Journal
PHYSICAL REVIEW B
Volume 93, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.93.241106
Keywords
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Funding
- Deutsche Forschungsgemeinschaft DFG Topological Insulators [EB 518/1-1, DFG-SPP 1666]
- ERC (Idea Heusler) [291472]
- [DFG SFB 1143]
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Topological insulators are characterized by an inverted band structure in the bulk and metallic surface states on the surface. In LaBi, a semimetal with a band inversion equivalent to a topological insulator, we observe surface-state-like behavior in the magnetoresistance. The electrons responsible for this pseudo-two-dimensional transport, however, originate from the bulk states rather topological surface states, which is witnessed by the angle-dependent quantum oscillations of the magnetoresistance and ab initio calculations. As a consequence, the magnetoresistance exhibits strong anisotropy with large amplitude (similar to 10(5)%).
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