We report high-resolution photoemission spectroscopy (PES) of quasi one-dimensional (1D) metal NaV 2O 4. We found that the valence band consists of well-separated two main bands; one originates in the V 3d states located around the Fermi level (E F) and the other is due to the O 2p states situated far away from E F in qualitatively good agreement with the band calculation. The PES spectrum near E F shows a power-law behavior characteristic of quasi-1D materials. The anomalous exponent α shows a considerable temperature dependence, in particular around the magnetic transition temperature. The temperature dependence of α is also consistent with the variation of the transport anisotropy with temperature. These results suggest a close relationship between the electronic structure near E F and the magnetic order and/or the dimensional crossover.
- High-resolution photoemission spectroscopy
- NaV O
- Quasi-one-dimensional materials
- Tomonoga-Luttinger liquid
- Vanadium oxides
ASJC Scopus subject areas
- Physics and Astronomy(all)