Native defects in antiferromagnetic topological insulator MnBi2 Te4
Abstract
Using scanning tunneling microscopy and spectroscopy, in this study we visualized the native defects in antiferromagnetic topological insulator MnBi2 Te4. Two native defects, MnBi and BiTe antisites, can be well resolved in the topographic images. MnBi tend to suppress the density of states at the conduction band edge. Spectroscopy imaging reveals a localized peaklike local density of state at ~ 80 meV below the Fermi energy. A careful inspection of topographic and spectroscopic images, combined with density functional theory calculation, suggests this results from BiMn antisites at Mn sites. The random distribution of MnBi and BiMn antisites results in spatial fluctuation of local density of states near the Fermi level in MnBi2 Te4.
- Authors:
-
[1];
[2];
[3];
[1]
- Rutgers Univ., Piscataway, NJ (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division; Univ. of Tennessee, Knoxville, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1747007
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Materials
- Additional Journal Information:
- Journal Volume: 4; Journal Issue: 12; Journal ID: ISSN 2475-9953
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; defects; topological insulators; scanning tunneling microscopy
Citation Formats
Huang, Zengle, Du, Mao-Hua, Yan, Jiaqiang, and Wu, Weida. Native defects in antiferromagnetic topological insulator MnBi2 Te4. United States: N. p., 2020.
Web. doi:10.1103/physrevmaterials.4.121202.
Huang, Zengle, Du, Mao-Hua, Yan, Jiaqiang, & Wu, Weida. Native defects in antiferromagnetic topological insulator MnBi2 Te4. United States. https://doi.org/10.1103/physrevmaterials.4.121202
Huang, Zengle, Du, Mao-Hua, Yan, Jiaqiang, and Wu, Weida. Mon .
"Native defects in antiferromagnetic topological insulator MnBi2 Te4". United States. https://doi.org/10.1103/physrevmaterials.4.121202. https://www.osti.gov/servlets/purl/1747007.
@article{osti_1747007,
title = {Native defects in antiferromagnetic topological insulator MnBi2 Te4},
author = {Huang, Zengle and Du, Mao-Hua and Yan, Jiaqiang and Wu, Weida},
abstractNote = {Using scanning tunneling microscopy and spectroscopy, in this study we visualized the native defects in antiferromagnetic topological insulator MnBi2 Te4. Two native defects, MnBi and BiTe antisites, can be well resolved in the topographic images. MnBi tend to suppress the density of states at the conduction band edge. Spectroscopy imaging reveals a localized peaklike local density of state at ~ 80 meV below the Fermi energy. A careful inspection of topographic and spectroscopic images, combined with density functional theory calculation, suggests this results from BiMn antisites at Mn sites. The random distribution of MnBi and BiMn antisites results in spatial fluctuation of local density of states near the Fermi level in MnBi2 Te4.},
doi = {10.1103/physrevmaterials.4.121202},
journal = {Physical Review Materials},
number = 12,
volume = 4,
place = {United States},
year = {Mon Dec 21 00:00:00 EST 2020},
month = {Mon Dec 21 00:00:00 EST 2020}
}
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