Topological Superconductivity in Monolayer T${}_{\text{d}}$-MoTe${}_2$

Abstract

Topological superconductivity has attracted significant attention due to its potential applications in quantum computation, but its experimental realization remains challenging. Recently, monolayer T${}_{\text{d}}$-MoTe${}_2$ was observed to exhibit gate tunable superconductivity, and its in-plane upper critical field exceeds the Pauli limit. Here, we show that an in-plane magnetic field beyond the Pauli limit can drive the superconducting monolayer T${}_{\text{d}}$-MoTe${}_2$ into a topological superconductor. The topological superconductivity arises from the interplay between the in-plane Zeeman coupling and the unique \emph{Ising plus in-plane SOC} in the monolayer T${}_{\text{d}}$-MoTe${}_2$. The \emph{Ising plus in-plane SOC} plays the essential role to enable the effective $p_x+i{p}_y$ pairing. Importantly, as the essential \emph{Ising plus in-plane SOC} in the monolayer T${}_{\text{d}}$-MoTe${}_2$ is generated by an in-plane polar field, our proposal demonstrates that applying an in-plane magnetic field to a gate tunable 2D superconductor with an in-plane polar axis is a feasible way to realize topological superconductivity.

9 pages, 4 figures, plus Supplementary Material. Comments are welcome

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Cited by in corpus (4)

• Discovery of smectic charge and pair-density-wave orders in topological monolayer 1T${}^{\prime }$-MoTe${}_2$
• Systematic study of superconductivity in few-layer $T_d$-MoTe${}_2$
• Transverse superconducting diode without parity and time-reversal violation
• Specular-Andreev reflection and Andreev interference in an Ising superconductor junction