dc.contributor.author | Hirahara, T. | |
dc.contributor.author | Otrokov, Mikhail M. | |
dc.contributor.author | Sasaki, T. T. | |
dc.contributor.author | Sumida, K. | |
dc.contributor.author | Tomohiro, Y. | |
dc.contributor.author | Kusaka, S. | |
dc.contributor.author | Okuyama, Y. | |
dc.contributor.author | Ichinokura, S. | |
dc.contributor.author | Kobayashi, M. | |
dc.contributor.author | Takeda, Y. | |
dc.contributor.author | Amemiya, K. | |
dc.contributor.author | Shirasawa, T. | |
dc.contributor.author | Ideta, S. | |
dc.contributor.author | Miyamoto, K. | |
dc.contributor.author | Tanaka, K. | |
dc.contributor.author | Kuroda, S. | |
dc.contributor.author | Okuda, T. | |
dc.contributor.author | Hono, K. | |
dc.contributor.author | Eremeev, S. V. | |
dc.contributor.author | Chulkov, Evgueni V. | |
dc.date.accessioned | 2021-02-22T09:21:41Z | |
dc.date.available | 2021-02-22T09:21:41Z | |
dc.date.issued | 2020-09-24 | |
dc.identifier.citation | Nature Communications 11(1) : (2020) // Article ID 4821 | es_ES |
dc.identifier.issn | 2041-1723 | |
dc.identifier.uri | http://hdl.handle.net/10810/50253 | |
dc.description.abstract | Materials that possess nontrivial topology and magnetism is known to exhibit exotic quantum phenomena such as the quantum anomalous Hall effect. Here, we fabricate a novel magnetic topological heterostructure Mn4Bi2Te7/Bi2Te3 where multiple magnetic layers are inserted into the topmost quintuple layer of the original topological insulator Bi2Te3. A massive Dirac cone (DC) with a gap of 40-75meV at 16K is observed. By tracing the temperature evolution, this gap is shown to gradually decrease with increasing temperature and a blunt transition from a massive to a massless DC occurs around 200-250K. Structural analysis shows that the samples also contain MnBi2Te4/Bi2Te3. Magnetic measurements show that there are two distinct Mn components in the system that corresponds to the two heterostructures; MnBi2Te4/Bi2Te3 is paramagnetic at 6K while Mn4Bi2Te7/Bi2Te3 is ferromagnetic with a negative hysteresis (critical temperature similar to 20K). This novel heterostructure is potentially important for future device applications. | es_ES |
dc.description.sponsorship | T.H. was supported by JSPS KAKENHI Grant Number 18H03877, the Murata Science Foundation (No. H30-084), the Asahi Glass Foundation, Tokyo Tech. Challenging Research Award, and the Iketani Science and Technology Foundation (No. 0321083-A). M.K. was supported by the Spintronics Research Network of Japan (Spin-RNJ). The ARPES measurements were performed under the UVSOR proposal Nos. 29-837, 30-571, 30-860 and the SARPES measurements were performed under the HiSOR proposal No. 16BG001. The XMCD measurements were performed at JAEA beamline BL-23SU in SPring-8 (Proposal No. 2018B3843) and also at PF-KEK (PF PAC No. 17P006). The work at SPring-8 was performed under the Shared Use Program of JAEA Facilities (Proposal No. 2018B-E21) with the approval of Nanotechnology Platform project supported by the Ministry of Education, Culture, Sports, Science and Technology (Proposal No. A-18-AE-0039). The support by Tomsk State University competitiveness improvement program (No. 8.1.01.2018), the Saint Petersburg State University (Project ID 51126254), the Russian Science Foundation (Grant No. 18-12-00169) and the Government research assignment for ISPMS SB RAS, project No. III.23.2.9 is gratefully acknowledged. M.M.O. acknowledges the support by Spanish Ministerio de Ciencia e Innovacion (Grant No. PID2019-103910GB-I00). | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Nature | es_ES |
dc.relation | info:eu-repo/grantAgreement/MICINN/PID2019-103910GB-I00 | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ | * |
dc.subject | gap | es_ES |
dc.title | Fabrication of a Novel Magnetic Topological Heterostructure and Temperature Evolution of its Massive Dirac Cone | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0) | es_ES |
dc.rights.holder | Atribución 3.0 España | * |
dc.relation.publisherversion | https://www.nature.com/articles/s41467-020-18645-9 | es_ES |
dc.identifier.doi | 10.1038/s41467-020-18645-9 | |
dc.departamentoes | Física de materiales | es_ES |
dc.departamentoeu | Materialen fisika | es_ES |