Pair density wave and reentrant superconducting tendencies originating from valley polarization

Abstract

We investigate superconducting pairing tendencies of a two-dimensional electron fluid with both valley and spin degrees of freedom, both without and in the presence of an in-plane magnetic field. We present suggestive theoretical arguments that spontaneous valley polarization can lead to exotic singlet superconducting tendencies, including pair-density-wave order at zero field and re-entrant superconductivity at high field. We also find a reduced magnetic response in the polarized valley, which allows a finite violation of the Pauli limit. These results are obtained by a mean-field approach to a generalized $t$-$J$ model on a triangular lattice and in the dilute limit. Phenomenological similarities to results of recent magic-angle twisted trilayer graphene experiments are noted.

arXiv comment7 pages, 2 figures

References in corpus (21)

• Magic-angle graphene superlattices: a new platform for unconventional superconductivity
• Tunable Phase Boundaries and Ultra-Strong Coupling Superconductivity in Mirror Symmetric Magic-Angle Trilayer Graphene
• Roton pair density wave and unconventional strong-coupling superconductivity in a topological kagome metal
• Origin of Mott insulating behavior and superconductivity in twisted bilayer graphene
• Electric field tunable unconventional superconductivity in alternating twist magic-angle trilayer graphene
• Cascade of Phase Transitions and Dirac Revivals in Magic Angle Graphene
• The Physics of Pair Density Waves
• Giant and tunable valley degeneracy splitting in MoTe2
• Phases of a phenomenological model of twisted bilayer graphene
• Designing Flat Band by Strain
• Quantum valley Hall effect, orbital magnetism, and anomalous Hall effect in twisted multilayer graphene systems
• Twisted Bilayer Graphene IV. Exact Insulator Ground States and Phase Diagram
• Strain-induced quantum phase transitions in magic angle graphene
• Cascades between light and heavy fermions in the normal state of magic angle twisted bilayer graphene
• Moiré-pattern fluctuations and electron-phason coupling in twisted bilayer graphene
• In-plane critical magnetic fields in magic-angle twisted trilayer graphene
• Strong Coupling Limit of the Holstein-Hubbard Model
• Pair-Density-Wave in the Strong Coupling Limit of the Holstein-Hubbard model
• Topological superconductivity, ferromagnetism, and valley-polarized phases in moire systems: Renormalization group analysis for twisted double bilayer graphene
• A DMRG study: Pair-density wave in spin-valley locked systems
• Strain-induced excitonic instability in twisted bilayer graphene

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