TY - JOUR
T1 - Microscopic quantum interference in excitonic condensation of Ta2NiSe5
AU - Sugimoto, Koudai
AU - Kaneko, Tatsuya
AU - Ohta, Yukinori
N1 - Publisher Copyright:
© 2016 American Physical Society.
PY - 2016/1/15
Y1 - 2016/1/15
N2 - The microscopic quantum interference associated with excitonic condensation in Ta2NiSe5 is studied in a BCS-type mean-field approximation. We show that in ultrasonic attenuation the coherence peak appears just below the transition temperature Tc, whereas in NMR spin-lattice relaxation the rate rapidly decreases below Tc; these observations can offer a crucial experimental test for the validity of the excitonic condensation scenario in Ta2NiSe5. We also show that excitonic condensation manifests itself in a jump of the heat capacity at Tc as well as in a softening of the elastic shear constant, in accordance with the second-order phase transition observed in Ta2NiSe5.
AB - The microscopic quantum interference associated with excitonic condensation in Ta2NiSe5 is studied in a BCS-type mean-field approximation. We show that in ultrasonic attenuation the coherence peak appears just below the transition temperature Tc, whereas in NMR spin-lattice relaxation the rate rapidly decreases below Tc; these observations can offer a crucial experimental test for the validity of the excitonic condensation scenario in Ta2NiSe5. We also show that excitonic condensation manifests itself in a jump of the heat capacity at Tc as well as in a softening of the elastic shear constant, in accordance with the second-order phase transition observed in Ta2NiSe5.
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U2 - 10.1103/PhysRevB.93.041105
DO - 10.1103/PhysRevB.93.041105
M3 - Article
AN - SCOPUS:84955296782
VL - 93
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 2469-9950
IS - 4
M1 - 041105
ER -