Surface pair-density-wave superconducting and superfluid states

Abstract

Fulde, Ferrell, Larkin, and Ovchinnikov (FFLO) predicted inhomogeneous superconducting and superfluid ground states, spontaneously breaking translation symmetries. In this Letter, we demonstrate that the transition from the FFLO to the normal state as a function of temperature or increased Fermi surface splitting is not a direct one. Instead the system has an additional phase transition to a different state where pair-density-wave superconductivity (or superfluidity) exists only on the boundaries of the system, while the bulk of the system is normal. The surface pair-density-wave state is very robust and exists for much larger fields and temperatures than the FFLO state.

arXiv commentv3: Published version

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Cited by in corpus (14)

• Boundary states with elevated critical temperatures in Bardeen-Cooper-Schrieffer superconductors
• Ring solitons and soliton sacks in imbalanced fermionic systems
• Microscopic derivation of superconductor-insulator boundary conditions for Ginzburg-Landau theory revisited. Enhanced superconductivity at boundaries with and without magnetic field
• Pair-density-wave superconductivity of faces, edges and vertices in systems with imbalanced fermions
• Quasiclassical expressions for the free energy of superconducting systems
• Antichiral and nematicity-wave superconductivity
• Synthetic nuclear Skyrme matter in imbalanced Fermi superfluids with a multicomponent order parameter
• Non-gapless excitation and zero-bias fast oscillations in the LDOS of surface superconducting states
• Tailoring of the interference-induced surface superconductivity by an applied electric field
• Superconducting properties of Fibonacci chains with enhanced superconducting pairing at the boundaries
• Spontaneous edge corner currents in $s+is$ superconductors and time reversal symmetry breaking surface states
• Comment on "Surface Pair-Density-Wave Superconducting and Superfluid States"
• Reply to the Comment on "Surface Pair-Density-Wave Superconducting and Superfluid States"
• Universal crossover in surface superconductivity: Impact of varying Debye energy