Berlin 2024 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 67: Unconventional Superconductors
TT 67.7: Talk
Thursday, March 21, 2024, 11:15–11:30, H 3007
The rich superconducting phase diagram of UTe2 — •Alexander Eaton1, Zheyu Wu1, Theodore Weinberger1, Friedrich Malte Grosche1, Andrej Cabla2, and Michal Valiska2 — 1Cavendish Laboratory, University of Cambridge, UK — 2Department of Condensed Matter Physics, Charles University, Prague, Czech Republic
Few materials manifest two or more distinct superconducting phases. Under various conditions of applied pressure and magnetic field tilt angle, the heavy fermion paramagnet UTe2 has been observed to host up to five separate superconducting states. Several of these show numerous characteristics indicative of spin-triplet pairing, which may have important technological applications in the field of quantum computing. This talk will review recent developments in our knowledge of the UTe2 phase diagram, attained from measurements on a new generation of pristine quality crystals grown in a molten salt flux. Our recent high field and high pressure experiments have uncovered new anomalous regions of the multi-dimensional phase space not previously observed in lower quality samples. A discussion will be given as to how these new observations may help point towards possible microscopic theories to reconcile the diverse array of exotic physical phenomena at play in UTe2.
Keywords: Triplet superconductivity; Heavy fermions; High magnetic fields; High pressure