Competition of density waves and superconductivity in twisted tungsten diselenide

Autor: Lennart Klebl, Ammon Fischer, Laura Classen, Michael M. Scherer, Dante M. Kennes
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Physical Review Research, Vol 5, Iss 1, p L012034 (2023)
Druh dokumentu: article
ISSN: 2643-1564
DOI: 10.1103/PhysRevResearch.5.L012034
Popis: Evidence for correlated insulating and superconducting phases around regions of high density of states was reported in the strongly spin-orbit coupled van der Waals material twisted tungsten diselenide (tWSe_{2}). We investigate their origin and interplay by using a functional renormalization group approach that allows one to describe superconducting and spin/charge instabilities in an unbiased way. We map out the phase diagram as a function of filling and perpendicular electric field, and find that the moiré Hubbard model for tWSe_{2} features mixed-parity superconducting order parameters with s/f-wave and topological d/p-wave symmetry next to (incommensurate) density-wave states. Our work systematically characterizes competing interaction-driven phases in tWSe_{2} beyond mean-field approximations and provides guidance for experimental measurements by outlining the fingerprint of correlated states in interacting susceptibilities.
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