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https://doi.org/10.1088/0957-4484/17/4/042
Title: | Size effect on the electron-phonon coupling in CuO nanocrystals | Authors: | Fan, H. Zou, B. Liu, Y. Xie, S. |
Issue Date: | 28-Feb-2006 | Citation: | Fan, H., Zou, B., Liu, Y., Xie, S. (2006-02-28). Size effect on the electron-phonon coupling in CuO nanocrystals. Nanotechnology 17 (4) : 1099-1103. ScholarBank@NUS Repository. https://doi.org/10.1088/0957-4484/17/4/042 | Abstract: | CuO is the prototype compound of cuprate superconductors, so understanding its electronic structures will facilitate the study of the pairing mechanism and miscellaneous states of high-temperature superconductors. We prepared uniform CuO nanocrystals (7-100 nm) and studied their size-dependent Raman scattering spectra. The relative variation between the two-phonon scattering band (2B g) and the one-phonon band (Bg) indicates a decreasing electron-phonon coupling with reducing size, which unveils the dominant Fröhlich electron-phonon coupling, as indicated by Devreese, but not the small polaron in CuO. Moreover, the anomalous enhancement of the multi-phonon band at a critical size and 1D structure at room temperature is attributable to an enhanced electron-phonon coupling accompanied by phonon-plasmon coupling, i.e., the 'plasphon' proposed by Alexandrov et al in 1981. © 2006 IOP Publishing Ltd. | Source Title: | Nanotechnology | URI: | http://scholarbank.nus.edu.sg/handle/10635/97945 | ISSN: | 09574484 | DOI: | 10.1088/0957-4484/17/4/042 |
Appears in Collections: | Staff Publications |
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