The photoelectron spectrum of sulphur trioxide: Jahn-Teller distortion in SO + 3

1974 ◽  
Vol 336 (1606) ◽  
pp. 355-364 ◽  
Keyword(s):  
Experimental Data ◽  
Ground State ◽  
Photoelectron Spectrum ◽  
Electronic States ◽  
Teller Distortion ◽  
Definite Evidence ◽  
Spin Resonance ◽  
Jahn Teller ◽  
Sulphur Trioxide ◽  
Jahn Teller Distortion

The photoelectron spectrum of sulphur trioxide has been recorded and extensive fine structure resolved. In three bands of the spectrum there is evidence for Jahn-Teller distortion. This has been interpreted quantitatively using the model of Longuet-Higgins, Opik, Pryce & Sack (1958). It also provides definite evidence that the three bands correspond to degenerate electronic states of SO + 3 . Four ionization potentials were found with values 12.8, 13.8, 14.9 and 17.9 eV. In two cases approximate changes in the S—O bond length have been calculated from the experimental data. The order of the first three electronic states of SO + 3 is unexpected, the ground state being degenerate. This result is compared with other data from photoelectron, ultraviolet and electron spin resonance spectra of isoelectronic species.

OBSERVATION OF THE ESR FOR HIGH-Tc SUPERCONDUCTORS Bi-Sr-Ca-Cu-O

1989 ◽  
Vol 03 (04) ◽  
pp. 355-359 ◽  
Author(s):  
S.L. YUAN ◽  
B.H. HOU ◽  
S.Z. JIN ◽  
W. WANG ◽  
G.G. ZHENG ◽  
...  
Keyword(s):  
Superconducting Transition ◽  
Teller Distortion ◽  
High Tc ◽  
Spin Resonance ◽  
Jahn Teller ◽  
Zero Resistance ◽  
Magnetic Ions ◽  
Preliminary Study ◽  
Perpendicular Component ◽  
Jahn Teller Distortion

The preliminary study on the electron spin resonance (ESR) for the Bi-Sr-Ca-Cu-O system with different superconducting transition temperatures has been made at room temperature. It is found that the Lande factor g-values are increased with increasing zero resistance temperature T c0 but width between peaks ΔH pp of the ESR spectrum decreased with increasing T c0 . These might be attributed to the spin-orbit coupling of the magnetic ions and the Jahn-Teller distortion in the perpendicular component.

ChemInform Abstract: A Nonempirical Approach to Ground-State Jahn-Teller Distortion: Case Study of VCl4.

ChemInform ◽  
2010 ◽  
Vol 28 (46) ◽  
pp. no-no
Author(s):  
R. BRUYNDONCKX ◽  
C. DAUL ◽  
P. T. MANOHARAN ◽  
E. DEISS
Keyword(s):  
Ground State ◽  
Teller Distortion ◽  
Jahn Teller ◽  
Jahn Teller Distortion

scholarly journals Magnetic structures and anisotropic excitations in Tb2Ti2O7spin liquid

2014 ◽  
Vol 70 (a1) ◽  
pp. C1543-C1543
Author(s):  
Isabelle Mirebeau ◽  
Sylvain Petit ◽  
Julien Robert ◽  
Solene Guitteny ◽  
Arsen Gukasov ◽  
...  
Keyword(s):  
Crystal Field ◽  
Ground State ◽  
Mean Field ◽  
Spin Liquid ◽  
Singlet Ground State ◽  
Field Calculation ◽  
Teller Distortion ◽  
Classical Spin ◽  
Jahn Teller ◽  
Jahn Teller Distortion

Geometrical frustration in the pyrochlore lattice of corner sharing tetrahedra yields exotic short range ordered ground states known as spin liquids or spin ices. Among them, Tb2Ti2O7 spin liquid (also called quantum spin ice) remains the most mysterious, in spite of 15 years of intense investigation. Our recent single crystal experiments using neutron diffraction and inelastic scattering down to 50 mK yield new insight on this question. By applying a high magnetic field along a [111] anisotropy axis [1], the Tb moments reorient gradually without showing the magnetization plateau observed in classical spin ices. Quantitative comparison with mean field calculation supports a dynamical symmetry breaking akin to a dynamic Jahn-Teller distortion, preserving the overall cubic symmetry. In the non-Kramers Tb ion this induce a quantum mixing of the wave-functions of the ground state crystal field doublet enabling the formation of a spin liquid, viewed as a non-magnetic two-singlet ground state in this mean-field picture [2]. The spin lattice coupling also shows up in the spin fluctuations in zero field [3]. Dispersive excitations emerge from pinch-points in the reciprocal space, with anisotropic spectral weight. This is the first evidence of them in a disordered ground state. They reveal the breaking of some conservation law ruling the relative orientations of the fluctuating magnetic moments in a given tetrahedron, as for the monopole excitations in classical spin ices. The algebraic character of the correlations shows that Tb2Ti2O7 ground state is akin to a Coulomb phase. Finally, the first excited crystal field level and an acoustic phonon mode interact, repelling each other. The whole results show that the magnetoelastic coupling is a key feature to understand the surprising spin liquid ground state. They call for an interaction between quadrupolar moments, whose Jahn-Teller distortion is the first (single site) approximation.

Electronic structure and the dynamic Jahn–Teller effect on R′ centers in alkali halides

1970 ◽  
Vol 48 (14) ◽  
pp. 1694-1707 ◽  
Author(s):  
M. Inoue ◽  
R. Sati ◽  
S. Wang
Keyword(s):  
Excited State ◽  
Ground State ◽  
Optical Transition ◽  
Alkali Halides ◽  
Teller Distortion ◽  
Common Features ◽  
First Excited State ◽  
Jahn Teller ◽  
Jahn Teller Effect ◽  
Jahn Teller Distortion

The low-lying states of R′ centers in LiF, KCl, and KBr have been calculated using the quasicontinuum model of F aggregate centers. It turns out that the ground state of the R′ center is of 3A2 symmetry rather than 1A1 or 1E symmetry, and that the first excited state of the R′ center to which the optical transition occurs from its ground state is an orbitally doubly degenerate state (3E). The absorption line shape for the transition 3A2 → 3E of the R′ center has also been discussed for these crystals. The reasons for the presence of common features in the R′ bands in LiF, KCl, and KBr are pointed out. A comparison of the calculated results with the experimental results shows that the R′ band is due to the transition from the ground state of the R′ center (F3− center) to its first excited state perturbed by the dynamic Jahn–Teller distortion.

High-Temperature Reorientation Of Distortions In The Excited State Of The VGaTeAs Complexes In n-Type GaAs

1996 ◽  
Vol 442 ◽  
Author(s):  
A. A. Gutkin ◽  
M. A. Reshchikov ◽  
V. E. Sedov
Keyword(s):  
Experimental Data ◽  
Excited State ◽  
Excited States ◽  
Thermal Emission ◽  
Polarized Light ◽  
Dipole Approximation ◽  
Model Parameters ◽  
Teller Distortion ◽  
Jahn Teller ◽  
Jahn Teller Distortion

AbstractWe have investigated polarization of photoluminescence from the VGaTeAs complexes in n-GaAs induced through resonant excitation by polarized light. Experimental data in temperature range from 77 to 240 K were described by classic one-dipole approximation within the model of the VGaTeAs complex subjected to the Jahn-Teller distortion in the ground and excited states. It is shown that depolarization of photoluminescence at temperatures over ∼ 120 K may be explained by concurrent action of i) thermal emission and back capture of holes bound to the complexes in the excited state and ii) reorientation of complex distortion during a life of this state. The model parameters have been estimated.

A Nonempirical Approach to Ground-State Jahn−Teller Distortion:  Case Study of VCl4†

1997 ◽  
Vol 36 (19) ◽  
pp. 4251-4256 ◽  
Author(s):  
Raf Bruyndonckx ◽  
Claude Daul ◽  
P. T. Manoharan ◽  
Eric Deiss
Keyword(s):  
Ground State ◽  
Teller Distortion ◽  
Jahn Teller ◽  
Jahn Teller Distortion
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