Robust magnetism and crystal structure in Dirac semimetal EuMnBi2 under high pressure
Journal of Physics: Condensed Matter(2024)
摘要
Abstract Dirac materials offer exciting opportunities to explore low-energy
carrier dynamics and novel physical phenomena, especially their interaction with
magnetism. In this context, this work focuses on studies of pressure control on the
magnetic state of EuMnBi2, a representative magnetic Dirac semimetal, through
time-domain synchrotron M¨ossbauer spectroscopy in 151Eu. Contrary to the
previous report that the antiferromagnetic order is suppressed by pressure above
4 GPa, we have observed robust magnetic order up to 33.1 GPa. Synchrotron-based
x-ray diffraction experiment on a pure EuMnBi2 sample shows that the
tetragonal crystal lattice remains stable up to 31.7 GPa.
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