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Teller, E.
Lawrence Livermore National Lab., CA (USA)1981
Lawrence Livermore National Lab., CA (USA)1981
AbstractAbstract
[en] The interactions between Teller, Renner, Jahn and Landau which led to the formulation of the Jahn-Teller effect are discussed. The applicability of Jahn-Teller type of theory to superconductivity and the explanation proposed by the use of Goldstone particles are assessed
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31 Aug 1981; 14 p; 10. Internationl colloquium on group theoretical methods in physics; Canterbury (UK); 31 Aug - 4 Sep 1981; CONF-810898--2; Available from NTIS., PC A02/MF A01 as DE82013831
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AbstractAbstract
No abstract available
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International conference on the applications of the Moessbauer effect; Bendor, France; 02 Sep 1974
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J. Phys. (Paris), Colloq; (no.6); p. 121-130
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Ranfagni, A.; Pazzi, G.P.; Fabeni, P.; Mugnai, D., E-mail: d.mugnai@ifac.cnr.it2016
AbstractAbstract
[en] Within a revival of interest in the emission properties of Tl+-like impurity centers in alkali-halide crystals, the problem of a complete interpretation of high-energy and low-energy emissions in the A-band of KCl:Tl remains without a satisfactory explanation. Two previous works reported experimental results relative to spectral and decay-time measurements for low-energy (weak) emission at 475 nm, and for high-energy emission at 300 nm. In the latter case, however, a confirmation of the existence of an anomalous type of behavior in the slow decay time needed to be clarified. The results reported here demonstrate that this anomaly is not present in high-energy emission. On the basis of these more recent experimental results, an attempt is made to obtain a unifying model, one always based on the Jahn–Teller effect, which could serve in interpreting both high- and low-energy emissions.
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S0022-2313(15)30582-2; Available from http://dx.doi.org/10.1016/j.jlumin.2016.02.026; Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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AbstractAbstract
[en] Published in summary form only
Source
1. Brazilian School on Semiconductor Physics; Campinas, SP (Brazil); 31 Jan - 11 Feb 1983
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[en] In this work, we derive expansion formulas up to arbitrary order in vibrational coordinates for the tetrahedral and octahedral vibronic Hamiltonians that involve A-type states and a-type vibrations. The root-branch approach and modularized approach enable us to derive vibronic Hamiltonians including up to two vibrational modes for 5 problems in T symmetry and 92 problems in symmetry within one paper. These formulas can be easily adapted to problems of , and symmetries. Finishing this work, we have derived general vibronic Hamiltonians for all unimodal and bimodal Jahn-Teller and pseudo-Jahn-Teller problems of cubic group systems. These bimodal formulas can be extended to cover problems that involve more than two modes.
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Source
S0301010418300909; Available from http://dx.doi.org/10.1016/j.chemphys.2018.08.028; Copyright (c) 2018 Elsevier B.V. All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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[en] Instead of the Cooper pair of BCS theory, the authors incorporate the chemical structural effects of pairwise movement by using geminals (two-electron wavefunctions), rather than the simple orbital (one-electron wavefunction) model. Instead of the nearest-neighbor antisymmetric-type vibronic interaction of Bipolaron Theory, the authors emphasize the distant neighbor's opposing vibrations in doped systems. Besides the Jahn-Teller effect of second-order energy, the authors propose Renner-Teller effect for crystals other than linear molecules, and obtain first-order energy of degenerate vibronic geminal states by using the Herzberg-Teller expansions of vibronic states of the Hamiltonian
Source
Anon; 371 p; 1995; p. 358b; Ohio State University; Columbus, OH (United States); 50. symposium on molecular spectroscopy; Columbus, OH (United States); 12-16 Jun 1995
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Book
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Dolgolenko, A.P.; Martsenyuk, L.S.
Interaction of radiation with solids. Proceedings of the 10th international conference2013
Interaction of radiation with solids. Proceedings of the 10th international conference2013
AbstractAbstract
[en] Some characteristics of silicon divacancy as a radiation bistable defect, subject to effect of Jahn-Teller are analysed. As follows from literary sources, the adiabatic potential of silicon divacancy has two minimums, divided by high enough potential barrier that provides stability of this defect at room temperature. The presence of the strong vibronic link means that energy of Jahn-Teller stabilization is much more than energy of zero vibrations, therefore in minimums of adiabatic energy there are local vibration states. If the potential barrier appears transparent enough, there is a splitting level on which there is an vibration quantum and system can make the pulsing oscillation caused by tunnel transitions between configurations of minimums of adiabatic potential. The various percentage ratio of divacancy, having the basic minimum in one of two possible configurations is experimentally observed, for p-Si and n-Si. We, on the basis of the analysis conducted in work, offer the following interpretation of observable dependence: the states of divacancy are not independent, and are in superposition, define the equation resulted in work, describing probability of finding of the system in each of the states. In accordance with such interpretation, it means that all divacancy in this material are identical in relation to configurations of minimums, but thus minimums are not equivalent. It is shown also, that depending on external influence, properties of material, concentration of the entered defects and a kind of an irradiation can purposefully influence on the parameters of divacancy, which specifies on possibility of application of silicon with such centers for creation of devices of the quantum informative systems. (authors)
Original Title
O vozmozhnom sushchestvovanii interferentsionnykh perekhodov mezhdu sostoyaniyami radiatsionnykh defektov kremniya
Source
Anishchik, V.M.; Uglov, V.V.; Baran, L.V.; Azarko, I.I. (Belarusian state univ., Minsk (Belarus)); Belarusian state univ., Minsk (Belarus); Ministry of education of Republic of Belarus, Minsk (Belarus); National academy of sciences of Belarus, Minsk (Belarus); State commitee for science and technologies, Minsk (Belarus); Belarus state found of fundamental researches, Minsk (Belarus); 384 p; ISBN 978-985-553-141-9;
; Sep 2013; p. 103-105; 10. International conference 'Interaction of radiation with solids'; 10. Mezhdunarodnaya konferentsiya 'Vzaimodejstvie izluchenij s tverdym telom'; Minsk (Belarus); 24-27 Sep 2013; 9 refs., 1 tabs.

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[en] Within the framework of the pair potential approximation and the shell model including the Jahn-Teller contribution to the crystal energy we have studied the elastic properties of La2CuO4. The strong anisotropic correlation between the lattice deformations exx and ezz and the internal displacements of the accompanying sublattices within the La2O2 layers are shown to be responsible for the giant anisotropy of the elastic moduli in the xz-plane. We have predicted the softening of several elastic moduli in the orthorhombic phase region near the pressure-induced structural phase transition. But we have not observed the softening of c11, c12, and c66 in the tetragonal phase region that was measured near the temperature-induced structural phase transition. (author)
Source
Country of input: International Atomic Energy Agency (IAEA); Refs; This record replaces 31045988
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Journal Article
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Journal of Physics. Condensed Matter (Online); ISSN 1361-648X;
; v. 12(7); p. 1199-1207

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[en] Polymicrocrystals of ferric borate were studied by NGR as a function of temperature up to the point where they react with the carbon packing material to form an iron carbide. The variation of the line width shows a sudden decrease at 551K which is interpreted as arising from a coherent tunnel effect between two Jahn-Teller distortions
Source
International conference on the applications of the Moessbauer effect; Corfu, Greece; 13 - 17 Sep 1976
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J. Phys. (Paris), Colloq; (no.6); p. C6.589-C6.590
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AbstractAbstract
No abstract available
Original Title
Distorcoes induzidas pela presenca da vacancia e nitrogenio em diamante
Source
37. Annual Meeting of the Brazilian Society for the Advancement of Science; Belo Horizonte, MG (Brazil); 10-17 Jul 1985; Published in summary form only.
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