Rare earth chalcogenides provide a great platform to study exotic quantum phenomena such as superconductivity and charge density waves. Among various interesting properties, the coupling between magnetism and electronic transport has attracted significant attention. Here, we report the investigation of such coupling in {alpha}-Gd2Se3 single crystals through magnetic, calorimetric, and transport property measurements. {alpha}-Gd2Se3 is found to display an antiferromagnetic ground state below 11 K with metamagnetic spin-flop transitions. The magnetic fluctuations remain strong above the transition temperature. Transport measurements reveal an overall metallic transport behavior with a large negative magnetoresistance of ~ 65% near the magnetic transition temperature, together with positive MR near the field-induced spin-flop transitions, which can be understood in terms of the suppression of spin scattering by the magnetic field.
@article{arxiv.2501.14712,
title = {Large Negative Magnetoresistance in Antiferromagnetic Gd2Se3},
author = {Santosh Karki Chhetri and Gokul Acharya and David Graf and Rabindra Basnet and Sumaya Rahman and M. M. Sharma and Dinesh Upreti and Md Rafique Un Nabi and Serhii Kryvyi and Josh Sakon and Mansour Mortazavi and Bo Da and Hugh Churchill and Jin Hu},
journal= {arXiv preprint arXiv:2501.14712},
year = {2025}
}