Bi2Se3 is part of the bismuth-chalcogenide family, the most widely studied type of topological insulators. They are regarded as model examples of 3D topological insulators, hosting a single spin-helical surface state, at least theoretically. In practice, exposure to residual gases in UHV radically alters its electronic structure. Structurally, Bi2Se3 is a quintuple layer topological insulator.
Our ingots, grown by the modified Bridgeman-Stockbarger method, are cut into pieces of different sizes. See our sample catalogue at the bottom of this page for photographs and characteristics of all the samples we offer.