2017 Annual Report

Science News | AUGUST 19, 2017 IN MOTION

New evidence for a particle that is its own antiparticle, called a Majorana fermion, turned up in a quantum layer cake this year. To observe the signa- ture of the particle, proposed in 1937, researchers coupled a topological insulator (gray bar in this illustration), which conducts electricity only on its edges, with a superconductor layer. Blue, orange and purple lines show the paths of Majorana fermions; green lines are traveling electrons.

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10 | 2017 ANNUAL REPORT | SOCIETY COMPETITIONS