Dynamic magnetotropic coefficient measurements in UTe2

A class of widely studied strongly-correlated materials are heavy fermion systems. These display a rich array of

physical phenomena, often due to the presence of f -electrons. We study UTe₂, an example of a heavy fermion system,

which also exhibits several features consistent with spin-triplet superconductivity. One of the most convincing

features is a re-entrant superconducting state observed in high magnetic fields, ranging from 40-65 Tesla.

An important open question in UTe₂ is what mechanism supports the observed re-entrant superconducting state.

In order to better understand this mechanism, we probe the high field re-entrant superconducting state and the

surrounding magnetic phases using a novel technique that measures the magnetotropic coefficient. In high magnetic

fields, we study how this energy, which is associated with magnetically anisotropic fluctuations, is dissipated across

the high field phase diagram of UTe₂. Our preliminary measurements at 4K show evidence of slow dynamics that

could shed light on the nature of transport behaviour near the re-entrant superconducting state.