Statistical theory of superfluidity with singlet pairing

Alexander I. Akhiezer, A. A. Isaev, S. V. Peletminsky +1 more

The possibility of a phase transition from the one-gap superfluid state with the singlet or triplet pairing of fermions to the two-gap superfluid state corresponding to the superposition of states with the singlet and triplet pairing in a Fermi liquid is considered. The thermodynamic stability of new two-gap solutions is analyzed.

Pierre M. V. Résibois, I. Prigogine

В. А. Головко

S. M. Girvin, Allan H. MacDonald, Matthew P. A. Fisher +2 more

Using notions of supersymmetry, we present an exactly soluble model of anyons with both statistical and scalar interactions in 2+1 dimensions. We demonstrate that half-statistics particles with two spin flavors condense into a local singlet state which is both a charge superfluid and a ``spin metal'' in the sense that there is charge-pairing off-diagonal long-range order with gapless charge excitations, but a gap in the collective spin-mode spectrum. The present results shed considerable light on the mean-field theory of fractional statistics.

Alexander V. Balatsky, Vadim Kalmeyer

We consider a gas of fractional-statistics particles constructed by binding flux \ifmmode\pm\else\textpm\fi{}\ensuremath{\pi} to fermions with charge \ifmmode\pm\else\textpm\fi{}1. In its ground state, the system is a superfluid condensate of s-wave pairs with no observable chirality.

W. A. B. EVANS, R. I. M. A. Rashid