We study the electronic resonant states of H3 with energies above potential energy surface H3+ ground state. These are important for dissociative recombination at higher collision energies, and previous studies have indicated that these exhibit a triple intersection. introduce complex generalization pseudo-Jahn-Teller model to describe states. The autoionization widths computed electron scatter...

The recent cavity ringdown (CRD) measurement of the forbidden à 2E ← X̃ A2 transition of the nitrate radical NO3 reveals a rich, well-resolved spectrum in the near-infrared. The spectroscopic detail provides a new window onto the Jahn–Teller (JT) and pseudo-Jahn–Teller (PJT) effects in NO3. This paper reviews the current experimental evidence for vibronic coupling in the à state and discusses th...

The ground state of acceptors in cubic semiconductors is fourfold degenerate (I?,) and the interaction with the lattice vibrations leads to the possibility of a Jahn-Teller effect [l]. The extended nature of the wave function of these defects [ 2 ] has two important consequences : (i) the interaction is mainly with long-wavelength acoustic phonons, (ii) because of the large elastic energy assoc...

Much recent progress has been made theoretically and computationally towards understanding the importance of conical intersections for chemical reactions. Nonetheless, experimental characterization of conical intersections has proven extremely difficult with one striking exception: the Jahn-Teller conical intersection. This article overviews the fundamental similarity of a variety of conical in...

We present a density functional theory (DFT) calculation in the generalized gradient approximation to study the possibility for the existence of Jahn-Teller (JT) or pseudo Jahn-Teller (PJT) type local distortions in the La-Ba-Cu-O superconducting system. We performed the calculation and correspondingly group theory classification of the electronic ground state of the CuO6 elongated octahedra cl...

The Jahn-Teller effect in the first two excited states of the nitrate radical NO3 has yet to be experimentally elucidated. In this paper, direct evidence of strong Jahn-Teller interactions in the A state is presented from the first complete absorption spectrum of the A2E'' <-- X2A(2)' transition of NO3 in the gas phase in the region 5900-9000 cm(-1), at moderate resolution (0.15 cm(-1)). The ob...