Topological superconductivity in a multichannel Yu-Shiba-Rusinov chain

Junhua Zhang; Younghyun Kim; E. Rossi; Roman M. Lutchyn

doi:10.1103/PhysRevB.93.024507

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Topological superconductivity in a multichannel Yu-Shiba-Rusinov chain

Junhua Zhang, Younghyun Kim, E. Rossi, Roman M. Lutchyn

DOI 10.1103/PhysRevB.93.024507 · Physical Review B

T1

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Abstract

Chains of magnetic atoms placed on the surface of an s-wave superconductor with large spin-orbit coupling provide a promising platform for the realization of topological superconducting states characterized by the presence of Majorana zero-energy modes. In this work, we study the properties of one-dimensional chains of Yu-Shiba-Rusinov states induced by magnetic impurities using a realistic model for the magnetic atoms that includes the presence of multiple scattering channels. These channels are mixed by spin-orbit coupling and, via the hybridization of the Yu-Shiba-Rusinov states at different sites of the chain, result in a multiband structure for the chain. We obtain the topological phase diagram for such a band structure and show that the inclusion of higher bands can greatly enlarge the phase space for the realization of topological states.

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Formula	Reported Tc (K)	Pressure (GPa)	Type
Fe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown