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Second-order Jahn—Teller effect degeneracy

The essence of the first or second order Jahn-Teller effect is that a high-symmetry geometry generates a real or near degeneracy, which can be broken with stabilization by a symmetry-lowering deformation. Note a... [Pg.93]

One doesn t need a real degeneracy to benefit from this effect. Consider a nondegenerate two-level system, 84, with the two levels of different symmetry (here labeled A, B) in one geometry. If a vibration lowers the symmetry so that these two levels transform as the same irreducible representation, call it C, then they will interact, mix, and repel each other. For two electrons, the system will be stabilized. The technical name of this effect is a second order Jahn-Teller deformation.67... [Pg.93]

See other pages where Second-order Jahn—Teller effect degeneracy is mentioned: [Pg.143]    [Pg.360]    [Pg.233]    [Pg.402]    [Pg.32]    [Pg.298]    [Pg.402]    [Pg.1456]    [Pg.157]    [Pg.189]    [Pg.24]    [Pg.128]    [Pg.10]    [Pg.24]    [Pg.179]    [Pg.58]    [Pg.66]    [Pg.314]    [Pg.321]    [Pg.358]   


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Degeneracy

Jahn effect

Jahn second-order

Jahn-Teller

Jahn-Teller degeneracy

Jahn-Teller effect

Jahn-Teller ordering

Second-order effects

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