Coherence Factors and Quantum Interferences in Excitonic Condensation of Ta2NiSe5

Koudai Sugimoto, Tatsuya Kaneko, Yukinori Ohta

Research output: Contribution to journalConference article

Abstract

In order to elucidate whether Ta2NiSe5 is in an excitonic condensation state or not, we study macroscopic quantum interferences in ultrasonic attenuation rate and nuclear magnetic resonance relaxation rate. Using the three-chain model describing the excitonic condensation of Ta2NiSe5, we demonstrate analytically that the ultrasonic attenuation rate shows a characteristic peak just below the transition temperature of the excitonic condensation, while the nuclear magnetic resonance relaxation rate shows a rapid drop. In particular, we find that the constructive interference originates from the hybridization between the conduction and valence bands induced by an external field.

Original languageEnglish
Article number112001
JournalJournal of Physics: Conference Series
Volume807
Issue number11
DOIs
Publication statusPublished - 2017 Apr 6
Externally publishedYes
Event18th International Conference on Strongly Correlated Electron Systems, SCES 2016 - Hangzhou, China
Duration: 2016 May 92016 May 13

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condensation
interference
ultrasonics
attenuation
nuclear magnetic resonance
conduction bands
transition temperature
valence

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Coherence Factors and Quantum Interferences in Excitonic Condensation of Ta2NiSe5. / Sugimoto, Koudai; Kaneko, Tatsuya; Ohta, Yukinori.

In: Journal of Physics: Conference Series, Vol. 807, No. 11, 112001, 06.04.2017.

Research output: Contribution to journalConference article

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