Landau level splitting in Cd3As2 under high magnetic fields.
作者： Junzhi Cao , Sihang Liang , Cheng Zhang , Yanwen Liu , Junwei Huang
DOI: 10.1038/NCOMMS8779
关键词:
摘要: Three-dimensional topological Dirac semimetals (TDSs) are a new kind of materials that exhibit linear energy dispersion in the bulk and can be viewed as three-dimensional graphene. It has been proposed TDSs driven to other exotic phases like Weyl semimetals, insulators superconductors by breaking certain symmetries. Here we report first transport experiment on Landau level splitting TDS Cd3As2 single crystals under high magnetic fields, suggesting removal spin degeneracy time reversal symmetry. The detected Berry phase develops an evident angular dependence possesses crossover from non-trivial trivial state strong hint for fierce competition between orbit-coupled field strength field-generated mass term. Our results unveil important role symmetry further demonstrate feasible path generate semimetal
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