A magnetic heterostructure of topological insulators as a candidate for an axion insulator.
Sign Up to like & getrecommendations! Published in 2017 at "Nature materials"
DOI: 10.1038/nmat4855
Abstract: The axion insulator which may exhibit an exotic quantized magnetoelectric effect is one of the most interesting quantum phases predicted for the three-dimensional topological insulator (TI). The axion insulator state is expected to show up… read more here.
Keywords: magnetic heterostructure; axion insulator; heterostructure topological; insulator ... See more keywords
Evidence of magnetism-induced topological protection in the axion insulator candidate EuSn2P2
Sign Up to like & getrecommendations! Published in 2022 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.2116575119
Abstract: Significance Understanding the mutual influence between magnetic and topological properties in a solid system is a fundamental challenge for quantum materials research. The so-called axion insulator is one such case, with exotic properties related to… read more here.
Keywords: axion; topological protection; axion insulator; insulator ... See more keywords
Nonlocal sidewall response and deviation from exact quantization of the topological magnetoelectric effect in axion-insulator thin films
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review B"
DOI: 10.1103/physrevb.104.l201102
Abstract: Topological insulator (TI) thin films with surface magnetism are expected to exhibit a quantized anomalous Hall effect (QAHE) when the magnetizations on the top and bottom surfaces are parallel, and a quantized topological magnetoelectric (QTME)… read more here.
Keywords: axion insulator; response; thin films; effect ... See more keywords
Higher-Order Topology of the Axion Insulator EuIn_{2}As_{2}.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.122.256402
Abstract: Based on first-principles calculations and symmetry analysis, we propose that EuIn_{2}As_{2} is a long-awaited axion insulator with antiferromagnetic (AFM) long-range order. Characterized by the parity-based invariant Z_{4}=2, the topological magnetoelectric effect is quantized with θ=π… read more here.
Keywords: axion insulator; order; topology; euin ... See more keywords
Critical Behavior and Universal Signature of an Axion Insulator State.
Sign Up to like & getrecommendations! Published in 2021 at "Physical review letters"
DOI: 10.1103/physrevlett.126.156601
Abstract: Recently, the search for an axion insulator state in the ferromagnetic-3D topological insulator (TI) heterostructure and MnBi_{2}Te_{4} has attracted intense interest. However, its detection remains difficult in experiments. We systematically investigate the disorder-induced phase transition… read more here.
Keywords: insulator; universal signature; axion insulator; insulator state ... See more keywords