Angle-resolved photoemission spectroscopy of the insulating NaxWO3: Anderson localization, polaron formation, and remnant fermi surface

S. Raj, D. Hashimoto, H. Matsui, S. Souma, T. Sato, T. Takahashi, D. D. Sarma, Priya Mahadevan, S. Oishi

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28 Citations (Scopus)

Abstract

The electronic structure of the insulating sodium tungsten bronze, Na0.025WO3, is investigated by high-resolution angle-resolved photoemission spectroscopy. We find that near-EF states are localized due to the strong disorder arising from random distribution of Na+ ions in the WO3 lattice, which makes the system insulating. The temperature dependence of photoemission spectra provides direct evidence for polaron formation. The remnant Fermi surface of the insulator is found to be the replica of the real Fermi surface in the metallic system.

Original languageEnglish
Article number147603
JournalPhysical Review Letters
Volume96
Issue number14
DOIs
Publication statusPublished - 2006 Apr 21

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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