Abstract
We measured the optical response of ${\mathrm{CuGeO}}_{3}$ nanorods in order to reveal size effects on the electronic properties. The vibronically activated $d$-to-$d$ color band excitations are activated by the 131 and 478 ${\mathrm{cm}}^{\ensuremath{-}1}$ phonons, with the relative contribution of the lower frequency O-Cu-O bending mode increasing with decreasing size until it dominates the process. We also uncover trends in the direct band gap, with the charge transfer edge hardening with decreasing size. These findings advance the understanding of size effects in low-dimensional copper oxides.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.