Prediction of ferroelectric superconductors with reversible superconducting diode effect

Abstract

A noncentrosymmetric superconductor can have a superconducting diode effect, where the critical current in opposite directions is different when time-reversal symmetry is also broken. We theoretically propose that a ferroelectric superconductor with coexisting ferroelectricity and superconductivity can support a ferroelectric reversible superconducting diode effect. Through first-principles calculation, we predict that monolayer CuNb${}_2$Se${}_4$ (i.e., bilayer NbSe${}_2$ intercalated with Cu) is such a ferroelectric superconductor, where ferroelectricity controls the layer polarization as well as the sign of spin-orbit coupling induced spin splittings. Because the nonreciprocal effect of the critical current is proportional to the spin splittings, the superconducting diode effect is reversible upon electric switch of ferroelectricity. While we use CuNb${}_2$Se${}_4$ as a model system, the predicted effect can appear in a class of two-dimensional superconducting bilayers with ferroelectricity induced by interlayer sliding. Our work opens the door to studying the interplay between superconductivity and ferroelectricity in two-dimensional materials.

7+6 pages, 4+4 figures

References in corpus (15)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Interfacial Ferroelectricity by van-der-Waals Sliding
• Interfacial ferroelectricity in rhombohedral-stacked bilayer transition metal dichalcogenides
• Realization of the field-free Josephson Diode
• A Josephson junction supercurrent diode
• Intrinsic Superconducting Diode Effect
• Supercurrent diode effect and finite momentum superconductivity
• Zero-field superconducting diode effect in small-twist-angle trilayer graphene
• A phenomenological theory of superconductor diodes
• Supercurrent diode effect and magnetochiral anisotropy in few-layer NbSe${}_2$
• Field-free superconducting diode effect in noncentrosymmetric superconductor/ferromagnet multilayers
• Superconducting diode effect via conformal-mapped nanoholes
• Theory of zero-field superconducting diode effect in twisted trilayer graphene
• Giant anomalous Hall effect in quasi-two-dimensional layered antiferromagnet Co${}_{1/3}$NbS${}_2$
• Supercurrent Diode Effect, Spin Torques, and Robust Zero-Energy Peak in Planar Half-Metallic Trilayers

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