Interaction-induced topological phase transition and Majorana edge states in low-dimensional orbital-selective Mott insulators

Abstract

Topological phases of matter are among the most intriguing research directions in Condensed Matter Physics. It is known that superconductivity induced on a topological insulator's surface can lead to exotic Majorana modes, the main ingredient of many proposed quantum computation schemes. In this context, the iron-based high critical temperature superconductors are a promising platform to host such an exotic phenomenon in real condensed-matter compounds. The Coulomb interaction is commonly believed to be vital for the magnetic and superconducting properties of these systems. This work bridges these two perspectives and shows that the Coulomb interaction can also drive a canonical superconductor with orbital degrees of freedom into the topological state. Namely, we show that above a critical value of the Hubbard interaction the system simultaneously develops spiral spin order, a highly unusual triplet amplitude in superconductivity, and, remarkably, Majorana fermions at the edges of the system.

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Cited by in corpus (17)

• Skyrmion Control of Majorana States in Planar Josephson Junctions
• Interactions enable Thouless pumping in a nonsliding lattice
• Pair-density-wave superconductor from doping Haldane chain and rung-singlet ladder
• Majorana zero modes in Y-shape interacting Kitaev wires
• Prediction of orbital selective Mott phases and block magnetic states in the quasi-one-dimensional iron chain Ce${}_2$O${}_2$FeSe${}_2$ under hole and electron doping
• Majorana corner states on the dice lattice
• Out of Equilibrium Majoranas in Interacting Kitaev Chains
• Strongly anisotropic electronic and magnetic structures in oxide dichlorides RuOCl${}_2$ and OsOCl${}_2$
• Multitude of Topological Phase Transitions in Bipartite Dice and Lieb Lattices with Interacting Electrons and Rashba Coupling
• Quantum magnetism of iron-based ladders: Blocks, spirals, and spin flux
• Magnetization dynamics fingerprints of an excitonic condensate $t_{2g}^4$ magnet
• Electronic structure, magnetic properties and pairing tendencies of the copper-based honeycomb lattice Na${}_2$Cu${}_2$TeO${}_6$
• Topological superconductivity driven by correlations and linear defects in multiband superconductors
• A proposal for realizing Majorana fermions without external magnetic field in strongly correlated nanowires
• The orbital-driven topological phase transition and planar Hall responses in ternary tellurides Weyl semi-metals
• Quantum anomalous Hall domains in a Quenched Topological Mott Insulator
• Quasi-one-dimensional spin excitations in the iron pnictide NaFe${}_{0.53}$Cu${}_{0.47}$As