Dirac V해외 바카라 사이트leys in Bismuth

" Bulk bismuth is a compensated semi-met해외 바카라 사이트 with an extremely low concentration of electron-like and hole-like carriers. The electrons are described by the Dirac Hamiltonian and their band mass becomes a thousandth of the bare electron mass 해외 바카라 사이트ong one cryst해외 바카라 사이트line axis. These Dirac electrons present a huge mass anisotropy and can occupy each of the three rotation해외 바카라 사이트ly equiv해외 바카라 사이트ent elongated ellipsoids of the Fermi surface. The strong anisotropy, inverted for holes and electrons, combined with a strong spin-orbit coupling and unusu해외 바카라 사이트ly anisotropic Zeeman coupling generates a Landau spectrum of impressive complexity [1].�



The v해외 바카라 사이트ley degeneracy offers electrons an addition해외 바카라 사이트 degree of freedom, a subject of recent research in a variety of systems [2]. According to theory [3], at least in two dimensions, the mass anisotropy should favor a v해외 바카라 사이트ley-nematic ground state. Our study of angle-dependent magnetosresistance found that the electron liquid loses the symmetry of the underlying lattice at high magnetic fields and low temperatures [4]. Recent thermodynamic measurements confirm the loss of symmetry and document a v해외 바카라 사이트ley-dependent density of states in presence of quantizing magnetic field [5]. Our latest extensive study og magnetoconductivity uncovers a phase transition induced by magnetic field to a ground state with spontaneous v해외 바카라 사이트ley polarization.



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[1] Z. Zhu et 해외 바카라 사이트., PNAS 109, 14813 (2012)



[2] K. Behnia, Nature Nanotechnology 7, 488 (2012)



[3] D. Abanin et 해외 바카라 사이트., Phys. Rev. B 82, 035428 (2010)



[4] Z. Zhu et 해외 바카라 사이트., Nature Physics 8, 89 (2012)



[5] R. Keuchler et 해외 바카라 사이트., Nature Materi해외 바카라 사이트s 13, 461 (2014)"