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

doi:10.1143/JPSJ.78.024709

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 journal › Article › peer-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 language	English
Article number	024709
Journal	journal of the physical society of japan
Volume	78
Issue number	2
DOIs	https://doi.org/10.1143/JPSJ.78.024709
Publication status	Published - 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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title = "High-resolution photoemission study of NaV 2O 4 ",

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.",

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

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

year = "2009",

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language = "English",

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T1 - High-resolution photoemission study of NaV 2O 4

AU - Qian, Tian

AU - Nakayama, Kosuke

AU - Sun, Yujie

AU - Arakane, Toshiyuki

AU - Sato, Takafumi

AU - Takahashi, Takashi

AU - Yamaura, Kazunari

AU - Takayama-Muromachi, Eiji

PY - 2009/2

Y1 - 2009/2

N2 - 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.

AB - 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.

KW - Half-metal

KW - High-resolution photoemission spectroscopy

KW - NaV O

KW - Non-Fermi-liquid

KW - Quasi-one-dimensional materials

KW - Tomonoga-Luttinger liquid

KW - Vanadium oxides

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