TY - JOUR
T1 - Odd-frequency superconductivity on the Hubbard model using the FLEX approximation
AU - Shimokaji, Yuichiro
AU - Onari, Seiichiro
AU - Tanaka, Yukio
AU - Miyake, Kazumasa
PY - 2008/12
Y1 - 2008/12
N2 - It is an important issue to clarify whether the odd-frequency superconducting state can be derived from microscopic Hamiltonian or not, where gap function has an odd-parity in frequency. We study the instability of following four superconducting states: (1) even-frequency spin-singlet, (2) even-frequency spin-triplet, (3) odd-frequency spin-singlet and (4) odd-frequency spin-triplet. By using the fluctuation exchange (FLEX) approximation on a triangular and square lattice, we find that the odd-frequency spin-triplet pairing can become dominant at a certain region where the suppression of the antiferromagnetic fluctuation due to a geometric frustration becomes prominent.
AB - It is an important issue to clarify whether the odd-frequency superconducting state can be derived from microscopic Hamiltonian or not, where gap function has an odd-parity in frequency. We study the instability of following four superconducting states: (1) even-frequency spin-singlet, (2) even-frequency spin-triplet, (3) odd-frequency spin-singlet and (4) odd-frequency spin-triplet. By using the fluctuation exchange (FLEX) approximation on a triangular and square lattice, we find that the odd-frequency spin-triplet pairing can become dominant at a certain region where the suppression of the antiferromagnetic fluctuation due to a geometric frustration becomes prominent.
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U2 - 10.1016/j.jpcs.2008.06.067
DO - 10.1016/j.jpcs.2008.06.067
M3 - Article
AN - SCOPUS:57049086857
SN - 0022-3697
VL - 69
SP - 3280
EP - 3282
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
IS - 12
ER -