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Strain-tunable phase transition and doping-induced magnetism in iodinene

Authors :
Huabing Yin
Guanwei Jia
Yuli Yan
Guangbiao Zhang
Bing Wang
Chang Liu
Pengyu Liu
Source :
Applied Physics Letters. 119:102403
Publication Year :
2021
Publisher :
AIP Publishing, 2021.

Abstract

Two-dimensional (2D) ferromagnetic materials with high Curie temperatures (TC) and tunable physical properties are crucial to the development of nanoscale spintronics devices. Here, we investigate the newly synthesized iodinene using first-principles calculations. Our results show that doping carriers in monolayer and bilayer iodinene can easily introduce itinerant ferromagnetism due to a flatband structure near the Fermi level, and that the associated TC is higher than room temperature. Moreover, we find that a structural phase transition can be achieved through the application of moderate tensile strain for both monolayer and bilayer iodinene. The magnetic moment, Curie temperature, band structure, carrier effective mass, and optical absorption can be changed significantly through this phase transition, and the transition can also lead to a magnetic phase transition with an appropriate doping concentration. Our work provides a feasible approach for designing 2D magnetic materials with potential for application in microelectronics devices.

Details

ISSN :
10773118 and 00036951
Volume :
119
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........ec3ebeee66fa8d378f364aecd2d122a4
Full Text :
https://doi.org/10.1063/5.0063802