Coupling of magnetic order and charge transport in the candidate Dirac semimetal EuCd2As2

2018/03/31 by M. C. Rahn, J. -R. Soh, Jian-Rui Soh +13 · 1 citation
Materials Science · Mathematics · Physics and Astronomy · #Ab initio #Ab initio quantum chemistry methods #Charge (physics) #Condensed matter physics #Coupling (piping) #Dirac (video compression format) #Field (mathematics) #Iron-based superconductors research #Magnetic field #Magnetoresistance #Materials science #Mathematics #Order (exchange) #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Scattering #Semimetal #Topological Materials and Phenomena #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.97.214422

published as Phys. Rev. B 97, 214422 (2018) · Supplemental information attached to preprint

openalex created_date 2018/03/29 · openalex publication_date 2018/06/20 · arxiv created 2018/07/03 · arxiv updated 2018/07/04 · openalex updated_date 2026/08/05

Abstract

We use resonant elastic x-ray scattering to determine the evolution of magnetic order in EuCd₂As₂ below T_N=9.5 K, as a function of temperature and applied magnetic field. We find an A-type antiferromagnetic structure 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<T_N due to the breaking of C₃ symmetry by the magnetic structure.

Citations

• Influence of epitaxial strain on the ferromagnetic semiconductorEuO: First-principles calculations
• Recent advances in magnetic structure determination by neutron powder diffraction
• Anomalous Hall effect
• Ho and Fe magnetic ordering in multiferroic HoFe<mml:mrow/>3(BO<mml:mrow/>3)<mml:mrow/>4
• Antiferromagnetic transition inEuFe2As2: A possible parent compound for superconductors
• Special points for Brillouin-zone integrations
• A stable three-dimensional topological Dirac semimetal Cd3As2
• QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials

Cited by

• Topological electronic bands in crystalline solids

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