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Charge and Bonding in CuGeO Nanorods. | LitMetric

Charge and Bonding in CuGeO Nanorods.

Nano Lett

Department of Chemistry , University of Tennessee, Knoxville , Tennessee 37996 , United States.

Published: June 2018

We combine infrared and Raman spectroscopies to investigate finite length scale effects in CuGeO nanorods. The infrared-active phonons display remarkably strong size dependence whereas the Raman-active features are, by comparison, nearly rigid. A splitting analysis of the Davydov pairs reveals complex changes in chemical bonding with rod length and temperature. Near the spin-Peierls transition, stronger intralayer bonding in the smallest rods indicates a more rigid lattice which helps to suppress the spin-Peierls transition. Taken together, these findings advance the understanding of size effects and collective phase transitions in low-dimensional oxides.

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Source
http://dx.doi.org/10.1021/acs.nanolett.8b00407DOI Listing

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