Robust magnetism and crystal structure in Dirac semimetal EuMnBi2under high pressure
Greeshma C Jose1, Weiwei Xie2, Barbara Lavina3,4
1Department of Physics, University of Alabama at Birmingham, Birmingham, AL 35294, United States of America.
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 Mössbauer spectroscopy in151Eu. 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 EuMnBi2sample shows that the tetragonal crystal lattice remains stable up to at least 31.7 GPa.
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