Magnetic chains on a triplet superconductor

Abstract

The topological state of a two-dimensional triplet superconductor may be changed by an appropriate addition of magnetic impurities. A ferromagnetic magnetic chain at the surface of a superconductor with spin-orbit coupling may eliminate the edge states of a finite system giving rise to localized zero modes at the edges of the chain. The coexistence/competition between the two types of zero modes is considered. The reduction of the system to an effective $1d$ system gives partial information on the topological properties but the study of the two sets of zero modes requires a two-dimensional treatment. Increasing the impurity density from a magnetic chain to magnetic islands leads to a finite Chern number. At half-filling small concentrations are enough to induce chiral modes.

25 pages, 11 figures

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Cited by in corpus (7)

• Edge and bulk localization of Floquet topological superconductors
• Majorana bound state localization and energy oscillations for magnetic impurity chains on conventional superconductors
• Quasidisorder Induced Topology
• Zero energy modes in a superconductor with ferromagnetic adatom chains and quantum phase transitions
• Spin-polarized currents and noise in NS junctions with Yu-Shiba-Rusinov impurities
• Effect of hybridization symmetry on topological phases of odd-parity multiband superconductors
• Spectral properties of superconductors with ferromagnetically ordered magnetic impurities