Pressure-induced changes in the optical properties of quasi-one-dimensional $β$-Na$_{0.33}$V$_2$O$_5$

Details Pressure-induced changes in the optical properties of quasi-one-dimensional $β$-Na$_{0.33}$V$_2$O$_5$ Pressure-induced changes in the optical properties of quasi-one-dimensional $β$-Na$_{0.33}$V$_2$O$_5$

2007-05-25

arxiv.org/abs/0705.3807v1

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 5 figures

Scientific paper

10.1103/PhysRevB.76.075128

The pressure-induced changes in the optical properties of $\beta$-Na$_{0.33}$V$_2$O$_5$ single crystals at room temperature were studied by polarization-dependent Raman and far-infrared reflectivity measurements under high pressure. From the changes in the Raman- and infrared-active phonon modes in the pressure range 9 - 12 GPa a transfer of charge between the different V sites can be inferred. The importance of electron-phonon coupling in the low-pressure regime is discussed.

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