Coupled Ferroelectricity and Superconductivity in Bilayer $T_d$-MoTe${}_2$

Abstract

Achieving electrostatic control of quantum phases is at the frontier of condensed matter research. Recent investigations have revealed superconductivity tunable by electrostatic doping in twisted graphene heterostructures and in two-dimensional (2D) semimetals such as WTe${}_2$. Some of these systems have a polar crystal structure that gives rise to ferroelectricity, in which the interlayer polarization exhibits bistability driven by external electric fields. Here we show that bilayer $T_d$-MoTe${}_2$ simultaneously exhibits ferroelectric switching and superconductivity. Remarkably, a field-driven, first-order superconductor-to-normal transition is observed at its ferroelectric transition. Bilayer $T_d$-MoTe${}_2$ also has a maximum in its superconducting transition temperature ($T_{\text{c}}$) as a function of carrier density and temperature, allowing independent control of the superconducting state as a function of both doping and polarization. We find that the maximum $T_{\text{c}}$ is concomitant with compensated electron and hole carrier densities and vanishes when one of the Fermi pockets disappears with doping. We argue that this unusual polarization-sensitive 2D superconductor is driven by an interband pairing interaction associated with nearly nested electron and hole Fermi pockets.

References in corpus (13)

• Restoring the density-gradient expansion for exchange in solids and surfaces
• Generalized gradient approximation for solids and their surfaces
• Titanic Magnetoresistance in WTe2
• Stacking-engineered ferroelectricity in bilayer boron nitride
• Tunable Phase Boundaries and Ultra-Strong Coupling Superconductivity in Mirror Symmetric Magic-Angle Trilayer Graphene
• Near-degeneracy of several pairing channels in multiorbital models for the Fe-pnictides
• Interfacial ferroelectricity in rhombohedral-stacked bilayer transition metal dichalcogenides
• Terahertz-Field-Induced Ferroelectricity in Quantum Paraelectric SrTiO${}_3$
• Quantum Criticality in Twisted Transition Metal Dichalcogenides
• Ironing out the details of unconventional superconductivity
• The extremely large magnetoresistance in the Candidate Type-II Weyl semimetal MoTe2
• Direct measurement of ferroelectric polarization in a tunable semimetal
• Prediction of ferroelectric superconductors with reversible superconducting diode effect

Cited by in corpus (39)

• Atypical sliding and Moire ferroelectricity in pure multilayer graphene
• Across-Layer Sliding Ferroelectricity in Graphene-Based Heterolayers: Asymmetry of Next Neighbor Interlayer Couplings
• Tunable moiré materials for probing Berry physics and topology
• Emergent properties of van der Waals bilayers revealed by computational stacking
• Control of proton transport and hydrogenation in double-gated graphene
• Ferroelectric metals in 1T/1T'-phase transition metal dichalcogenide MTe2 bilayers (M = Pt, Pd, and Ni)
• Strong Coupling of Coherent Phonons to Excitons in Semiconducting Monolayer MoTe${}_2$
• Superconducting Diode Effects: Mechanisms, Materials and Applications
• Ferroelectricity-tuned band topology and superconductivity in two-dimensional materials and related heterostructures
• Unveiling the origin of unconventional moire ferroelectricity
• Polarization Saturation in Multi-layered Interfacial Ferroelectrics
• Ferroelectric tuning of superconductivity and band topology in a two-dimensional heterobilayer
• Topological Valley Transport in Bilayer Graphene Induced by Interlayer Sliding
• Ferroelectric topological superconductor
• Quantum-Geometric Origin of Out-of-plane Stacking Ferroelectricity
• Robust magnetic proximity induced anomalous Hall effect in a room temperature van der Waals ferromagnetic semiconductor based 2D heterostructure
• Disorder-broadened phase boundary with enhanced amorphous superconductivity in pressurized In2Te5
• Topological Superconductivity in Monolayer T${}_{\text{d}}$-MoTe${}_2$
• Superlubric sliding ferroelectricity
• Emergent superconductivity in doped ferroelectric hafnia
• Two-Fold Anisotropic Superconductivity in Bilayer T${}_d$-MoTe${}_2$
• Controllable spin splitting in 2D Ferroelectric few-layer ${$γ}$-GeSe
• Cluster Sliding Ferroelectricity in Trilayer Quasi-Hexagonal C${}_{60}$
• Polar charge density wave in a superconductor with crystallographic chirality
• Dual-Switch Control of a Layer-Locked Anomalous Valley Hall Effect in a Sliding Ferroelectric Antiferromagnet
• Superconducting pairing symmetry in MoTe${}_2$
• Quasiparticle and superfluid dynamics in Magic-Angle Graphene
• Discovery of smectic charge and pair-density-wave orders in topological monolayer 1T${}^{\prime }$-MoTe${}_2$
• Phonon anomalies within the polar charge density wave phase of the structurally chiral superconductor Mo${}_3$Al${}_2$C
• Universally enhanced superconductivity and coexisting ferroelectricity at oxide interfaces
• Nanorobotic actuator based on interlayer sliding ferroelectricity and field-tunable friction
• Clues to potential dipolar-Kondo and RKKY interactions in a polar metal
• Alex Müller, the High-Tc Field-Effect Transistor and Electric-Field Gated Quantum Materials
• Kekulé order from diffuse nesting near higher-order Van Hove points
• Systematic study of superconductivity in few-layer $T_d$-MoTe${}_2$
• Ultrafast non-thermal suppression of ferroelectricity by carrier screening in LiNbO3
• Stabilization of sliding ferroelectricity through exciton condensation
• Third-order nonlinear transport in a percolative two-dimensional superconductor
• Shear-Mode Raman Imaging of Ferroelectric Switching in Multilayer 3$R$-MoS${}_2$