"Charge and Bonding in CuGeO3 Nanorods" by Kenneth Robert O'Neal, Amal al-Wahish et al.
 

Chemistry Publications and Other Works

Source Publication (e.g., journal title)

Nano Letters

Document Type

Article

Publication Date

5-4-2018

DOI

10.1021/acs.nanolett.8b00407

Abstract

We combine infrared and Raman spectroscopies to investigate finite length scale effects in CuGeO3 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.

Submission Type

Post-print

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