Journal Article

PUBDB-2018-02395

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Coupling of magnetic order and charge transport in the candidate Dirac semimetal $\mathrm{EuCd_{2}As_{2}}$

Rahn, M. (Corresponding author) ; Soh, J. R.Extern* ; Francoual, S.DESY* ; Veiga, L. ; Strempfer, J.Extern* ; Mardegan, J. ; Yan, D. Y. ; Guo, Y. F. ; Shi, Y. G. ; Boothroyd, A.Extern*

2018
APS Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevB.97.214422  doi:10.3204/PUBDB-2018-02395

Abstract: We use resonant elastic x-ray scattering to determine the evolution of magnetic order in $\mathrm{EuCd_{2}As_{2}}$ below $\mathrm{T_N} = 9.5$ 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 $\mathrm{Cd_{3}As_2}$ is also present in $\mathrm{EuCd_{2}As_{2}}$, but is gapped for $\mathrm{T < T_N}$ due to the breaking of $\mathrm{C_3}$ symmetry by the magnetic structure.

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Contributing Institute(s):

1. DOOR-User (DOOR)
2. Experimentebetreuung PETRA III (FS-PE)

Research Program(s):

1. 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) (POF3-621)
2. 6G3 - PETRA III (POF3-622) (POF3-622)

Experiment(s):

1. PETRA Beamline P09 (PETRA III)

Appears in the scientific report 2018

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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