Tunable hybridization of Majorana bound states at the quantum spin Hall edge

Felix Keidel, Pablo Burset, Björn Trauzettel

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

36 Sitaatiot (Scopus)
296 Lataukset (Pure)

Abstrakti

Confinement at the helical edge of a topological insulator is possible in the presence of proximity-induced magnetic (F) or superconducting (S) order. The interplay of both phenomena leads to the formation of localized Majorana bound states (MBS) or likewise (under certain resonance conditions) the formation of ordinary Andreev bound states (ABS). We investigate the properties of bound states in junctions composed of alternating regions of F or S barriers. Interestingly, the direction of magnetization in F regions and the relative superconducting phase between S regions can be exploited to hybridize MBS or ABS at will. We show that the local properties of MBS translate into a particular nonlocal superconducting pairing amplitude. Remarkably, the symmetry of the pairing amplitude contains information about the nature of the bound state that it stems from. Hence this symmetry can in principle be used to distinguish MBS from ABS, owing to the strong connection between local density of states and nonlocal pairing in our setup.

AlkuperäiskieliEnglanti
Artikkeli075408
Sivut1-10
JulkaisuPhysical Review B
Vuosikerta97
Numero7
DOI - pysyväislinkit
TilaJulkaistu - 7 helmik. 2018
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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