Unconventional superfluids of fermionic polar molecules in a bilayer system

TL;DR

This paper investigates unconventional superfluid phases in a bilayer system of fermionic polar molecules, focusing on their critical temperatures, pairing symmetries, and potential for realizing topological phases at ultralow temperatures.

Contribution

It provides a detailed analysis of the critical temperatures and pairing competitions in fermionic polar molecule bilayers, highlighting conditions for observing topological superfluids.

Findings

Unconventional pairings depend on system parameters.

Competition between s-wave and d-wave pairings is significant.

Ultralow temperatures are necessary for experimental realization.

Abstract

We study unconventional superfluids of fermionic polar molecules in a two-dimensional bilayer system with dipoles are head-to-tail across the layers. We analyze the critical temperature of several unconventional pairings as a function of different system parameters. The peculiar competition between the $d$- and the $s$- wave pairings is discussed. We show that the experimental observation of such unconventional superfluids requires ulralow temperatures, which opens up new possibilities to realize several topological phases.