Journal article

Atomic-scale interface engineering of Majorana edge modes in a 2D magnet-superconductor hybrid system

Alexandra Palacio-Morales, Eric Mascot, Sagen Cocklin, Howon Kim, Stephan Rachel, Dirk K Morr, Roland Wiesendanger

Science Advances | AMER ASSOC ADVANCEMENT SCIENCE | Published : 2019

Abstract

Topological superconductors are predicted to harbor exotic boundary states-Majorana zero-energy modes-whose non-Abelian braiding statistics present a new paradigm for the realization of topological quantum computing. Using low-temperature scanning tunneling spectroscopy, here, we report on the direct real-space visualization of chiral Majorana edge states in a monolayer topological superconductor, a prototypical magnet-superconductor hybrid system composed of nanoscale Fe islands of monoatomic height on a Re(0001)-O(2 × 1) surface. In particular, we demonstrate that interface engineering by an atomically thin oxide layer is crucial for driving the hybrid system into a topologically nontrivia..

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University of Melbourne Researchers

Grants

Awarded by European Research Council Advanced Grant ASTONISH


Awarded by U.S. Department of Energy, Office of Science, Basic Energy Sciences


Awarded by Australian Research Council


Awarded by National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science


Awarded by European Research Council Advanced Grant ADMIRE


Funding Acknowledgements

This work was supported by the European Research Council Advanced Grant ASTONISH (project no. 338802) and ADMIRE (project no. 786020); the Alexander von Humboldt foundation; the U.S. Department of Energy, Office of Science, Basic Energy Sciences, under award no. DE-FG02-05ER46225; and the Australian Research Council (FT180100211). This research used resources of the National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility operated under contract no. DE-AC02-05CH11231 (to E. M., S. C., and D. K. M.).