Magneto-optical Conductance of Kane Fermion Gas in Low Frequencies
arXiv:1901.06649 · doi:10.1088/1367-2630/ab358c
The authors compute the magneto‑optical conductance of a Kane fermion gas and show that gapless Landau‑level modes produce resonant peaks at low frequencies, which match the observed absorbance spectrum of Hg$_{1-x}$Cd$_x$Te.
Abstract
Kane fermion is the counterpart of the Dirac fermion with pseudospin-1. Due to the existence of a bunch of gapless modes associated with Landau levels, the magnetic transport property of Kane fermion gas is very different from that of the Dirac semimetal. We calculate the magneto-optical conductance of the Kane fermion gas. We find that these gapless modes will contribute to a series of resonant peaks in low frequencies. We find that these peaks can explain the low frequency absorbance spectrum in a recent experiment for the Kane fermion material Hg$_{1-x}$Cd$_x$Te.
11 pages, 8 figures; published version