also be chemical compounds, such as mercury telluride (HgTe), and tin, bismuth, and graphite are typically not considered metalloids. Transient semimetal states have been reported at extreme conditions. It has been recently shown that some conductive polymers can behave as semimetals. See also Charge-transfer insulators Half-metal Hubbard model Mott insulator Solid-state physics References Materials Condensed matter physics Metals