Temperature Dependent Electronic Structure in a Higher Order Topological Insulator Candidate EuIn${}_2$As${}_2$

Abstract

The higher order topological insulator (HOTI) has enticed enormous research interests owing to its novelty in supporting gapless states along the hinges of the crystal. Despite several theoretical predictions, enough experimental confirmation of HOTI state in crystalline solids is still lacking. It has been well known that interplay between topology and magnetism can give rise to various magnetic topological states including HOTI and Axion insulator states. Here using the high-resolution angle-resolved photoemission spectroscopy (ARPES) combined with the first-principles calculations, we report a systematic study on the electronic band topology across the magnetic phase transition in EuIn2As2 which possesses an antiferromagnetic ground state below 16 K. Antiferromagnetic EuIn2As2 has been predicted to host both the Axion insulator and HOTI phase. Our experimental results show the clear signature of the evolution of the topological state across the magnetic transition. Our study thus especially suited to understand the interaction of higher order topology with magnetism in materials.

arXiv comment6 pages, 4 figures

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Cited by in corpus (28)

• Magnetic crystalline-symmetry-protected axion electrodynamics and field-tunable unpinned Dirac cones in EuIn2As2
• Ab-initio overestimation of the topological region in Eu-based compounds
• Field-induced Topological Hall effect in antiferromagnetic axion insulator candidate EuIn${}_2$As${}_2$
• Topological electronic structure and spin texture of quasi-one-dimensional higher-order topological insulator Bi4Br4
• Higher-order Fabry-Pérot Interferometer from Topological Hinge States
• Intrinsic Magnetic Topological Materials
• Theory of inversion-${\mathbb{Z}}_4$ protected topological chiral hinge states and its applications to layered antiferromagnets
• Pressure-induced Superconductivity in Zintl Topological Insulator SrIn2As2
• Symmetry-breaking pathway towards the unpinned broken helix
• Surface state evolution induced by magnetic order in axion insulator candidate EuIn2As2
• Infrared study of the interplay of charge, spin, and lattice excitations in the magnetic topological insulator EuIn${}_2$As${}_2$
• Thermal and mechanical properties and the structural phase transition under pressure in $A$In${}_2$As${}_2$ ($A$ = Ca, Sr, Ba)
• Incommensurate broken helix induced by nonstoichiometry in the axion insulator candidate EuIn${}_2$As${}_2$
• Temperature effects in topological insulators of transition metal dichalcogenide monolayers
• Exploring Intrinsic Magnetic Topological Insulators: The Case of EuIn${}_2$As${}_2$
• Complex Fermiology and Electronic Structure of Antiferromagnet EuSnP
• Infrared study of the layered, magnetic insulator Mn(Bi${}_{0.07}$Sb${}_{0.93}$)${}_2$Te${}_4$ at low temperatures
• Observation of multiple Dirac states in a magnetic topological material EuMg2Bi2
• Observation of paramagnetic spin-degeneracy lifting in EuZn2Sb2
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• Emergent inductors in non-helical magnets
• Floquet topological phases with time-reversal and space inversion symmetries and dynamical detection of topological charges
• Non-relativistic linear Edelstein effect in helical EuIn2As2
• Spin separation and filtering assisted by topological corner states in the Kekulé lattice
• Revealing the intrinsic electronic structure and complex fermiology of YRu2Si2 using angle-resolved photoemission spectroscopy
• Topological electronic structure of YbMg${}_2$Bi${}_2$ and CaMg${}_2$Bi${}_2$
• Temperature Dependent Evolution of the Electronic Structure in EuZn2As2 across the Neel Transition
• Magnetically tunable Dirac and Weyl fermions in the Zintl materials family