Odd-parity triplet pair induced by Hund's rule coupling

Hotta, Takashi; Ueda, Kazuo*

Physical Review Letters, 92(10), p.107007_1 - 107007_4, 2004/03

https://doi.org/10.1103/PhysRevLett.92.107007

We discuss microscopic aspects of odd-parity triplet pair in orbital degenerate systems. From the concept of off-diagonal long-range order, a pair state is unambiguously defined as the eigenstate with the maximum eigenvalue of pair correlation function. Performing this scheme by a numerical technique, we clarify that the odd-parity triplet pair occurs as an out-of-phase combination of local triplets induced by Hund's rule coupling for the lattice including two sites in the unit cell.