First- and second-order phase transitions between the uniform and FFLO excitonic states in the three-chain Hubbard model for Ta2NiSe5
Kaoru Domon, Takemi Yamada, Yoshiaki \=Ono
TL;DR
This paper investigates phase transitions between uniform and FFLO excitonic states in Ta2NiSe5 using a three-chain Hubbard model, predicting observable changes under high pressure.
Contribution
It introduces a theoretical analysis of phase transitions in Ta2NiSe5, focusing on the novel FFLO excitonic states and their thermodynamic properties.
Findings
Identification of phase transitions between uniform and FFLO states
Prediction of experimental signatures under high pressure
Analysis of thermodynamic stability of excitonic phases
Abstract
We examine the free energy and the thermodynamic properties in the three-chain Hubbard model for Ta2NiSe5 to clarify the phase transitions between the uniform and the FFLO excitonic states which are expected to be observed in Ta2NiSe5 under high pressure.
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