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Chin. Phys. B, 2018, Vol. 27(7): 077106    DOI: 10.1088/1674-1056/27/7/077106
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Metal-to-insulator transition in two-dimensional ferromagnetic monolayer induced by substrate

Can Qi(齐灿)1,2, Jun Hu(胡军)1,2
1 School of Physical Science and Technology, Soochow University, Suzhou 215006, China;
2 Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou 215006, China
Abstract  

Two-dimensional (2D) ferromagnetic (FM) materials have great potential for applications in next-generation spintronic devices. Since most 2D FM materials come from van der Waals crystals, stabilizing them on a certain substrate without killing the ferromagnetism is still a challenge. Through systematic first-principles calculations, we proposed a new family of 2D FM materials which combines TaX (X=S, Se or Te) monolayer and Al2O3(0001) substrate. The TaX monolayers provide magnetic states and the Al2O3(0001) substrate stabilizes the former. Interestingly, the Al2O3(0001) substrate leads to a metal-to-insulator transition in the TaX monolayers and induces a band gap up to 303 meV. Our study paves the way to explore promising 2D FM materials for practical applications in spintronics devices.

Keywords:  metal-to-insulator transition      two-dimensional monolayer      ferromagnetic material  
Received:  19 March 2018      Revised:  18 April 2018      Accepted manuscript online: 
PACS:  71.30.+h (Metal-insulator transitions and other electronic transitions)  
  73.22.-f (Electronic structure of nanoscale materials and related systems)  
  76.50.+g (Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance)  
Fund: 

Project supported by the National Natural Science Foundation of China (Grant No. 11574223), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20150303), and the Jiangsu Specially-Appointed Professor Program of Jiangsu Province, China.

Corresponding Authors:  Jun Hu     E-mail:  jhu@suda.edu.cn

Cite this article: 

Can Qi(齐灿), Jun Hu(胡军) Metal-to-insulator transition in two-dimensional ferromagnetic monolayer induced by substrate 2018 Chin. Phys. B 27 077106

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