What Has Been Achieved:
We have demonstrated that a ferromagnetic (FM) phase in Mn(Bi,Sb)2Te4 can be stabilized through controlling defects.
Importance of Achievement:
Our work is an encouraging step towards realizing a FM topological insulator.
Its van der Waals geometry opens up possibilities of forming heterostructures and
gate tuning. Studies that illuminate the synthesis conditions of different magnetic phases in the Mn(Sb,Bi)2Te4 family will also greatly facilitate future explorations of their topological and magnetic properties.
Unique Features of the MIP That Enabled Project:
Growth of high quality bulk single crystals of MnSb1.8Bi0.2Te4 with controlled defects.
Publication: Yangyang Chen, Ya-Wen Chuang, Seng Huat Lee, Yanglin Zhu, Kevin Honz, Yingdong Guan, Yu Wang, Ke Wang, Zhiqiang Mao, Jun Zhu, Colin Heikes, P. Quarterman, Pawel Zajdel, Julie A. Borchers, and William Ratcliff II, Ferromagnetism in van der Waals compound MnSb1.8Bi0.2Te4, Phys. Rev. Mater 4, 064411 (2020).