Universality of Plasmon Excitations in Dirac Semimetals.
Phys Rev Lett
; 115(23): 236402, 2015 Dec 04.
Article
em En
| MEDLINE
| ID: mdl-26684129
ABSTRACT
We investigate the properties of the collective plasmon excitations in Dirac semimetals by using the methods of relativistic field theory. We find a strong and narrow plasmon excitation whose frequency is in the terahertz (THz) range which may be important for practical applications. The properties of the plasmon appear universal for all Dirac semimetals, due to the large degeneracy of the quasiparticles and the small Fermi velocity, v_{F}âªc. This universality is closely analogous to the phenomenon of "dimensional transmutation" that is responsible for the emergence of dimensionful scales in relativistic field theories such as quantum chromodynamics.
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Base de dados:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Estados Unidos