Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 117, Issue 16, Pages 8775-8782Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1919753117
Keywords
Majorana zero mode; topological superconductor; quantum computing; Majorana bound state
Categories
Funding
- John Templeton Foundation [39944, 60148]
- Office of Naval Research [N00014-13-1-0301, N00014-16-1-2657]
- National Science Foundation [DMR-1207469, DMR-1700137]
- National Science Foundation QLCI-CG grant [1937155]
- Department of Energy (DOE) [DE-FG02-03ER46076]
- Croucher Foundation
- Dr. Tai-chin Lo Foundation
- Hong Kong Research Grants Council [C6026-16W]
- Direct For Mathematical & Physical Scien
- MPS Multidisciplinary Activities [1937155] Funding Source: National Science Foundation
- U.S. Department of Energy (DOE) [DE-FG02-03ER46076] Funding Source: U.S. Department of Energy (DOE)
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Under certain conditions, a fermion in a superconductor can separate in space into two parts known as Majorana zero modes, which are immune to decoherence from local noise sources and are attractive building blocks for quantum computers. Promising experimental progress has been made to demonstrate Majorana zero modes in materials with strong spin-orbit coupling proximity coupled to superconductors. Here we report signatures of Majorana zero modes in a material platform utilizing the surface states of gold. Using scanning tunneling microscope to probe EuS islands grown on top of gold nanowires, we observe two well-separated zero-bias tunneling conductance peaks aligned along the direction of the applied magnetic field, as expected for a pair of Majorana zero modes. This platform has the advantage of having a robust energy scale and the possibility of realizing complex designs using lithographic methods.
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