Magnetism of an electron gas in (2+1) dimensionsстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The properties of a finite-density charged Fermi gas in two spatial dimensions are studied in the presence of a uniform external magnetic field of constant strength. A spin operator commuting with the single-particle Dirac Hamiltonian in (2 + 1) dimensions is introduced. Possible observable effects that are due to vacuum polarization by an external field are discussed. It is shown that, at sufficiently high temperatures, both nonrelativistic and relativistic (2 + 1)-dimensional gases in a uniform magnetic field of arbitrary induction are para-magnetic. Nonetheless, the thermodynamic characteristics of a nonrelativistic gas must display well-known Landau oscillations in rather strong fields at low temperatures. Expressions for basic thermodynamic quantities characterizing a relativistic gas of charged particles and antiparticles in a uniform magnetic field are obtained for finite temperatures