Self-Trapped Excitons by K.S. Song, Richard T. Williams, Y. Toyozawa

By K.S. Song, Richard T. Williams, Y. Toyozawa

Self-Trapped Excitons discusses the constitution and evolution of the self-trapped exciton (STE) in quite a lot of fabrics. It contains a entire overview of experiments and huge tables of information. Emphasis is given all through to the cohesion of the fundamental physics underlying numerous manifestations of self-trapping, with the speculation being constructed from a localized, atomistic standpoint. the subjects taken care of intimately relating to STE rest contain spontaneous symmetry breaking, lattice illness formation, radiation harm, and digital sputtering.

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Extra resources for Self-Trapped Excitons

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Other materials have been reviewed here for the value of intercomparison, since some of the similarities of selftrapping phenomena among disparate materials are quite remarkable, and some of the disparities among similar materials are very informative. 2 Investigation of Self-Trapped Excitons from a Defect Perspective In the previous chapter, we surveyed the criteriaJor self-trapping, starting from delocalized electron and exciton states in the solid and considering effects of short-range and long-range coupling to phonons.

That is, an electron occupying the bottom of the conduction band is at a higher potential energy than the vacuum, and can escape the solid with finite kinetic energy (about 1 eV from Ne). 36]. 41 2 Investigation of Self-Trapped Excitons from a Defect Perspective Recently, Nistor et al. 37] have reported on the first self-trapped electron observed in an ionic halide crystal. They found, through magnetic resonance studies, that in PbCl z, a layered compound, the electron is self-trapped as Pb~+ and represents a strongly anisotropic paramagnetic center.

1. Summary of the energy differences E a , E. and Eh defined in Fig. 2, the halogen-halogen bon( length do, and spin Hamiltonian parameters for Vk centers in alkali halides. The energy differences [eV were determined either from optical measurements and/or 9 shifts from EPR. 21]. [eV] E~"[eV] do [A] Yz y, Y,. 4 140 140 141 38 2 Investigation of Self-Trapped Excitons from a Defect Perspective Because of the anisotropy of the hyperfine tensor, with the strongest component along the Ci l bond axis (z), the hyperfine pattern from the two orientations of centers perpendicular to the <100) H field (Fig.

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