Structural stability and vibrational characteristics of CaB6 under high pressure
Liu Mingkun, Tian Can, Huang Xiaoli †, Li Fangfei, Huang Yanping, Liu Bingbing, Cui Tian
       

(a) The Raman spectra of CaB6 measured under ambient pressure, and panels (b), (c), and (d) represent T2g, Eg, and A1g vibration modes, respectively.