03. 04. 2024 14:10

Alex Eaton » UTe2 in high magnetic fields

Cambridge University, UK


Online link: cesnet.zoom.us Ask R. Colman for password.

Location: Lecture room F2, 1st floor Ke Karlovu 5, Prague 2

The heavy fermion superconductor UTe2 has attracted widespread interest due to its remarkably large upper critical fields and negligible NMR Knight shift change at Tc, pointing to an odd-parity spin-triplet pairing mechanism. The UTe2 phase diagram exhibits three distinct superconducting phases depending on the tilt-angle of the magnetic field, including a very high field superconducting state that extends to fields > 70 T. An optimised crystal growth technique, pioneered by synthesis groups in Tohoku and Prague, has recently produced a new generation of high-quality crystals.  This talk will review our recent measurements of UTe2 in high magnetic fields. Increased sample quality has enabled us to measure de Haas-van Alphen effect quantum oscillations, to map the Fermi surface [1]. Furthermore, through combining experiments up to 41 T in steady fields with pulsed field measurements to 85 T, we have uncovered an extended region of quantum criticality anchoring the high magnetic field superconducting phase landscape of UTe2 [2]. 


[1] Eaton et al, Nat. Commun. 2024
[2] Wu et al, arXiv:2403.02535

Seminar on Magnetism

Group of Magnetism and MGML organizes a regular magnetism seminar.

Usually, we meet
every Wednesday at 14:10
in lecture room F2
Ke Karlovu 5, 121 16 Praha 2.

You are welcome to join us!

If you wish to receive regular updates on fothcoming seminars, contact R. Colman.