  The confluence between high-energy physics and condensed matter has produced
groundbreaking results via unexpected connections between the two traditionally
disparate areas. In this work, we elucidate additional connectivity between
high-energy and condensed matter physics by examining the interplay between
spin-orbit interactions and local symmetry-breaking magnetic order in the
magnetotransport of thin-film magnetic semimetal FeRh. We show that the change
in sign of the normalized longitudinal magnetoresistance observed as a function
of increasing in-plane magnetic field results from changes in the Fermi surface
morphology. We demonstrate that the geometric distortions in the Fermi surface
morphology are more clearly understood via the presence of pseudogravitational
fields in the low-energy theory. The pseudogravitational connection provides
additional insights into the origins of a ubiquitous phenomenon observed in
many common magnetic materials and points to an alternative methodology for
understanding phenomena in locally-ordered materials with strong spin-orbit
interactions.

Mesoscale and Nanoscale Physics