Changes of electronic structure across the insulator-to-metal transition of quasi-two-dimensional Na-intercalated β-HfNCl studied by photoemission and x-ray absorption

T. Yokoya, Y. Ishiwata, S. Shin, S. Shamoto, K. Iizawa, T. Kajitani, I. Hase, T. Takahashi

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29 Citations (Scopus)

Abstract

We use photoemission (PE) and x-ray absorption (XA) spectroscopy to study intercalation-induced changes in the electronic structure of β-HfNCl and (formula presented) PE shows appearance of new states in (formula presented) within the gap of β-HfNCl, with negligible changes in the energy positions of valence-band features of the parent, suggesting a non-rigid-band behavior. N (formula presented) XA results show that the tail of the conduction band, with a quasi-two-dimensional character, extends to lower energy in (formula presented) than in β-HfNCl. The study provides information on the electronic structure and its change across the insulator-to-metal transition of the new class of superconductors.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume64
Issue number15
DOIs
Publication statusPublished - Jan 1 2001
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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