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- W4382021586 abstract "Zintl-phase ${mathrm{EuCd}}_{2}{mathrm{As}}_{2}$ attracts much research interest because it has a potential of manifesting various ideal topological states under external parameters. Here, measurements of resistance, magnetization, Hall, and synchrotron x-ray diffraction at high pressures up to 50.8 GPa in diamond anvil cells are performed on high-quality ${mathrm{EuCd}}_{2}{mathrm{As}}_{2}$ single crystals that display a long-sought intrinsically insulating antiferromagnetic (AFM) ground state. From ambient pressure to 21.0 GPa, the AFM state of ${mathrm{EuCd}}_{2}{mathrm{As}}_{2}$ is stable and the AFM transition temperature of $ensuremath{sim}9.5$ K is raised linearly at a rate of $ensuremath{sim}1.90$ K/GPa. Meanwhile, the insulating conduction behavior is maintained despite that the whole resistance decreases remarkably. Beyond $ensuremath{sim}24.0$ GPa, a ferromagnetic-like metallic state shows up, due to a trigonal $Poverline{3}m1$ to monoclinic $C2/m$ structural transition, and its transition temperature of $ensuremath{sim}150$ K increases linearly at a rate of $ensuremath{sim}0.69$ K/GPa. This high-pressure magnetic metallic state dominates over the pristine AFM insulating one upon completion of the structural transition around 40 GPa. Based on the present data, we construct a temperature-pressure phase diagram for the intrinsically insulating antiferromagnet ${mathrm{EuCd}}_{2}{mathrm{As}}_{2}$, which offers essential insights into the pressure-dependent evolutions of magnetic and transport properties and will stimulate further exploration of the interplay among magnetism and transport, as well as nontrivial topology rooted in their interactions." @default.
- W4382021586 created "2023-06-27" @default.
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- W4382021586 date "2023-06-26" @default.
- W4382021586 modified "2023-10-17" @default.
- W4382021586 title "Temperature-pressure phase diagram of the intrinsically insulating topological antiferromagnet <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>EuCd</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>As</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>" @default.
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- W4382021586 doi "https://doi.org/10.1103/physrevb.107.l241106" @default.
- W4382021586 hasPublicationYear "2023" @default.
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