title: Strain-modulated ferromagnetism and band gap of Mn doped Bi2Se3.
abstract: The quantized anomalous Hall effect (QAHE) have been theoretically predicted and experimentally confirmed in magnetic topological insulators (TI), but dissipative channels resulted by small-size band gap and weak ferromagnetism make QAHE be measured only at extremely low temperature (<0.1 K). Through density functional theory calculations, we systemically study of the magnetic properties and electronic structures of Mn doped Bi2Se3 with in-plane and out-of-plane strains. It is found that out-of-plane tensile strain not only improve ferromagnetism, but also enlarge Dirac-mass gap (up to 65.6 meV under 6% strain, which is higher than the thermal motion energy at room temperature ~26 meV) in the Mn doped Bi2Se3. Furthermore, the underlying mechanisms of these tunable properties are also discussed. This work provides a new route to realize high-temperature QAHE and paves the way towards novel quantum electronic device applications.
authors.affiliation: School of Chemistry and Materials Science, Shanxi Normal University, Linfen, Shanxi 041004, China.
authors.forename: Shifei
authors.initials: S
authors.lastname: Qi
authors.affiliation: School of Chemistry and Materials Science, Shanxi Normal University, Linfen, Shanxi 041004, China.
authors.forename: Hualing
authors.initials: H
authors.lastname: Yang
authors.affiliation: School of Chemistry and Materials Science, Shanxi Normal University, Linfen, Shanxi 041004, China.
authors.forename: Juan
authors.initials: J
authors.lastname: Chen
authors.affiliation: School of Chemistry and Materials Science, Shanxi Normal University, Linfen, Shanxi 041004, China.
authors.forename: Xiaoyang
authors.initials: X
authors.lastname: Zhang
authors.affiliation: School of Chemistry and Materials Science, Shanxi Normal University, Linfen, Shanxi 041004, China.
authors.forename: Yingping
authors.initials: Y
authors.lastname: Yang
authors.affiliation: School of Chemistry and Materials Science, Shanxi Normal University, Linfen, Shanxi 041004, China.
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Xu