TY - JOUR
T1 - Optical absorption of FA centres in mixed ionic crystals
AU - Lopez-Tellez, E. R.
AU - Cardenas-Garcia, D.
AU - Ruiz-Mejia, C.
AU - Rodriguez-Mijangos, R.
PY - 1990
Y1 - 1990
N2 - The shift with concentration variation of the optical absorption F A band in KCl-KBr mixed crystals, with Li impurities is studied by means of the method of Bartram et al. (1968). The distortion around the F A centre is calculated considering the change in the repulsive and polarisation energies due to the impurity. The energy due to this distortion is obtained by a perturbative method. This correction gives good agreement with the experiment values for one of the two absorption bands of the FA centre, but not for the other. Calculations using several types of wavefunction are in approximate agreement with the experimental observations of Asami and Ishiguro (1986).
AB - The shift with concentration variation of the optical absorption F A band in KCl-KBr mixed crystals, with Li impurities is studied by means of the method of Bartram et al. (1968). The distortion around the F A centre is calculated considering the change in the repulsive and polarisation energies due to the impurity. The energy due to this distortion is obtained by a perturbative method. This correction gives good agreement with the experiment values for one of the two absorption bands of the FA centre, but not for the other. Calculations using several types of wavefunction are in approximate agreement with the experimental observations of Asami and Ishiguro (1986).
UR - http://www.scopus.com/inward/record.url?scp=24844467931&partnerID=8YFLogxK
U2 - 10.1088/0953-8984/2/19/017
DO - 10.1088/0953-8984/2/19/017
M3 - Artículo
SN - 0953-8984
VL - 2
SP - 4513
EP - 4523
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
IS - 19
M1 - 017
ER -