Abstract
Transition metal chalcogenides with a low-dimensional structure may be in a Charge-Density-Wave (CDW) state at low temperatures. The electron-density in the conduction or valence band is modulated according to the values of a wave function, as characterized by a wave vector (q) and by an amplitude. The CDW-state is a state of lower energy than the state with translation symmetry, if for a finite fraction of the Fermi surface the modulation wave vector is equal to two times the Fermi wave vector, and if the atom cores exhibit a displacive modulation with the same wave vector [1]. This periodic displacement leads to additional reflections in the diffraction patterns (the so-called satellite reflections). Measurement of their intensities allows the determination of the displacements of all atoms. The subject of the present paper is the characterisation of the CDW-state through the description of the modulated structure.
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© 1996 Plenum Press, New York
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van Smaalen, S. (1996). Incommensurately Modulated Structures of Inorganic Charge-Density-Wave Compounds. In: Schlenker, C., Dumas, J., Greenblatt, M., van Smaalen, S. (eds) Physics and Chemistry of Low-Dimensional Inorganic Conductors. NATO ASI Series, vol 354. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-1149-2_12
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DOI: https://doi.org/10.1007/978-1-4613-1149-2_12
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