Abstract:Bulk Dirac semimetals (DSMs) exhibit
unconventional transport properties
and phase transitions due to their peculiar low-energy band structure,
yet the electronic interactions governing nonequilibrium phenomena
in DSMs are not fully understood. Here we show that electron–phonon
(e–ph) interactions in a prototypical bulk
DSM, Na3Bi, are predominantly two-dimensional (2D). Our
first-principles calculations reveal a 2D optical phonon with strong e–ph interactions associated with in-plane vibrations
of Na atoms. W… Show more
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