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a substance occupying an intermediate position between metals and semiconductors with regard to electrical properties. A characteristic feature of semimetals is a weak overlapping of the valence band and conduction band. This indicates that semimetals remain conductors of electric current down to a temperature of absolute zero and yet have a low (compared to metals) concentration of current carriers—approximately 1018-1020 cm-3. Semimetals include Bi, Sb, As, and graphite.

Current carriers in semimetals exhibit high mobility and low effective mass. These properties make semimetals the most suitable substances for use in observing size effects, semimetal-dielec-tric phase transitions in strong magnetic fields, and many other phenomena.


Fizika metallov. Vol. 1: Elektrony. Edited by J. Ziman. Moscow, 1972. (Translated from English.)
Lifshits, I. M., M. Ia. Azbel’, and M. I. Kaganov. Elektronnaia teoriia metallov. Moscow, 1971.
Fal’kovskii, L. A. “Fizicheskie svoistva vismuta.” Uspekhi fizicheskikh nauk, 1968, vol. 94, issue 1, p. 3.
Larson, D. C. “Razmernye effekty v elektroprovodnosti tonkikh metal-licheskikh plenok i provolok”. In Fizika tonkikh plenok, vol. 6. Moscow, 1973. (Translated from English.)


References in periodicals archive ?
Weyl semimetals also resemble atom-thick sheets of carbon called graphene, Balents says.
The paper is titled "Discovery of a Three-dimensional Topological Dirac Semimetal, Na3Bi".
Now however, a new type of materials, the so-called Weyl semimetals, similar to 3-D graphene, allow us to put the symmetry destructing quantum anomaly to work in everyday phenomena, such as the creation of electric current.
New classes of quantum materials are found in insulators and semimetals that exhibit non-trivial topologies: they display a plethora of novel phenomena including: topological surface states; new Fermions such as Weyl, Dirac or Majorana; and non-collinear spin textures such as Skyrmions.
It is frequently considered as an assemblage name for metals and semimetals (metalloids) that have been linked with contamination and potential toxicity or ecotoxicity [1].
Delta-doping of semiconductors: Electronic, optical, and structural properties of materials and devices," Semiconductors and Semimetals, Vol.
Browning, Overview of measurement and characterization techniques for TE materials, in Recent Trends in TE Materials Research I, Semiconductors and Semimetals, Vol.
Metals, unlike semimetals or nonmetals, are conductors of electricity and heat.
The editor has composed five separate, thematic volumes on thin films of metals, semimetals, glasses, ceramics, alloys, organics, diamonds, graphites, porous materials, noncrystalline solids, supramolecules, polymers, copolymers, biopolymers, composites, blends, activated carbons, intermetallics, chalcogenides, dyes, pigments, nanostructured materials, biomaterials, inorganic/polymer composites, organoceramics, metallocenes, disordered systems, liquid crystals, quasicrystals, and layered structures.
The recent prediction and experimental realization of standard type-I Weyl fermions in semimetals by two groups in Princeton and one group in IOP Beijing showed that the resistivity can actually decrease if the electric field is applied in the same direction as the magnetic field, an effect called negative longitudinal magnetoresistance.
Price Monte carlo calculation of electron transport in solids" Semiconductors and semimetals 14: 249-308(1979)