arXiv subjects

I. Vysin

Publications and source records attributed to I. Vysin.

4 recordsLinked to original sources

arXiv2000

Optical Rotatory Dispersion of $α$-quartz

It is shown that some formulae describing optical rotatory dispersion of $α$-quartz with the aid of two Drude's terms reduce to the combined formula containing one Drude's and one Chandrasekhar's term. Comparison of various formulae describing the experimental data of $α$-quartz leads to the conclusion that the optical activity of this crystal is due to its crystal structure only, that means the optical activity is not of molecular origin. Further the rotatory strengths are discussed with the regard to coupled oscillator model and to the structure of $α$-quartz.

cond-mat.mtrl-sci↗

arXiv2000

The Revised Quantum Mechanical Theory of the Optical Activity of Crystals

In this paper we present the revised view on the optical activity of crystals based on the model of two dumped coupled oscillators. The results are compared with the results of the same problem solved before and it is presented that the results of the quantum mechanical model are the generalization of the classical model only and they do not introduce the new terms of quantum mechanical nature. The results are discussed with regard to the rotational strengths of normal modes of vibrations and the formula for the complex rotatory power containing the rotational strengths is presented.

cond-mat.mtrl-sci↗

arXiv2000

Note on the Chandrasekhar Model of the Optical Activity of Crystals

In this paper we discuss more wide applicability of the Chandrasekhar model of coupled oscillators in the optical rotatory dispersion of the crystals. We solve the problem using the Chandrasekhar model of two coupled oscillators in the case when we include all couplings between adjacent oscillators on the helix that is given by the crystal structure. Further we discuss the results of coupled oscillators models in the case of the including of the couplings between even and odd oscillators on the helix. The optical rotatory dispersion results obtained after the approximations of the oscillator strengths verify that these couplings have the important influence on the crystal optical rotatory dispersion.

cond-mat.mtrl-sci↗

arXiv2000

Final Generalization of the Three Coupled Oscillator Model in the Crystal Optical Activity

In this paper we generalize the quantum mechanical model of three coupled oscillators because of its usage in the crystal optical activity. Using this model we can include the influence of all essential couplings between single oscillators which represent the molecules or atoms of optically active crystals belonging for example to the space groups of symmetry D(3,4) or D(3,6). The single oscillators are damped and therefore we can include both parts of the optical activity - optical rotatory dispersion and circular dichroism - into computations. We present more universal formulas for description of the above mentioned parts.

cond-mat.mtrl-sci↗