Shintaro Adachi
Hirosaki University
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Publication
Featured researches published by Shintaro Adachi.
Journal of the Physical Society of Japan | 2014
Tomohiro Usui; Daiki Fujiwara; Shintaro Adachi; Hironobu Kudo; Kosuke Murata; Haruki Kushibiki; Takao Watanabe; Kazutaka Kudo; Terukazu Nishizaki; Norio Kobayashi; Shojiro Kimura; K. Yamada; Tomoyuki Naito; Takashi Noji; Yoji Koike
To investigate the relationship between the pseudogap and superconductivity, we measured both the in-plane (ρab) and out-of-plane (ρc) resistivity for oxygen-controlled Bi2Sr2CaCu2O8+δ single crystals subject to magnetic fields (parallel to the c-axis) of up to 17.5 T. The onset temperature for the superconductive fluctuation, Tscf, is determined by the large positive in-plane magnetoresistance (MR) and negative out-of-plane MR observed near Tc, whereas the pseudogap opening temperature T* is determined by the semiconductive upturn of the zero-field ρc. Tscf was found to scale roughly as Tc, with a decreasing temperature interval between them upon doping. On the other hand, T* starts out much higher than Tscf but decreases monotonically upon doping; finally, at a heavily overdoped state, it is not observed above Tscf. These results imply that the pseudogap is not a simple precursor of superconductivity, but that further study is needed to determine whether or not T* exists below Tscf in the heavily overdo...
Physical Review Letters | 2017
So Kunisada; Shintaro Adachi; Shiro Sakai; Nae Sasaki; M. Nakayama; Shuntaro Akebi; Kenta Kuroda; T. Sasagawa; Takao Watanabe; Shik Shin; Takeshi Kondo
Using a laser-excited angle-resolved photoemission spectroscopy capable of bulk sensitive and high-energy resolution measurements, we reveal a new phenomenon of superconductors in the optimally doped trilayer Bi_{2}Sr_{2}Ca_{2}Cu_{3}O_{10+δ}. We observe a hybridization of the Bogoliubov bands derived from the inner and outer CuO_{2} planes with different magnitudes of energy gaps. Our data clearly exhibit the splitting of coherent peaks and the consequent enhancement of spectral gaps. These features are reproduced by model calculations, which indicate that the gap enhancement extends over a wide range of Fermi surface up to the antinode. The significant modulation of electron pairing uncovered here might be a crucial factor to achieve the highest critical temperature in the trilayer cuprates.
Physical Review B | 2016
Takao Watanabe; Tomohiro Usui; Shintaro Adachi; Yuki Teramoto; Mihaly M. Dobroka; Itsuhiro Kakeya; Akihiro Kondo; Koichi Kindo; Shojiro Kimura
To elucidate the pseudogap phase diagram including the overdoped state of high transition temperature (high-
Physical Review B | 2016
Takao Watanabe; Tomohiro Usui; Shintaro Adachi; Yuki Teramoto; Mihaly M. Dobroka; Itsuhiro Kakeya; Akihiro Kondo; Koichi Kindo; Shojiro Kimura
T_c
Physical Review B | 2016
Takao Watanabe; Tomohiro Usui; Shintaro Adachi; Yuki Teramoto; Mihaly M. Dobroka; Itsuhiro Kakeya; Akihiro Kondo; Koichi Kindo; Shojiro Kimura
) cuprates, we must understand the origin of the positive out-of-plane magnetoconductivity (MC) observed in these compounds. For this purpose, the out-of-plane resistivity
Journal of the Physical Society of Japan | 2015
Shintaro Adachi; Tomohiro Usui; Yasuhito Ito; Hironobu Kudo; Haruki Kushibiki; Kosuke Murata; Takao Watanabe; Kazutaka Kudo; Terukazu Nishizaki; Norio Kobayashi; Shojiro Kimura; Masaki Fujita; K. Yamada; Takashi Noji; Yoji Koike; Takenori Fujii
\rho_c(T,H)
Physics Procedia | 2015
Shintaro Adachi; Tomohiro Usui; K. Takahashi; K. Kosugi; Takao Watanabe; Terukazu Nishizaki; T. Adachi; Shojiro Kimura; Kentaro Sato; K. Suzuki; Masaki Fujita; Kazuyoshi Yamada; Takenori Fujii
of an overdoped Bi
arXiv: Superconductivity | 2018
Shintaro Adachi; Ryo Matsumoto; Hiroshi Hara; Yoshito Saito; Peng Song; Hiroyuki Takeya; Takao Watanabe; Yoshihiko Takano
_{1.6}
arXiv: Superconductivity | 2018
Hiroshi Hara; Shintaro Adachi; Ryo Matsumoto; Aichi Yamashita; Hiroyuki Takeya; Yoshihiko Takano
Pb
The Japan Society of Applied Physics | 2018
Ryo Matsumoto; Aichi Yamashita; Hiroshi Hara; Shintaro Adachi; Tetsuo Irifune; Hiromi Tanaka; Hiroyuki Takeya; Yoshihiko Takano
_{0.4}