Spin-orbit coupling and the Jahn-Teller effect: vibronic and spin-vibronic angular momenta
نویسنده
چکیده
The concept of symmetry and its breaking holds a special and important place in the physical sciences. One of the best known examples of such symmetry breaking is the Jahn-Teller effect. In their original paper, Jahn and Teller demonstrated(Jahn & Teller 1937) that a symmetry-dictated electronic degeneracy will always be raised by a non-totally symmetric distortion linear in nuclear coordinates(Bunker & Jensen 1998). If the Jahn-Teller distortion is large it will result in a wavefunction localized around the minimum (minima) of the resulting potential energy surface (PES), which occurs (occur) at other than the symmetrical nucelar configuration. In this case, frequently referred to as the static Jahn-Teller effect, the vibronic and spin-vibronic eigenvalues and eigenfunctions can be calculated much as for any other asymmetric molecule. A rather more interesting case and the one we consider herein occurs when the Jahn-Teller distortion is not large enough to localize the molecule about a single minimum on the PES for the duration of the
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