Evidence of the stability of Mo_{2}TiAlC_{2} from first principles   calculations and its thermodynamical and optical properties
  The elastic, thermodynamic, and optical properties of Mo_{2}TiAlC_{2} are investigated by first-principles calculations. Our results indicate that the a axis is stiffer than c axis within 0~100 GPa. Elastic constants calculations predict the large stability range of Mo_{2}TiAlC_{2} under pressure. Several important thermodynamic properties are discussed detailedly, including the Debye temperature, thermal expansion coefficient, and heat capacity etc. The bonding properties are studied from the elastic quantities and electronic properties. The electronic properties are investigated, including the energy band structure, density of states, and so on. The evidence of the instability of Mo_{3}AlC_{2} and stability of Mo_{2}TiAlC_{2} are successfully obtained. 
Qinghe Gao, Zhijun Xu, Ling Tang, Xianjun Zuo, Guozhu Jia, An Du,   Rongfeng Linghu, Yundong Guo, and Zejin Yang
cond-mat.mes-hall cond-mat.mtrl-sci