Superconductivity in nitrogen-doped 3C-SiC from first-principles calculations.
- Resource Type
- Article
- Authors
- Liu, Ning; Wang, Wenjun; Guo, Liwei; Peng, Tonghua; Chen, Xiaolong
- Source
- Modern Physics Letters B. Apr2017, Vol. 31 Issue 12, p-1. 8p.
- Subject
- *SURFACE recombination
*PHOTOCONDUCTIVITY
*LATTICE dynamics
*DARK conductivity
*ELECTRONS
- Language
- ISSN
- 0217-9849
The electronic structure and the lattice dynamics of N-doped 3C-SiC have been studied using the first-principles calculations. Electrons are introduced to the conduction band bottom at the X-point of the Brillouin zone. It is revealed that the acoustical modes and optical modes soften upon N doping. The softened acoustical modes contribute over twice of what the optical modes do to the electron-phonon coupling strength. We predict that the superconductivity will occur with N doping concentration beyond about 3 at.% and the transition temperature can reach 11.36 K upon doping of N at about 5 at.% for 3C-SiC. [ABSTRACT FROM AUTHOR]