Abstract
We have measured the Hall effect, magnetotransport, and magnetostriction on the field-induced phases of single-crystalline in magnetic fields up to 60 T at temperatures down to 50 mK, firmly establishing the phase diagram for magnetic fields and axes. Moreover, for the axis we observe strong changes in the Hall effect at the phase boundaries. From a comparison to band structure calculations utilizing the concept of a dual nature of the uranium electrons, we propose that these represent field-induced topological changes of the Fermi surface due to at least one Lifshitz transition. Furthermore, we find a unique history dependence of the magnetotransport and magnetostriction data, indicating that the proposed Lifshitz-type transition is of a discontinuous nature, as predicted for interacting electron systems.
3 More- Received 8 November 2016
- Revised 30 January 2017
DOI:https://doi.org/10.1103/PhysRevB.95.134422
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