2005/02/04 by M. Iskin, Iskin, M., C. A. R. Sá de Melo +2
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.cond-mat/0502148
openalex publication_date 2005/02/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
We consider p-wave (triplet) pairing of single hyperfine state ultracold\natomic gases trapped in quasi-two-dimensional optical lattices. We find that\nthe critical temperatures in the lattice model is considerably higher and\nexperimentally attainable around half-filling in contrast to the predictions of\ncontinuum model for p-wave superfluids. In tetragonal lattices, we show that\nthe atomic compressibility and spin susceptibility have a peak at low\ntemperatures exactly at the half-filling, but this peak splits into two in the\northorhombic lattices. These peaks reflect the p-wave structure of the order\nparameter for superfluidity and they disappear as the critical temperature is\napproached from below. We also calculate the superfluid density tensor, and\nshow that for the orthorhombic case there is no off-diagonal component, however\nin the tetragonal case an off-diagonal component develops, and becomes a key\nsignature of the exotic p-wave state.\n