Abstract
The mechanism of superconductivity in Pr2 Ba4 Cu7 O15-δ is studied using a quasi-one-dimensional double chain model with appropriate hopping integrals, on-site U, and off-site repulsion V1. Applying the fluctuation exchange method to this model and solving the Eliashberg's equation, we obtain the doping dependence of superconductivity that is consistent with the experiments. The superconducting gap has a spin singlet symmetry with the nodes of the gap running between the disconnected Fermi surfaces, which gives a temperature dependence of the spin-lattice relaxation rate that does not contradict with the experimental results.
| Original language | English |
|---|---|
| Article number | 014515 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 76 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jul 24 2007 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Superconductivity due to spin fluctuations originating from multiple Fermi surfaces in the double chain superconductor Pr2 Ba4 Cu7 O15-δ. / Nakano, Tsuguhito; Kuroki, Kazuhiko; Onari, Seiichiro.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 76, No. 1, 014515, 24.07.2007.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Superconductivity due to spin fluctuations originating from multiple Fermi surfaces in the double chain superconductor Pr2 Ba4 Cu7 O15-δ
AU - Nakano, Tsuguhito
AU - Kuroki, Kazuhiko
AU - Onari, Seiichiro
PY - 2007/7/24
Y1 - 2007/7/24
N2 - The mechanism of superconductivity in Pr2 Ba4 Cu7 O15-δ is studied using a quasi-one-dimensional double chain model with appropriate hopping integrals, on-site U, and off-site repulsion V1. Applying the fluctuation exchange method to this model and solving the Eliashberg's equation, we obtain the doping dependence of superconductivity that is consistent with the experiments. The superconducting gap has a spin singlet symmetry with the nodes of the gap running between the disconnected Fermi surfaces, which gives a temperature dependence of the spin-lattice relaxation rate that does not contradict with the experimental results.
AB - The mechanism of superconductivity in Pr2 Ba4 Cu7 O15-δ is studied using a quasi-one-dimensional double chain model with appropriate hopping integrals, on-site U, and off-site repulsion V1. Applying the fluctuation exchange method to this model and solving the Eliashberg's equation, we obtain the doping dependence of superconductivity that is consistent with the experiments. The superconducting gap has a spin singlet symmetry with the nodes of the gap running between the disconnected Fermi surfaces, which gives a temperature dependence of the spin-lattice relaxation rate that does not contradict with the experimental results.
UR - http://www.scopus.com/inward/record.url?scp=34547114248&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34547114248&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.76.014515
DO - 10.1103/PhysRevB.76.014515
M3 - Article
AN - SCOPUS:34547114248
VL - 76
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 1
M1 - 014515
ER -