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Raman, infrared and optical spectra of the spin-Peierls compound NaV_2O_5 | | S. A. Golubchik
; M. Isobe
; A. N. Ivlev
; B. N. Mavrin
; M. N. Popova
; A. B. Sushkov
; Yu. Ueda
; A. N. Vasil’ev
; | | Date: |
6 Nov 1997 | | Journal: | Tech. Report ISSP, Ser. A, No. 3284 (1997); J. Phys. Soc. Japan 66(12), 4042-4046, (1997). | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | We have measured polarized spectra of Raman scattering, infrared and optical transmission of NaV_2O_5 single crystals above the temperature of the spin-Peierls transition Tsp=35 K. Some of the far-infrared (FIR) phonon lines are strongly asymmetric, due to the spin-phonon interaction. In addition to the phonon lines, a broad band was observed in the c(aa)c Raman spectrum and in the E||a FIR transmission spectrum. A possible origin of these bands is discussed. The absorption band at 10000 cm-1 1.25 eV is attributed to vanadium d-d electronic transitions while the absorption edge above 3 eV is supposed to correspond to the onset of charge-transfer transitions. | | Source: | arXiv, cond-mat/9711048 | | Services: | Forum | Review | PDF | Favorites | |
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