Quantum criticality and superconductivity in twisted transition metal dichalcogenides
Andrey V. Chubukov, C. M. Varma
Abstract
The authors analyze here superconductivity in the twisted transition metal chalcogenide WSe${}_{2}$. In this material, spin-orbit scattering locks the $z$ components of spins of low-energy fermions. The authors show that the nominally repulsive 4-fermion interaction gives rise to an attraction in a hexagonal lattice version of $p$-wave channel. The gap function is inversion-odd and a linear combination of spin singlet and spin triplet. At weak coupling, superconductivity emerges via the Kohn-Luttinger mechanism. At strong coupling, the pairing is mediated by XY magnetic fluctuations.
Topics & Concepts
SuperconductivityCriticalityCondensed matter physicsQuantumTransition metalPhysicsMaterials scienceQuantum mechanicsChemistryNuclear physicsCatalysisBiochemistry2D Materials and ApplicationsOrganic and Molecular Conductors ResearchInorganic Chemistry and Materials