Luminescence of self-trapped excitons in alkali halide crystals at low temperature uniaxial deformation

Exciton-like luminescence of KCl matrix under thermoelastic, local and uniaxial deformation

“…A series of original researches have been carried out under direct impact on the channels of radiative relaxation of electronic excitations (EE) in AHC by lowering symmetry of lattice by local deformation due to various sizes of both homologous cations [7,8] and homologous anions [9,10], uniaxial [11][12][13][14][15][16][17] and comprehensive deformation [18][19][20][21][22][23].…”

Tendencies in ABO3 Perovskite and SrF2, BaF2 and CaF2 Bulk and Surface F-Center Ab Initio Computations at High Symmetry Cubic Structure

“…An ordinary F-center consists of one electron captured by a halogen vacancy [1,2,5]. Such F (Farbe) centers in alkali halides and alkaline-earth halides and oxides have been studied for many decades [1,2,[5][6][7][8][9][10][11][12]. Thus, F-centers are defects in ionic crystals in which an anion is replaced by one or more trapped electrons.…”

“…Thus, F-centers are defects in ionic crystals in which an anion is replaced by one or more trapped electrons. These vacancy-trapped electrons, confined and screened by the surrounding crystal lattice, thus form gap states with unique optical, electrical and magnetic properties [7][8][9][10][11][12][13][14][15][16] that are relevant to different optoelectronic devices. How efficient the formation is of point defects, including F-centers, is also the determining factor of the material radiation resistance in nuclear applications [17][18][19][20][21].…”