Topological effects on transition temperatures and response functions in three-dimensional Fermi superfluids

Abstract

We investigate the effects of topological order on the transition temperature, $T_c$, and response functions in fermionic superfluids with Rashba spin-orbit coupling and a transverse Zeeman field in three dimensions. Our calculations, relevant to the ultracold atomic Fermi gases, include fluctuations beyond mean-field theory and are compatible with $f$-sum rules. Reminiscent of the $p_x+i{p}_y$ superfluid, the topological phase is stabilized when driven away from the Bose-Einstein condensation and towards the BCS limit. Accordingly, while experimentally accessible, $T_c$ is significantly suppressed in a topological superfluid. Above $T_c$, the spin and density response functions provide signatures of topological phases via the recombination or amplification of frequency dependent peaks.

References in corpus (13)

• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
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• Using photoemission spectroscopy to probe a strongly interacting Fermi gas
• $p_x+i{p}_y$ superfluid from s-wave interactions of fermionic cold atoms
• Thermodynamics of the BCS-BEC crossover
• Bragg spectroscopy of a strongly interacting Fermi gas
• BCS-BEC crossover induced by a synthetic non-Abelian gauge field
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• Thermodynamic Properties of Rashba Spin-Orbit-Coupled Fermi Gas
• Signatures of pairing and spin-orbit coupling in correlation functions of Fermi gases
• Fluctuation Theory of Rashba Fermi Gases

Cited by in corpus (4)

• When Superconductivity Crosses Over: From BCS to BEC
• Majorana zero modes in spintronics devices
• Induced interactions in the BCS-BEC crossover of two-dimensional Fermi gases with Rashba spin-orbit coupling
• Superfluid transition temperature and fluctuation theory of spin-orbit and Rabi-coupled fermions with tunable interactions