The topological semimetal YPtBi has attracted considerable attention, owing to its novel superconducting and normal state properties. A strong band inversion from spin-orbit coupling allows the existence of j=3/2 quasiparticles near the Fermi level, which form Cooper pairs with angular momentum potentially higher than single or triplet states. In this report, we present high-pressure magnetotransport and Shubnikov-de Haas effect measurements on high-quality YPtBi up to P=2.08 GPa. As a function of pressure, we observe a trend toward more insulating resistivity at low temperatures concomitant with a suppression of quantum oscillation amplitude. Together with a decrease of the upper critical field and significant increase in the Dingle temperature, the pressure-induced changes point to a weakening of the band inversion and potential tuning of the topological nature of YPtBi, suggesting pressure as a useful tool for understanding the nature of topology in other related half-Heusler compounds.
@article{arxiv.2603.11464,
title = {Quantum Oscillations and Superconductivity in YPtBi Under Pressure},
author = {Jared Z. Dans and Prathum Saraf and Lillian Jirousek and Carsyn L. Mueller and Chandra Shekhar and Claudia Felser and Johnpierre Paglione},
journal= {arXiv preprint arXiv:2603.11464},
year = {2026}
}