Quantum mechanics

Engineering

Antiferromagnetism

Materials science

Business

Physics

Mathematics

Topological insulator

Condensed matter physics

Combinatorics

Finance

Topology (electrical circuits)

Thermal conduction

Optoelectronics

Order (exchange)

Insulator (electricity)

Electrical engineering

Nature

A material that has electrically conducting surfaces has been found to show, when cooled, a type of magnetic ordering that reduces conduction at the surfaces. Such remarkable behaviour could have practical applications. Evidence for an antiferromagnetic topological insulator.

Magnetic and topological order united in a crystal