Determination of Band Structure of Some Alkali Halide Crystals by Electron‐Nuclear Double Resonance (ENDOR) Data on F‐Centres

Abstract

In previous works (1 to 3) a method has been developed for determining effective masses, pi (i = 1 , 2, 3), of a conduction electron, and the position of its energy minima in %space, 4L the experimentally measured values of the wave function of a localized electron (j valley number), by using ENDOR data. In this method oj 0 (# ) in the nucleus position, ?y are compared with the theoretically calculatedwave function y(lr , pi, 12 ).The following &pression is considered for comparison:Here, N number of terms in the sum, p and q coordination sphere numbers of the nuclei on which ENDOR is measured. The quantity f is a measure for the deviation of theory from experiment. Therefore, the parameters pi and C a r e found from the condition of the absolute minimum of the quantity f. In the present paper for the first time results of band structure investigatioim in

Dislocation Paths in a Magnetic Field

“…Assuming a typical value of Δ g ∼ 10 -3 , 19 eq 7 with such H A value produces the HFI constant A ∼ 4 to 7 × 10 -4 T ∼ 10 to 20 MHz. Such A values are quite reasonable and close to the HFI constants for various paramagnetic impurities and color centers in ionic crystals. − …”

“…Such A values are quite reasonable and close to the HFI constants for various paramagnetic impurities and color centers in ionic crystals. [34][35][36] Figure 1 presents a comparison of the theoretically calculated dependence of the dislocation path lengths (eq 9) with the experimental data for NaCl by Golovin et al 14 Here H A ) 0.35 T and H m ) 5 T. The values L(0) ) 12.2 µm and τ/T 1,2 ) 270 are found by fitting the function (eq 9) at H ) 0 and H ) 0.8 T. One can see that the function L(H) agrees well with the experimental data in the whole range of the H values.…”