TY - JOUR
T1 - Majorana bound state localization and energy oscillations for magnetic impurity chains on conventional superconductors
AU - Theiler, Andreas
AU - Bjoernson, Kristofer
AU - Black-Schaffer, Annica M.
PY - 2019/12/6
Y1 - 2019/12/6
N2 - We study a chain of magnetic impurities on a conventional superconductor with spin-orbit coupling, treating the superconducting order fully self-consistently. We find and quantify strong hybridization between the topological edge Majorana bound states (MBSs) and in-gap Yu-Shiba-Rusinov (YSR) states, which causes increasing energy oscillations as a function of magnetic impurity strength, even when the direct MBS overlap is negligible. By treating the MBS as a topological boundary state, dependent only on the effective mass gap, we arrive at a fully parameter-free functional form of its localization that decreases with magnetic impurity strength, opposite to the behavior of the superconducting coherence length.
AB - We study a chain of magnetic impurities on a conventional superconductor with spin-orbit coupling, treating the superconducting order fully self-consistently. We find and quantify strong hybridization between the topological edge Majorana bound states (MBSs) and in-gap Yu-Shiba-Rusinov (YSR) states, which causes increasing energy oscillations as a function of magnetic impurity strength, even when the direct MBS overlap is negligible. By treating the MBS as a topological boundary state, dependent only on the effective mass gap, we arrive at a fully parameter-free functional form of its localization that decreases with magnetic impurity strength, opposite to the behavior of the superconducting coherence length.
U2 - 10.1103/PhysRevB.100.214504
DO - 10.1103/PhysRevB.100.214504
M3 - Journal article
SN - 2469-9950
VL - 100
JO - Physical Review B
JF - Physical Review B
IS - 21
M1 - 214504
ER -