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- W4281289095 abstract "Topological materials have aroused great interest in recent years, especially when magnetism is involved. Pressure can effectively tune the topological states and possibly induce superconductivity. Here we report the high-pressure study of topological semimetals X Cd 2 Sb 2 ( X = Eu and Yb), which have the same crystal structure. In antiferromagnetic (AFM) Weyl semimetal EuCd 2 Sb 2 , the Néel temperature ( T N ) increases from 7.4 K at ambient pressure to 50.9 K at 14.9 GPa. When pressure is above 14.9 GPa, the AFM peak of resistance disappears, indicating a non-magnetic state. In paramagnetic Dirac semimetal candidate YbCd 2 Sb 2 , pressure-induced superconductivity appears at 1.94 GPa, then T c reaches to a maximum of 1.67 K at 5.22 GPa and drops to zero at about 30 GPa, displaying a dome-shaped temperature–pressure phase diagram. High-pressure x-ray diffraction measurement demonstrates that a crystalline-to-amorphous phase transition occurs at about 16 GPa in YbCd 2 Sb 2 , revealing the robustness of pressure-induced superconductivity against structural instability. Similar structural phase transition may also occur in EuCd 2 Sb 2 , causing the disappearance of magnetism. Our results show that X Cd 2 Sb 2 ( X = Eu and Yb) is a novel platform for exploring the interplay among magnetism, topology, and superconductivity." @default.
- W4281289095 created "2022-05-24" @default.
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- W4281289095 date "2022-07-01" @default.
- W4281289095 modified "2023-09-23" @default.
- W4281289095 title "High-pressure study of topological semimetals XCd<sub>2</sub>Sb<sub>2</sub> (X = Eu and Yb)" @default.
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- W4281289095 doi "https://doi.org/10.1088/1674-1056/ac7212" @default.
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