1. Growth & Characterization
Chromium-induced Ferromagnetism in Topological Crystalline Insulator SnTe Thin Films
Shanshan Liu, Weiyi Wang, Cheng Zhang, lu Sun, Yanwen Liu, Zhi-Gang Chen, Enze Zhang, Xiang Yuan, Jin Zou, Faxian Xiu*
State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai , China
Introduction
Results
Transport data of pure SnTe
Compared to transition-metal doped topological insulator (Bi,Sb)2Te3 of which temperature to achieve a quantized anomalous Hall effect (QAHE) is dramatically restricted to several milli-kelvin, magnetically doped topological crystalline insulator (TCI) SnTe was predicted to possibly possess a high-temperature QAHE state with a much larger quantum Hall conductance. However, the fundamental understanding of the Cr-doping effect and the induced ferromagnetism in this system remains unclear.. Here, we report the high-crystalline magnetic films of Cr-doped SnTe grown by molecular beam epitaxy
Ferromagnetism in Cr0.17Sn0.83Te
Growth & Characterization
SnTe
[111]
Cr0.17Sn0.83Te
[100]
Conclusions
We have produced high-crystalline SnTe and ferromagnetic Cr-doped SnTe thin films with high crystallinity. The ferromagnetic characteristics have been verified by the butterfly-like negative MR and the anomalous Hall effect. In light of the tunable Fermi level in the exemplar Cr-doped (Bi,Sb)2Te3 system, the anomalous Hall effect achieved in our SnTe thin film samples is promising for high-temperature QAHE and the manipulation of Weyl points or Fermi arcs in semimetals upon the proper chemical doping.
*To whom correspondence should be