Quadratic coupling treatment of the Jahn-Teller effect in the triply-degenerate electronic state of CH4+: Can one account for floppiness?

2012 ◽  
Vol 137 (21) ◽  
pp. 214320 ◽  
Author(s):  
T. Mondal ◽  
A. J. C. Varandas
Keyword(s):  
Electronic State ◽  
Teller Effect ◽  
Jahn Teller ◽  
Jahn Teller Effect ◽  
Quadratic Coupling ◽  
Coupling Treatment

Studies of the Jahn-Teller effect .II. The dynamical problem

1958 ◽  
Vol 244 (1236) ◽  
pp. 1-16 ◽  
Keyword(s):  
Electronic State ◽  
Quantum Number ◽  
Vibrational Energy ◽  
Dynamical Problem ◽  
Oscillator Strengths ◽  
Teller Effect ◽  
Linear Molecule ◽  
Electronic Band ◽  
Jahn Teller ◽  
Jahn Teller Effect

This paper examines the vibronic energy levels of a symmetrical non-linear molecule in a spatially doubly degenerate electronic state which is split in first order by a doubly degenerate vibrational mode. The vibronic levels are classified by a quantum number, which in certain cases is formally related to the combined angular momentum of electronic and vibrational motion, and numerical values are obtained for the energies of these levels as functions of this quantum number and a dimensionless parameter measuring the magnitude of the electronic-vibrational coupling. It is shown that the selection rules for transitions from these vibronic levels to those of a non-degenerate electronic state allow changes in vibrational energy of any integral number of quanta, as though the Jahn-Teller effect were equivalent to a distortion which makes allowed vibrational transitions which would otherwise be forbidden. Numerical values are given for the oscillator strengths of vibronic absorption or emission bands involving transitions between a Jahn-Teller distorted state and an electronically non-degenerate state. It is found that in transitions from the latter to the former the vibrational structure of the electronic band exhibits two intensity maxima if the distortion is large.

EPR of Cu2+-doped Cs2CO3and CsHCO3: evidence of the Jahn–Teller effect

2009 ◽  
Vol 164 (2) ◽  
pp. 132-137
Author(s):  
Fevzi Köksal ◽  
Dilek Demir ◽  
Rahmi Köseoğlu
Keyword(s):  
Teller Effect ◽  
Jahn Teller ◽  
Jahn Teller Effect

Jahn-Teller effect and EPR of CrO3−4 centres in x-irradiated 3CdSO4 · 8H2O crystals

1994 ◽  
Vol 55 (8) ◽  
pp. 727-735 ◽  
Author(s):  
M. Salagram ◽  
T.S.N. Murthy ◽  
K. Madhukar ◽  
C.S. Sunandana
Keyword(s):  
Teller Effect ◽  
Jahn Teller ◽  
Jahn Teller Effect
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