Superconductivity from Domain Wall Fluctuations in Sliding Ferroelectrics

Chaudhary, Gaurav; Martin, Ivar

doi:10.1103/PhysRevLett.133.246001

Superconductivity from Domain Wall Fluctuations in Sliding Ferroelectrics

Journal Article · Tue Dec 10 04:00:00 EST 2024 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.133.246001· OSTI ID:2480735

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Bilayers of two-dimensional van der Waals materials that lack an inversion center can show a novel form of ferroelectricity, where certain stacking arrangements of the two layers lead to an interlayer polarization. Under an external out-of-plane electric field, a relative sliding between the two layers can occur, accompanied by an interlayer charge transfer and a ferroelectric switching. We show that the domain walls that mediate ferroelectric switching are a locus of strong attractive interactions between electrons. The attraction is mediated by the ferroelectric domain wall fluctuations, effectively driven by the soft interlayer shear phonon. We comment on the possible relevance of this attraction mechanism to the recent observation of an interplay between sliding ferroelectricity and superconductivity in bilayer $T_{d} − {MoTe}_{2}$ . We also discuss the possible role of this mechanism in the superconductivity of moiré bilayers.

Published by the American Physical Society 2024

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Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI ID:: 2480735

Alternate ID(s):: OSTI ID: 2997242

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 133; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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