Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Tappei Kawakami"'
Autor:
Tappei Kawakami, Katsuaki Sugawara, Hirofumi Oka, Kosuke Nakayama, Ken Yaegashi, Seigo Souma, Takashi Takahashi, Tomoteru Fukumura, Takafumi Sato
Publikováno v:
npj 2D Materials and Applications, Vol 7, Iss 1, Pp 1-9 (2023)
Abstract Fermi-surface (FS) nesting originating from Peierls’ idea of electronic instabilities in one-dimensional materials is a key concept to stabilize charge-density wave (CDW), whereas its applicability to two-dimensional (2D) materials is unde
Externí odkaz:
https://doaj.org/article/a63f8c5a2a7a4e58bd416305952e73ed
Autor:
Yasuaki Saruta, Katsuaki Sugawara, Hirofumi Oka, Tappei Kawakami, Takemi Kato, Kosuke Nakayama, Seigo Souma, Takashi Takahashi, Tomoteru Fukumura, Takafumi Sato
Publikováno v:
Advanced Science, Vol 10, Iss 34, Pp n/a-n/a (2023)
Abstract A current key challenge in 2D materials is the realization of emergent quantum phenomena in hetero structures via controlling the moiré potential created by the periodicity mismatch between adjacent layers, as highlighted by the discovery o
Externí odkaz:
https://doaj.org/article/fecf872ce6004f90aa520326fad8263b
Autor:
Takemi Kato, Yongkai Li, Tappei Kawakami, Min Liu, Kosuke Nakayama, Zhiwei Wang, Ayumi Moriya, Kiyohisa Tanaka, Takashi Takahashi, Yugui Yao, Takafumi Sato
Publikováno v:
Communications Materials, Vol 3, Iss 1, Pp 1-9 (2022)
Kagome metals are interesting for the coexistence of chiral charge density wave and superconductivity. Here, the structural distortion responsible for the charge density wave in KV3Sb5 is investigated by angle-resolved photoemission spectroscopy and
Externí odkaz:
https://doaj.org/article/db05f4aa30e0483cada97135c555d2f2
Autor:
Daichi Takane, Yuya Kubota, Kosuke Nakayama, Tappei Kawakami, Kunihiko Yamauchi, Seigo Souma, Takemi Kato, Katsuaki Sugawara, Shin-ichiro Ideta, Kiyohisa Tanaka, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira, Tamio Oguchi, Takashi Takahashi, Kouji Segawa, Takafumi Sato
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
Abstract Topological Dirac semimetals (TDSs) offer an excellent opportunity to realize outstanding physical properties distinct from those of topological insulators. Since TDSs verified so far have their own problems such as high reactivity in the at
Externí odkaz:
https://doaj.org/article/62fe5cd682e940e6b7053ea305fc94d9
Autor:
Yuki Nakata, Katsuaki Sugawara, Ashish Chainani, Hirofumi Oka, Changhua Bao, Shaohua Zhou, Pei-Yu Chuang, Cheng-Maw Cheng, Tappei Kawakami, Yasuaki Saruta, Tomoteru Fukumura, Shuyun Zhou, Takashi Takahashi, Takafumi Sato
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)
Monolayer transition metal dechalcogenides are a promising platform to study the interplay of low-dimensionality and electron correlations. Here, the authors report a Mott insulator state in monolayer 1T-TaSe2, that survives far above room temperatur
Externí odkaz:
https://doaj.org/article/a9f838660dbb4828873bdd831de6eb96
Autor:
Ayumi Moriya, Kosuke Nakayama, Tappei Kawakami, Kensaku Maeda, Atsuya Tokuyama, Seigo Souma, Chaoyu Chen, José Avila, Maria Carmen Asensio, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira, Takashi Takahashi, Kozo Fujiwara, Kouji Segawa, Takafumi Sato
Publikováno v:
Physical Review Research, Vol 5, Iss 2, p 023152 (2023)
We have performed micro-/nanofocused angle-resolved photoemission spectroscopy (ARPES) on cleaved single-crystal surfaces of bismuth to clarify the spatially resolved electronic states. While the dominant area of the cleaved surface was found to disp
Externí odkaz:
https://doaj.org/article/d650112bf7d5439ea270bfd2c7d6b0b7
Autor:
Takafumi Sato, Zhiwei Wang, Daichi Takane, Seigo Souma, Chaoxi Cui, Yongkai Li, Kosuke Nakayama, Tappei Kawakami, Yuya Kubota, Cephise Cacho, Timur K. Kim, Arian Arab, Vladimir N. Strocov, Yugui Yao, Takashi Takahashi
Publikováno v:
Physical Review Research, Vol 2, Iss 3, p 033342 (2020)
We have performed angle-resolved photoemission spectroscopy on EuIn_{2}As_{2} which is predicted to be an axion insulator in the antiferromagnetic state. By utilizing soft-x-ray and vacuum-ultraviolet photons, we revealed a three-dimensional hole poc
Externí odkaz:
https://doaj.org/article/f2ad18ed30874dd98c43549451d0655a
Autor:
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
Publikováno v:
Nano Letters. 23:1673-1679
Autor:
Taiki Taguchi, Katsuaki Sugawara, Hirofumi Oka, Tappei Kawakami, Yasuaki Saruta, Takemi Kato, Kosuke Nakayama, Seigo Souma, Takashi Takahashi, Tomoteru Fukumura, Takafumi Sato
Interplay between fermiology and electron correlation is crucial for realizing exotic quantum phases. Transition-metal dichalcogenide (TMD) 1T-TaS2 has sparked a tremendous attention owing to its unique Mott-insulating phase coexisting with the charg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13f39e1a3d999ecf5d5f16dc083b3bf2
http://arxiv.org/abs/2212.12853
http://arxiv.org/abs/2212.12853
Autor:
Cheng Maw Cheng, Takashi Takahashi, Shuyun Zhou, Changhua Bao, Tomoteru Fukumura, Ashish Chainani, Katsuaki Sugawara, Hirofumi Oka, Takafumi Sato, Pei Yu Chuang, Shaohua Zhou, Yuki Nakata, Yasuaki Saruta, Tappei Kawakami
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)
Combination of low-dimensionality and electron correlation is vital for exotic quantum phenomena such as the Mott-insulating phase and high-temperature superconductivity. Transition-metal dichalcogenide (TMD) 1T-TaS2 has evoked great interest owing t