RT Journal Article
SR Electronic
T1 Atomic-scale interface engineering of Majorana edge modes in a 2D magnet-superconductor hybrid system
JF Science Advances
JO Sci Adv
FD American Association for the Advancement of Science
SP eaav6600
DO 10.1126/sciadv.aav6600
VO 5
IS 7
A1 Palacio-Morales, Alexandra
A1 Mascot, Eric
A1 Cocklin, Sagen
A1 Kim, Howon
A1 Rachel, Stephan
A1 Morr, Dirk K.
A1 Wiesendanger, Roland
YR 2019
UL http://advances.sciencemag.org/content/5/7/eaav6600.abstract
AB 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 nontrivial state as confirmed by theoretical calculations of the topological invariant, the Chern number.