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|Abstract:||We show that a chain of nonmagnetic impurities deposited on a fully gapped two- or three-dimensional superconductor can become a topological one-dimensional superconductor with protected Majorana bound states at its end. A prerequisite is that the pairing potential of the underlying superconductor breaks the spin-rotation symmetry, as it is generically the case in systems with strong spin-orbit coupling. We illustrate this mechanism for a spinless triplet-superconductor (p(x) + ip(y)) and a time-reversal symmetric Rashba superconductor with a mixture of singlet and triplet pairing. For the latter, we showthat the impurity chain can be topologically nontrivial even if the underlying superconductor is topologically trivial.|
|Electronic Publication Date:||7-Mar-2016|
|Citation:||Neupert, Titus, Yazdani, A, Bernevig, B Andrei. (2016). Shiba chains of scalar impurities on unconventional superconductors. PHYSICAL REVIEW B, 93 (10.1103/PhysRevB.93.094508|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||PHYSICAL REVIEW B|
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