Chern mosaic

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2016-03-24
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Mcode
Degree programme
Language
en
Pages
1-8
Series
PHYSICAL REVIEW B, Volume 93, issue 9
Abstract
In this work, we will explore the properties of superconducting surfaces decorated by two-dimensional ferromagnetic adatom lattices. As discovered recently [Röntynen and Ojanen, Phys. Rev. Lett. 114, 236803 (2015)PRLTAO0031-900710.1103/PhysRevLett.114.236803], in the presence of a Rashba spin-orbit coupling these systems may support topological superconductivity with complex phase diagrams and high Chern numbers. We show how the long-range hopping nature of the effective low-energy theory generically gives rise to a phase diagram covered by a Chern mosaic, a rich pattern of topological phases with large Chern numbers. We study different lattice geometries and the dependence of energy gaps and abundance of different phases as a function of system parameters. Our findings establish the studied system as one of the richest platforms for topological matter known to date.
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Citation
Röntynen , J & Ojanen , T 2016 , ' Chern mosaic : Topology of chiral superconductivity on ferromagnetic adatom lattices ' , Physical Review B , vol. 93 , no. 9 , 094521 , pp. 1-8 . https://doi.org/10.1103/PhysRevB.93.094521