Novel phenomena in magnetically-intercalated graphite has been a subject of much research, pioneered and promoted by M.~S. and G.~Dresselhaus and many others in the 1980s. Among the most enigmatic findings of that era was a dramatic, roller-coaster-like behavior of the magnetoresistivity in EuC6 compound, in which magnetic Eu2+ ions form a triangular lattice that is commensurate to graphite honeycomb planes. In this study, we provide a long-awaited {\it microscopic} explanation of this behavior, demonstrating that the resistivity of EuC6 is dominated by spin excitations in Eu-planes and their highly nontrivial evolution with the magnetic field. Together with our theoretical analysis, the present study showcases the power of the synthetic 2D materials as a source of potentially significant insights into the nature of exotic spin excitations.
@article{arxiv.2109.10916,
title = {Roller-Coaster in a Flatland: Magnetoresistivity in Eu-intercalated Graphite},
author = {A. L. Chernyshev and O. A. Starykh},
journal= {arXiv preprint arXiv:2109.10916},
year = {2022}
}
Comments
Nearly accepted version. +1.5 new pages (36 total) of immense pedagogical power. Embedded