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Edge-derived magnetisms in very thin non-doped Bi2Te3 nanomesh
- Source :
- Applied Physics Letters. 115:093101
- Publication Year :
- 2019
- Publisher :
- AIP Publishing, 2019.
-
Abstract
- Pristine topological insulators (TIs) with no carrier doping principally suffer from a lack of magnetic ordering. We create a nanomesh structure, a honeycomblike array of hexagonal nanopores with extremely high density, on a nondoped two-dimensional (2D) thin TI (Bi2Te3). We observe antiferromagnetism (AFM) in completely hydrogen-terminated nanomeshes, while it is eliminated by ferromagnetism (FM) in completely O-terminated nanomeshes. Interplay between the AFM and FM is observed in partially O-terminated nanomeshes. As a possible origin for the observed magnetisms, Kramers doublets, which may exist around nanopore edges, for AFM and those eliminated by FM spin alignment due to O-Te coupling along pore edges are discussed based on the structure and annealing dependence of the magnetisms. The nondoped 2D nanomesh formed on a TI will lead to new avenues of research on topological magnetisms and spintronics.
- Subjects :
- 010302 applied physics
Materials science
Physics and Astronomy (miscellaneous)
Condensed matter physics
Spintronics
Annealing (metallurgy)
Doping
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Nanopore
chemistry.chemical_compound
Nanomesh
Ferromagnetism
chemistry
Topological insulator
0103 physical sciences
Antiferromagnetism
Condensed Matter::Strongly Correlated Electrons
0210 nano-technology
Subjects
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 115
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........83760895a48338ead79b853eca211522
- Full Text :
- https://doi.org/10.1063/1.5100024