Intermediate Jahn-Teller effect within an orbital triplet - I — Theoretical analysis of the paramagnetic resonanceReport as inadecuate




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Abstract : We analyze in detail how the spectroscopic properties of an orbital triplet in octahedral symmetry vary because of the Jahn-Teller coupling. Up to now, only static and dynamic cases were distinguished. We show, in the case of a 3T1 triplet coupled to Eg modes of vibration that an intermediate situation does exist between these well known cases, and that this intermediate situation leads to paramagnetic resonance spectra very different from those obtained in the static and dynamic cases. We show also that a high magnetic field could stabilize the system and that situations exist for which resonance spectra have an apparent orthorhombic symmetry.

Mots-clés : Jahn Teller effect lattice phonons paramagnetic resonance triplet state





Author: A. Nahmani R. Buisson R. Romestain

Source: https://hal.archives-ouvertes.fr/



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