On excitonic wave—phonon coupling and structural transitions |
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| Authors: | H. Capellmann |
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| Affiliation: | (1) Present address: Institut für Theoretische Physik, Technischen Hochschule Aachen, Templergraben 64, D-5100 Aachen, Federal Republic of Germany;(2) Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania, USA |
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| Abstract: | A strong coupling theory involving excitonic instabilities and lattice distortions is developed. It is argued that this driving mechanism applies to structural transitions in a number of transition metal oxides and to the superstructures of semiconductor surfaces and layered transition metal compounds. |
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