Realizing Topological Superconductivity in Tunable Bose-Fermi Mixtures with Transition Metal Dichalcogenide Heterostructures

Abstract

Heterostructures of two-dimensional transition metal dichalcogenides (TMDs) are emerging as a promising platform for investigating exotic correlated states of matter. Here, we propose to engineer Bose-Fermi mixtures in these systems by coupling inter-layer excitons to doped charges in a trilayer structure. Their interactions are determined by the inter-layer trion, whose spin-selective nature allows excitons to mediate an attractive interaction between charge carriers of only one spin species. Remarkably, we find that this causes the system to become unstable to topological p+ip superconductivity at low temperatures. We then demonstrate a general mechanism to develop and control this unconventional state by tuning the trion binding energy using a solid-state Feshbach resonance.

11 pages, 5 figures. Final version

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Cited by in corpus (10)

• Interactions mediated by atoms, photons, electrons, and excitons
• Superconductivity induced by strong electron-exciton coupling in doped atomically thin semiconductor heterostructures
• Feshbach hypothesis of high-Tc superconductivity in cuprates
• Electrically tunable layer-hybridized trions in doped WSe${}_2$ bilayers
• Topological Interlayer Superconductivity in a van der Waals Heterostructure
• Boson-fermion pairing and condensation in two-dimensional Bose-Fermi mixtures
• Momentum-dependent quasiparticle properties of the Fermi polaron from the functional renormalization group
• Tuning transport in solid-state Bose-Fermi mixtures by Feshbach resonances
• Resonantly enhanced superconductivity mediated by spinor condensates
• Unconventional superconductivity mediated by exciton density wave fluctuations