Coherence Factors and Quantum Interferences in Excitonic Condensation of Ta2NiSe5

Koudai Sugimoto, Tatsuya Kaneko, Yukinori Ohta

Research output: Contribution to journalConference articlepeer-review


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
Issue number11
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

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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