A review of UTeat high magnetic fields.

Rep Prog Phys

NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, United States of America.

Published: October 2023

Uranium ditelluride (UTe) is recognized as a host material to unconventional spin-triplet superconductivity, but it also exhibits a wealth of additional unusual behavior at high magnetic fields. One of the most prominent signatures of the unconventional superconductivity is a large and anisotropic upper critical field that exceeds the paramagnetic limit. This superconductivity survives to 35 T and is bounded by a discontinuous magnetic transition, which itself is also field-direction-dependent. A different, reentrant superconducting phase emerges only on the high-field side of the magnetic transition, in a range of angles between the crystallographicandaxes. This review discusses the current state of knowledge of these high-field phases, the high-field behavior of the heavy fermion normal state, and other phases that are stabilized by applied pressure.

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http://dx.doi.org/10.1088/1361-6633/acfb93DOI Listing

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