Coupling of magnetic order and charge transport in the candidate Dirac semimetal EuCd2As2
Abstract
We use resonant elastic x-ray scattering to determine the evolution of magnetic order in EuCd2As2 below TN=9.5\,K, as a function of temperature and applied magnetic field. We find an A-type antiferromagneticstructure with in-plane magnetic moments, and observe dramatic magnetoresistive effects associated with field-induced changes in the magnetic structure and domain populations. Our ab initio electronic structure calculations indicate that the Dirac dispersion found in the nonmagnetic Dirac semimetal Cd3As2 is also present in EuCd2As2, but is gapped for T < TN due to the breaking of C3 symmetry by the magnetic structure.
Turn this paper into a lesson
ArcXiv compiles a structured reading guide from this paper's metadata: plain-English importance, contributions, prerequisite concepts, which sections to read first, flashcards, and a quiz. Grounded in the abstract, never invented.