Pairing instabilities in topological insulator quantum wells

Abstract

Topological insulator quantum wells with induced attractive interactions between electrons are candidate systems for the realization of novel vortex lattice states with time-reversal symmetry, and incompressible quantum vortex liquids with fractional excitations. We analyze the competition between different pairing channels stimulated by the superconducting proximity effect in these quantum wells, and calculate the helical triplet pairing instability that can produce the mentioned phases using perturbation theory. We discuss the phase diagram tunable by gate voltage.

13 pages, 6 figures; typos corrected, published version

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Cited by in corpus (4)

• Two-dimensional heavy fermions on the strongly correlated boundaries of Kondo topological insulators
• Interaction proximity effect at the interface between a superconductor and a topological insulator quantum well
• Vortex states in a non-Abelian magnetic field
• Tunable zero-energy Dirac and Luttinger nodes in a two-dimensional topological superconductor