Details

Autor(en) / Beteiligte

• Grachtrup, D Schulze
• Steinki, N
• Süllow, S
• Cakir, Z
• Zwicknagl, G
• Krupko, Y
• Sheikin, I
• Jaime, M
• Mydosh, J A

Titel

Magnetic phase diagram and electronic structure of UPt2Si2 at high magnetic fields: A possible field-induced Lifshitz transition

Ist Teil von

• Physical review. B, 2017-04, Vol.95 (13), p.134422

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2017

Quelle

American Physical Society

Beschreibungen/Notizen

• We have measured the Hall effect, magnetotransport, and magnetostriction on the field-induced phases of single-crystalline UPt2Si2 in magnetic fields up to 60 T at temperatures down to 50 mK, firmly establishing the phase diagram for magnetic fields B∥a and c axes. Moreover, for the B∥c 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 5f 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.