Evolution of the 128-cm−1 Raman phonon mode with temperature in Ba(Fe1– xCo x)2As2 ( x = 0.065 and 0.2) |
Raman spectra for Ba(Fe1− x Co x )2As2 with x = 0.065 (a) and 0.2 (b) respectively in B 1g configuration with respect to 1 Fe unit cell at selected temperatures. |