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arXiv · 2402.06850

A review of UTe$_2$ at high magnetic fields

Sylvia K. Lewin·Corey E. Frank·Sheng Ran·Johnpierre Paglione·Nicholas P. Butch
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Abstract

Uranium ditelluride (UTe$_2$) 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 crystallographic $b$ and $c$ axes. 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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Sylvia K. Lewin, Corey E. Frank, Sheng Ran, Johnpierre Paglione, Nicholas P. Butch. 2024-02-10. A review of UTe$_2$ at high magnetic fields. https://doi.org/10.1088/1361-6633/acfb93

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