Buchbesprechungen

Wybrane piety w Małopolsce z okresu średniowiecza. Ich proweniencja, dzieje i wizerunek

“…Po tej dekoronacji, Limanowa stała w obliczu rekoronacji, której miał dokonać w Roku Jubileuszu Odkupienia w 1983 roku, po raz drugi ten sam koronator. Teraz już jako Papież Jan Paweł II 31 .…”

Influence of tunnelling through barriers on grain boundaries on hole mobility in polycrystalline tellurium films

“…3. It can be easily shown that using (13) (curve for p + a) the following expression (given in [7]) can be approximated for gjo 2 3.5 by:…”

“…For the calculation of the tunnelling currents some approximations for the permeability coefficient D are often used. They enable to express the solution of the integrals in (7) and (12), respectively, by known functions. I n this Appendix we intend to mention two approximations often applied and their influence on the accuracy of the pbT calculation.…”

“…This assumption is confirnied by the experimentally found voltage dependence of the mobility [ 5 ] . The theoretical solution of the barrier influence on the carrier mobility was presented first of all by Petritz [GI for the case in which the grain resistivity may be neglected and later on by Bednarczyk and Bednarczyk [ 7 ] for the case in which neglecting the grain resistivity is not possible. A theory presented recently satisfies well the experimental curves p ( T ) in the temperature range 150 to 350 K 141.…”

Temperature dependence of hole mobilities in Te thin films

“…The last group of authors to which Okuyama and Kumagai [5], Capers where ,ul is considered as the mobility in crystallites (of a single crystal with equal concentration of defects and inlpurities) and a = 1. Bednarczyk and Bednarczyk [12] dealt with the problem of the form of a pre-exponential factor and found out that the relation ( 2 ) is valid in the case that the mean distance between barriers is smaller than the mean free path of carriers. If, on the other hand, (D) > 1 the scattering in the grains cannot be neglected any more.…”