Quantized charge transport in chiral Majorana edge modes

Rachel, Stephan; Mascot, Eric; Cocklin, Sagen; Vojta, Matthias; Morr, Dirk K.

doi:10.1103/PhysRevB.96.205131

Quantized charge transport in chiral Majorana edge modes

Journal Article · Thu Nov 16 00:00:00 EST 2017 · Physical Review. B

DOI:https://doi.org/10.1103/PhysRevB.96.205131· OSTI ID:2930407

Rachel, Stephan ^[1]; Mascot, Eric ^[2]; Cocklin, Sagen ^[2]; Vojta, Matthias ^[3]; Morr, Dirk K. ^[2]

Technische Universität Dresden (Germany); University of Melbourne, Parkville, VIC (Australia)
University of Illinois at Chicago, IL (United States)
Technische Universität Dresden (Germany)

Majorana fermions can be realized as quasiparticles in topological superconductors, with potential applications in topological quantum computing. Recently, lattices of magnetic adatoms deposited on the surface of 𝑠-wave superconductors—Shiba lattices—have been proposed as a new platform for topological superconductivity. Furthermore, these systems possess the great advantage that they are accessible via scanning-probe techniques and thus enable the local manipulation and detection of Majorana modes. Using a nonequilibrium Green's function technique we demonstrate that the topological Majorana edge modes of nanoscopic Shiba islands display universal electronic and transport properties. Most remarkably, these Majorana modes possess a quantized charge conductance that is proportional to the topological Chern number, 𝒞, and carry a supercurrent whose chirality reflects the sign of 𝒞. These results establish nanoscopic Shiba islands as promising components in future topology-based devices.

View Accepted Manuscript (DOE)

Research Organization:: University of Illinois at Chicago, IL (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-05ER46225

OSTI ID:: 2930407

Alternate ID(s):: OSTI ID: 1409134
OSTI ID: 1540735

Journal Information:: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 20 Vol. 96; ISSN 2469-9969; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Edge states
Majorana fermions
Nonequilibrium Green's function
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p-wave

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