@article{Liu2017, 
author = {Zhifeng Liu and Junyan Liu and Jijun Zhao},
title = {YN2 monolayer: Novel p-state Dirac half metal for high-speed spintronics},
year = {2017},
journal = {Nano Research},
volume = {10},
number = {6},
pages = {1972-1979},
keywords = {spintronics, ferromagnetism, Dirac half metal, YN2 monolayer},
url = {https://www.sciopen.com/article/10.1007/s12274-016-1384-3},
doi = {10.1007/s12274-016-1384-3},
abstract = {In spintronics, it is highly desirable to find new materials that can simultaneously possess complete spin-polarization, high-speed conduction electrons, large Curie temperature, and robust ferromagnetic ground states. Using first-principles calculations, we demonstrate that the stable YN2 monolayer with octahedral coordination is a novel p-state Dirac half metal (DHM), which not only has a fully spin-polarized Dirac state, but also the highest Fermi velocity (3.74 × 105 m/s) of the DHMs reported to date. In addition, its half-metallic gap of 1.53 eV is large enough to prevent the spin-flip transition. Because of the strong nonlocal p orbitals of N atoms (N-p) direct exchange interaction, the Curie temperature reaches over 332 K. Moreover, its ferromagnetic ground state can be well preserved under carrier doping or external strain. Therefore, the YN2 monolayer is a promising DHM for high-speed spintronic devices and would lead to new opportunities in designing other p-state DHMs.}
}