Angle-resolved Landau spectrum of electrons and holes in bismuth

摘要: In elemental bismuth, emptying the low-index Landau levels is accompanied by giant Nernst quantum oscillations. The response sharply peaks each time a level intersects chemical potential. By studying evolution of these when field rotates in three perpendicular planes defined high-symmetry axes, we have mapped angle-resolved spectrum system up to 12 T. A theoretical model treating electrons at L point with an extended Dirac Hamiltonian confronted experimentally-resolved spectrum. We obtain set parameters yielding good but imperfect agreement between theory and experiment for all orientations magnetic space. results confirm relevance electron pockets settle longstanding uncertainty about magnitude g-factor holes. According our analysis, exceeding 2.5 T applied along bisectrix axis puts carriers their lowest($j=0$) spin-polarized level. On top this complex angle-dependent spectrum, detects additional unexpected unidentified origin.