Direct Probe of the Ferromagnetic Proximity Effect at the Interface of SnTe/Fe Heterostructure by Polarized Neutron Reflectometry
| Autor: | Ryota Akiyama, Ryo Ishikawa, Kazuhiro Akutsu-Suyama, Ryosuke Nakanishi, Yuta Tomohiro, Kazumi Watanabe, Kazuki Iida, Masanori Mitome, Shuji Hasegawa, Shinji Kuroda |
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| Rok vydání: | 2022 |
| Předmět: |
Condensed Matter - Materials Science
High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Condensed Matter - Mesoscale and Nanoscale Physics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences General Materials Science Physical and Theoretical Chemistry |
| Zdroj: | The journal of physical chemistry letters. 13(35) |
| ISSN: | 1948-7185 |
| Popis: | Introducing magnetic order into a topological insulator (TI) system has been attracting much attention with an expectation of realizing exotic phenomena such as quantum anomalous Hall effect (QAHE) or axion insulator states. The magnetic proximity effect (MPE) is one of the promising schemes to induce the magnetic order on the surface of TI without introducing disorder accompanied by doping magnetic impurities in TI. In this study, we investigate the MPE at the interface of a heterostructure consisting of a topological crystalline insulator (TCI) SnTe and Fe by employing polarized neutron reflectometry. The ferromagnetic order penetrates $\sim$ 3 nm deep into the SnTe layer from the interface with Fe, which persists up to room temperature. Our findings demonstrate that the interfacial magnetism is induced by the MPE on the surface of TCI preserving the coherent topological states, which is essential for the bulk-edge correspondence, without introducing disorder arising from a random distribution magnetic impurities. This opens up a way for realizing next generation electronics, spintronics, and quantum computational devices by making use of the characteristics of TCI. |
| Databáze: | OpenAIRE |
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