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Superconductor derived from a topological insulator heterostructure

Apr 7, 2014

5 pages

Published in:

Phys.Rev.B 90 (2014) 22, 220504

Published: Dec 1, 2014

e-Print:

1404.1707 [cond-mat.supr-con]

DOI:

10.1103/PhysRevB.90.220504

View in:

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Abstract: (APS)

Topological superconductors (TSCs) are of significant current interest because they offer promising platforms for finding Majorana fermions. Here we report on a superconductor synthesized by intercalating Cu into a naturally formed topological insulator (TI) heterostructure consisting of Bi2Se3 TI units separated by nontopological PbSe units. Interestingly, in this TI-based superconductor, the specific-heat behavior suggests the occurrence of unconventional superconductivity with gap nodes. The existence of gap nodes in a strongly spin-orbit coupled superconductor would give rise to spin-split Andreev bound states that are the hallmark of topological superconductivity. Hence, this superconductor emerges as an intriguing candidate TSC.

Note:

5 pages, 4 figures (paper proper) + 5 pages, 7 figures (supplemental material)

74.10.+v
74.25.Bt
74.70.Dd
74.78.Fk

References(33)

Figures(0)

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