Physical review letters, 2020-07, Vol.125 (3), p.1
2020
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- Autor(en) / Beteiligte
- Titel
- Robust A-Type Order and Spin-Flop Transition on the Surface of the Antiferromagnetic Topological Insulator MnBi2Te4
- Ist Teil von
- Physical review letters, 2020-07, Vol.125 (3), p.1
- Ort / Verlag
- College Park: American Physical Society
- Erscheinungsjahr
- 2020
- Quelle
- Free E-Journal (出版社公開部分のみ）
- Beschreibungen/Notizen
- Here, we present microscopic evidence of the persistence of uniaxial A -type antiferromagnetic order to the surface layers of MnBi2Te4 single crystals using magnetic force microscopy. Our results reveal termination-dependent magnetic contrast across both surface step edges and domain walls, which can be screened by thin layers of soft magnetism. The robust surface A-type order is further corroborated by the observation of termination-dependent surface spin-flop transitions, which have been theoretically proposed decades ago. Our results not only provide key ingredients for understanding the electronic properties of the antiferromagnetic topological insulator MnBi2Te4, but also open a new paradigm for exploring intrinsic surface metamagnetic transitions in natural antiferromagnets.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0031-9007eISSN: 1079-7114DOI: 10.1103/PhysRevLett.125.037201Titel-ID: cdi_osti_scitechconnect_1638230
- Format
- –
- Schlagworte
- A-type antiferromagnetic order, antiferromagnetic topological insulator, Antiferromagnetism, CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY, Domain walls, Magnetic fields, magnetic force microscopy, Magnetism, MnBi2Te4, Robustness, Single crystals, Surface layers, surface spin-flop transition, Thin films, Topological insulators