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Magnetic properties of the putative higher-order topological insulator EuIn$_2$As$_2$

Tomasz Toliński, Dariusz Kaczorowski

SciPost Phys. Proc. 11, 005 (2023) · published 5 June 2023

Proceedings event

International Conference on Strongly Correlated Electron Systems


In higher-order topological insulator (HOTI), a gap is preserved both for the bulk and the surface states, and only hinges or corners become gapless. Recently, it has been predicted that the antiferromagnetic compound EuIn$_2$As$_2$ can host both the HOTI and axion insulator features. Preliminary experimental confirmation of this finding was obtained using angle-resolved photoemission spectroscopy. The main objective of this work was to characterize the anisotropic magnetic properties of single-crystalline EuIn$_2$As$_2$. In addition, complementary studies on the transport properties, heat capacity, and magnetocaloric effect in this compound were performed.

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