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Universality of Plasmon Excitations in Dirac Semimetals

Universality of Plasmon Excitations in Dirac Semimetals

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 …