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Graph theory and the Jahn-Teller theoremCeulemans, Arnout ...Jahn-Tellerjev izrek napoveduje spontano razbijanje simetrije in dvig degeneriranih elektronskih stanj nelinearnih molekularnih sistemov. V takih primerih se to zgodi zaradi geometrijskega popačenja. ... Molekularni problemi so pogosto modelirani s spektralno teorijo za obtežene grafe. Pričujoči prispevek obrne proces v nasprotno smer in na novo formulira Jahn-Tellerjev izrek za splošne utežene grafe. Če razumemo lastne vektorje kot orbitale, lastne vrednosti pa kot energijske nivoje, ki naj bi jih zasedli elektroni, tedaj je mogoče degeneracijo stanj razrešiti z ne popolnoma simetrično porazdelitvijo uteži na povezavah in, če je potrebno tudi na vozliščih grafa. V tej zvezi je postavljena tudi zanimiva domneva. Posebej sta obravnavana dva primera (graf oktaedra in graf fenalenila) saj se pri njiju degeniranost pojavlja zaradi različnih razlogov.Source: Proceedings of the royal society A. Mathematical, physical and engineering sciences. - ISSN 1364-5021 (Vol. 468, no. 2140, 2012, str. 971-989)Type of material - article, component partPublish date - 2012Language - englishCOBISS.SI-ID - 16090457
Author
Ceulemans, Arnout |
Lijnen, E. |
Fowler, Patrick W. |
Mallion, Roger B. |
Pisanski, Tomaž
Topics
kemijska teorija grafov |
Jahn-Tellerjev efekt |
spektralna teorija grafov |
Hückelova teorija |
teorija grup |
chemical graph theory |
Jahn-Teller effect |
spectral graph theory |
electronic/spectral degeneracy |
Hückel theory |
group theory
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Database name | Field | Year |
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Ceulemans, Arnout | |
Lijnen, E. | |
Fowler, Patrick W. | |
Mallion, Roger B. | |
Pisanski, Tomaž | 01941 |
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