Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2012-01-09
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 4 figures in main text and 4 pages, 7 figures in supplementary materials, references updated
Scientific paper
Different realizations of Majorana fermions in solid state materials have attracted a great deal of interests recently in connection to topological order and quantum information processing. We propose a novel way to create Majorana fermions in superconductors. We show that an incipient non-collinear magnetic order turns a spin-singlet superconductor with nodes into a topological superconductor with a stable Majorana bound state in the vortex core or on the edge. We argue that such an exotic non-Abelian phase can be realized in extended t-J models on different lattices with two explicit examples: one on the triangular lattice and the other on the square lattice. Our proposal provides a new avenue for the search of Majorana fermions in correlated electron materials where nodal superconductivity and magnetism are two common caricatures.
Lu Yuan-Ming
Wang Ziqiang
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