Possible experimental realization of a basic <i>Z</i>2 topological semimetal in GaGeTe
Possible experimental realization of a basic <i>Z</i>2 topological semimetal in GaGeTe
We report experimental and theoretical evidence that GaGeTe is a basic $Z_2$ topological semimetal with three types of charge carriers: bulk-originated electrons and holes as well as surface state electrons. This electronic situation is qualitatively similar to the primer 3D topological insulator Bi2Se3, but important differences account for an unprecedented …