Abstract
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.
| Original language | English |
|---|---|
| Article number | 041105 |
| Journal | Physical Review B |
| Volume | 93 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2016 Jan 15 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Microscopic quantum interference in excitonic condensation of Ta2NiSe5. / Sugimoto, Koudai; Kaneko, Tatsuya; Ohta, Yukinori.
In: Physical Review B, Vol. 93, No. 4, 041105, 15.01.2016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Microscopic quantum interference in excitonic condensation of Ta2NiSe5
AU - Sugimoto, Koudai
AU - Kaneko, Tatsuya
AU - Ohta, Yukinori
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.
UR - http://www.scopus.com/inward/record.url?scp=84955296782&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84955296782&partnerID=8YFLogxK
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 -