K
Kenji Yonemitsu
Researcher at Chuo University
Publications - 226
Citations - 2342
Kenji Yonemitsu is an academic researcher from Chuo University. The author has contributed to research in topics: Hubbard model & Phase transition. The author has an hindex of 26, co-authored 219 publications receiving 2215 citations. Previous affiliations of Kenji Yonemitsu include National Institutes of Natural Sciences, Japan & International Centre for Theoretical Physics.
Papers
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Journal ArticleDOI
Theory of photoinduced phase transitions in itinerant electron systems
Kenji Yonemitsu,Keiichiro Nasu +1 more
TL;DR: Theoretical progress in the research of photo-induced phase transitions is reviewed with closely related experiments in this paper, where the dynamics of the ionic-to-neutral transition are characterized by a threshold behavior, while those of the neutral-toionic transition by an almost linear behavior.
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Photoinduced change in the charge order pattern in the quarter-filled organic conductor (EDO-TTF)2PF6 with a strong electron-phonon interaction.
Ken Onda,Sho Ogihara,Kenji Yonemitsu,Nobuya Maeshima,Tadahiko Ishikawa,Yoichi Okimoto,Xiangfeng Shao,Yoshiaki Nakano,Hideki Yamochi,Gunzi Saito,Shin-ya Koshihara +10 more
TL;DR: The transient optical conductivity spectrum over a wide probe photon-energy range revealed that photoexcitation induced a new type of charge-disproportionate state.
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Coexistence of SDW and Purely-Electronic CDW in Quarter-Filled Organic Conductors
TL;DR: In this paper, the ground state of a modified Hubbard model of a quarter-filled one-dimensional chain was determined by a mean field calculation in order to determine the ground states of the chain in terms of holes.
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Early-stage dynamics of light-matter interaction leading to the insulator-to-metal transition in a charge ordered organic crystal.
Y. Kawakami,T. Fukatsu,Y. Sakurai,H. Unno,H. Itoh,Shinichiro Iwai,Takahiko Sasaki,Kaoru Yamamoto,Kyuya Yakushi,Kenji Yonemitsu +9 more
TL;DR: The results indicated a crucial role for electron-electron interplay in the light-matter interaction leading to the photoinduced insulator-to-metal transition.
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Optical freezing of charge motion in an organic conductor.
Takahiro Ishikawa,Yuto Sagae,Y. Naitoh,Y. Kawakami,H. Itoh,Kaoru Yamamoto,Kyuya Yakushi,Hideo Kishida,Takahiko Sasaki,Sumio Ishihara,Yasuhiro Tanaka,Kenji Yonemitsu,Shinichiro Iwai +12 more
TL;DR: This optical freezing of charges, which is the reverse of the photoinduced melting of electronic orders, is attributed to the ~10% reduction of t driven by the strong, high-frequency (ω ≧ t/ħ) electric field.