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- W4221140353 abstract "Several recent studies have shown that the anisotropy in the magnetic structure of ${mathrm{EuCd}}_{2}{mathrm{As}}_{2}$ plays a significant role in stabilizing the Weyl nodes. To investigate the relationship between magnetic anisotropy and Weyl physics, we present a comparative study between ${mathrm{EuZn}}_{2}{mathrm{As}}_{2}$ and ${mathrm{EuCd}}_{2}{mathrm{As}}_{2}$ that are isostructural but with different magnetic anisotropy. We performed structural analysis, electronic transport, and magnetization experiments on millimeter-sized single crystals of ${mathrm{EuZn}}_{2}{mathrm{As}}_{2}$, and compared the results to those of ${mathrm{EuCd}}_{2}{mathrm{As}}_{2}$. By combining the first principle calculations and neutron diffraction experiment, we identify the magnetic ground state of ${mathrm{EuZn}}_{2}{mathrm{As}}_{2}$ as A-type antiferromagnetic order with a transition temperature (${T}_{mathrm{N}}$ = 19.6 K) twice that of ${mathrm{EuCd}}_{2}{mathrm{As}}_{2}$. Like ${mathrm{EuCd}}_{2}{mathrm{As}}_{2}$, the negative magnetoresistance of ${mathrm{EuZn}}_{2}{mathrm{As}}_{2}$ is observed after suppressing the resistivity peak at ${T}_{mathrm{N}}$ with increasing fields. However, the anisotropy in both transport and magnetization are much reduced in ${mathrm{EuZn}}_{2}{mathrm{As}}_{2}$. The difference could be ascribed to the weaker spin-orbit coupling, more localized $d$ orbitals, and a larger contribution from the Eu $s$ orbitals in the zinc compound, as suggested by the electronic band calculations. The same band structure effect could be also responsible for the observation of a smaller nonlinear anomalous Hall effect in ${mathrm{EuZn}}_{2}{mathrm{As}}_{2}$ compared to ${mathrm{EuCd}}_{2}{mathrm{As}}_{2}$." @default.
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- W4221140353 date "2022-04-14" @default.
- W4221140353 modified "2023-10-01" @default.
- W4221140353 title "Anisotropy of the magnetic and transport properties of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi mathvariant=normal>EuZn</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>As</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>" @default.
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- W4221140353 doi "https://doi.org/10.1103/physrevb.105.165122" @default.
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