Fluorescence carbon Kα x-ray emission spectra (XES) of low-dimensional charge transfer salts [(TMTSF)2PF6, (BETS)2FeBr4, and (CPDT-STE) (TCNQ)] are presented. The Fermi energy positions are determined for these spectra using XPS binding energies of the C 1s core level. The absence of metallic Fermi edges in the carbon Kα XES data is reminiscent of Luttinger-liquid behavior predicted for one-dimensional metals, but the observed suppression of spectral weight near the Fermi level occurs on a surprisingly large energy scale. An additional low-energy subband found in carbon Kα XES of (BEDT-TTF)4[(H3O)Fe (C2O4)3] C5H5N is attributed to strong cation-anion interaction in this organic super-conductor.
|Number of pages||4|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2001 Dec 15|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics