@article{11737,
  abstract     = {Spin-orbit coupling in thin HgTe quantum wells results in a relativistic-like electron band structure, making it a versatile solid state platform to observe and control nontrivial electrodynamic phenomena. Here we report an observation of universal terahertz (THz) transparency determined by fine-structure constant α≈1/137 in 6.5-nm-thick HgTe layer, close to the critical thickness separating phases with topologically different electronic band structure. Using THz spectroscopy in a magnetic field we obtain direct evidence of asymmetric spin splitting of the Dirac cone. This particle-hole asymmetry facilitates optical control of edge spin currents in the quantum wells.},
  author       = {Dziom, Uladzislau and Shuvaev, A. and Gospodarič, J. and Novik, E. G. and Dobretsova, A. A. and Mikhailov, N. N. and Kvon, Z. D. and Alpichshev, Zhanybek and Pimenov, A.},
  issn         = {2469-9969},
  journal      = {Physical Review B},
  number       = {4},
  publisher    = {American Physical Society},
  title        = {{Universal transparency and asymmetric spin splitting near the Dirac point in HgTe quantum wells}},
  doi          = {10.1103/PhysRevB.106.045302},
  volume       = {106},
  year         = {2022},
}

@article{12278,
  abstract     = {Mercury telluride (HgTe) thin films with a critical thickness of 6.5 nm are predicted to possess a gapless Dirac-like band structure. We report a comprehensive study on gated and optically doped samples by magnetooptical spectroscopy in the THz range. The quasi-classical analysis of the cyclotron resonance allowed the mapping of the band dispersion of Dirac charge carriers in a broad range of electron and hole doping. A smooth transition through the charge neutrality point between Dirac holes and electrons was observed. An additional peak coming from a second type of holes with an almost density-independent mass of around 0.04m0 was detected in the hole-doping range and attributed to an asymmetric spin splitting of the Dirac cone. Spectroscopic evidence for disorder-induced band energy fluctuations could not be detected in present cyclotron resonance experiments.},
  author       = {Shuvaev, Alexey and Dziom, Uladzislau and Gospodarič, Jan and Novik, Elena G. and Dobretsova, Alena A. and Mikhailov, Nikolay N. and Kvon, Ze Don and Pimenov, Andrei},
  issn         = {2079-4991},
  journal      = {Nanomaterials},
  keywords     = {General Materials Science, General Chemical Engineering},
  number       = {14},
  publisher    = {MDPI},
  title        = {{Band structure near the Dirac Point in HgTe quantum wells with critical thickness}},
  doi          = {10.3390/nano12142492},
  volume       = {12},
  year         = {2022},
}