High-resolution photoemission study of NaV 2O 4

Tian Qian, Kosuke Nakayama, Yujie Sun, Toshiyuki Arakane, Takafumi Sato, Takashi Takahashi, Kazunari Yamaura, Eiji Takayama-Muromachi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number024709
Journaljournal of the physical society of japan
Volume78
Issue number2
DOIs
Publication statusPublished - 2009 Feb

Keywords

  • Half-metal
  • High-resolution photoemission spectroscopy
  • NaV O
  • Non-Fermi-liquid
  • Quasi-one-dimensional materials
  • Tomonoga-Luttinger liquid
  • Vanadium oxides

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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