Journal
PHYSICS LETTERS A
Volume 379, Issue 5, Pages 417-420Publisher
ELSEVIER
DOI: 10.1016/j.physleta.2014.11.032
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Funding
- 973-project [2011CB921803]
- National Natural Science Foundation of China [61171011, 11204131]
- Natural Science Foundation of Shanghai [14ZR1403400]
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Effects of Se vacancies (vSes) on structural and magnetic properties of Fe-doped Bi2Se3 topological insulators are investigated with density-functional theory. It is found both the Fe-Fe dopants and Fe-vSe tend to form clusters. An antiferromagnetic (AFM) to ferromagnetic (FM) phase transition occurs when two Se vacancies are nearby the Fe-Fe dopants, triggered by Fe-Fe direct interactions and carrier-mediated FM interactions. Our results provide an understanding of magnetism in the magnetic topological insulators with Se vacancies. (C) 2014 Elsevier B.V. All rights reserved.
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