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Four-component Hartree-Fock calculations of magnetic-field induced circular birefringence - Faraday effect - In noble gases and dihalogens
2005 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 122, no 7, 074321Article in journal (Refereed) Published
Abstract [en]

The effects of relativity on the magnetic-field induced circular birefringence, or Faraday effect, in He, Ne, Ar, Xe, Rn, F 2, Cl 2, Br 2, and I 2 have been determined at the four-component Hartree-Fock level of theory. A measure of the birefringence is given by the Verdet constant, which is a third-order molecular property and thus relates to quadratic response functions. A fully analytical nonlinear polarization propagator approach is employed. The results are gauge invariant as a consequence of the spatial symmetries in the molecular systems. The calculations include electronic as well as vibrational contributions to the property. Comparison with experiment is made for He, Ne, Ar, Xe, and Cl 2, and, apart from neon, the theoretical values of the Verdet constant are within 10% of the experimental ones. The inclusion of nonrelativistically spin-forbidden excitations in the propagator parametrization has significant effects on the dispersion in general, but such effects are in the general case largely explained by the use of a resonant-divergent propagator theory. In the present work we do, however, observe noticeable relativistic corrections to the Verdet constant in the off-resonant regions for systems with light elements (F 2 and Cl 2), and nonrelativistic results for the Verdet constant of Br 2 are in error by 25% in the low-frequency region.

Place, publisher, year, edition, pages
2005. Vol. 122, no 7, 074321
Keyword [en]
Faraday effects, Hartree-Fock calculations, Light elements, Verdet constant, Birefringence, Error analysis, Magnetic fields, Molecular dynamics, Molecular vibrations, Polarization, Inert gases
National Category
Theoretical Chemistry
URN: urn:nbn:se:kth:diva-198791DOI: 10.1063/1.1849167ScopusID: 2-s2.0-22944442226OAI: diva2:1058932

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Available from: 2016-12-21 Created: 2016-12-21 Last updated: 2016-12-21

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