta Mizukami, Kenichiro Hashimoto, Yuji Matsuda, Takasada Shibauchi, Shik Shin, Kozo Okazaki

Bogoliubov Fermi surface (BFS) is an unprecedented superconducting gap structure in which the nodal (zero-gap) region forms a two-dimensional surface rather than a line or point. Tetragonal Fe(Se,S) having a large residual density of states is a cand

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c690040338394673ec3661211ad1183a
https://doi.org/10.21203/rs.3.rs-2224728/v1

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