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The Mechanisms of Jahn–Teller Complex Reorientations

Elsevier Science & Technology
DOI: 10.1016/s0065-3276(03)44031-8


Abstract The process of reorientations of the Jahn–Teller (JT) complex with trigonal site symmetry as well as slightly elongated and compressed ones are studied by X-band and Q-band electron paramagnetic resonance (EPR). The observed phenomena of the resonance line broadening and the dispersion of the resonance signal followed by its coalescence are discussed taking into consideration the increase in the transition rate with a rise in temperature. We conclude that even for a complex located at low symmetry sites the transitions between JT conformations can have a tunneling character.

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