Fermi arcs and pseudogap phase in a minimal microscopic model of $d$-wave superconductivity

Abstract

We show conclusively that a pseudogap state can arise at $T>T_c$, for reasonable pairing interaction strength, from order parameter fluctuations in a two dimensional minimal model of $d$-wave superconductivity. The occurrence of the pseudogap requires neither strong correlation nor the presence of competing order. We study a model with attractive nearest neighbor interaction and establish our result using a combination of cluster based Monte Carlo for the order parameter field and a twisted-boundary scheme to compute the momentum-resolved spectral function. Apart from a dip in the density of states that characterizes the pseudogap, the momentum and frequency resolution on our effective lattice size $\sim 160\times 160$ allows two major conclusions: (i)~at $T<T_c$, despite the presence of thermal phase fluctuations the superconductor has only nodal Fermi points while all non nodal points on the normal state Fermi surface show a two peak spectral function with a dip at $\omega =0$, and (ii)~for $T>T_c$ the Fermi points develops into arcs, characterized by a single quasiparticle peak, and the arcs connect up to recover the normal state Fermi surface at a temperature $T^{\ast }>T_c$. We show the variation of $T_c$ and $T^{\ast }$ with coupling strength and provide detailed spectral results at a coupling where $T^{\ast }\sim 1.5T_c$.

7 pages, 6 figures

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• Fermi Arcs From Dynamical Variational Monte Carlo
• Phase fluctuations in two-dimensional superconductors and pseudogap phenomenon
• Superconducting fluctuations and charge-4$e$ plaquette state at strong coupling
• Stable pair liquid phase in fermionic systems
• Fractionalized Fermi liquids and the cuprate phase diagram
• Weyl semimetallic state with antiferromagnetic order in Rashba-Hubbard model
• Interplay between the charge density wave phase and a pseudogap under antiferromagnetic correlations
• Layered Topological Antiferromagnetic Metal at Room Temperature -- YbMn${}_2$Ge${}_2$
• Yamaji effect in models of underdoped cuprates
• Real-space d-wave superconductivity from weak attraction
• The interplay of phase fluctuations and nodal quasiparticles: ubiquitous Fermi arcs in two-dimensional d-wave superconductors