Hopping activation energy

The treatment of the time-dependent equation (4.1.23) has shown [55] that the transient kinetics is controlled by three parameters the ratio of the diffusion coefficients, D = D T2)/D T ) = exp(— a<5iyif)) (5T = T2 — T is temperature increment), oor /D and r /D. The first parameter, >, defines an increase in recombination intensity I(T2)/I(T ) (vertical scale) and thus permits us to get the hopping activation energy Ea. The parameter r /D could be found by fitting the calculated transient time to the experimentally observed one (horizontal scale). 

With respect to the electronic structure, several influences of the C atoms are indicated in the quotient reflectivity spectrum in Fig. 25 (114). Most important for the transport properties are the effects at and within the band gap. The interband photoconductivity (105) increases, the spin density of trapped electrons increases (see Ref. 58), and the hopping activation energy (see... 

For highly ordered 3D systems, Terril et al. showed that the electron-hopping conductivity depends on the activation energy of the electron transfer and the electronic coupling term [3 [71]. They took the latter as a... 

Fig. 11 63CuMAS-NMR at 9.0 kHz spinning speed, partial spectra of y-Cul (ZB structure) diluted in an inert matrix, showing broadening of first three STs as temperature is increased. The spectra shift to the right due to the temperature dependence of the chemical shift. Quantitative analysis of the broadening yields an activation energy for Cu+ hopping of 0.64 eV. Reprinted from [122]...

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