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Quadratic Jahn‐Teller Effect and Tunneling Splitting in Octahedral Clusters
Author(s) -
Bacci M.
Publication year - 1977
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220820117
Subject(s) - anharmonicity , jahn–teller effect , quantum tunnelling , quadratic equation , octahedron , condensed matter physics , maxima and minima , symmetry (geometry) , phonon , physics , line (geometry) , quantum mechanics , mathematics , ion , geometry , mathematical analysis
The tunneling splitting due to transitions between coexisting minima of different symmetry is considered and approximate expressions for this splitting are given. The contemporary presence of quadratic Jahn‐Teller terms and anharmonic restoring forces is also discussed. The results are a.pplied to the rase of MgO:V 2+ and an hypothesis for the origin of the strirctrrre of the no‐phonon line ( 4 A 2g → 4 T 2g ) in the absorption spectrum is proposed.