Photoinduced phase transition from excitonic insulator to semimetal-like state in Ta2Ni1−xCoxSe5 (x = 0.10)

Takumi Mitsuoka, Takeshi Suzuki, Hidenori Takagi, Naoyuki Katayama, Hiroshi Sawa, Minoru Nohara, Mari Watanabe, Jiadi Xu, Qianhui Ren, Masami Fujisawa, Teruto Kanai, Jiro Itatani, Shik Shin, Kozo Okazaki, Takashi Mizokawa

研究成果: Article査読

抄録

We report time-resolved angle-resolved photoemission study on Ta2Ni1xCoxSe5 (x = 0.10) in which the excitonic insulator (EI) transition temperature is reduced by Co substitution for Ni. In the photoinduced phase, the conduction band is clearly observed and the energy gap between the conduction and valence bands is undetectably small within the energy resolution. Assuming that the energy gap is closed, the conduction band crosses or overlaps with the valence band near the Fermi level resembling a nodal semimetal.

本文言語English
論文番号124703
ジャーナルjournal of the physical society of japan
89
12
DOI
出版ステータスPublished - 2020 12 15

ASJC Scopus subject areas

  • 物理学および天文学(全般)

フィンガープリント

「Photoinduced phase transition from excitonic insulator to semimetal-like state in Ta<sub>2</sub>Ni<sub>1−x</sub>Co<sub>x</sub>Se<sub>5</sub> (x = 0.10)」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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