Valence-band photoemission study of β-ZrNCl and the quasi-two-dimensional superconductor NaxZrNCl

T. Yokoya, T. Takeuchi, S. Tsuda, T. Kiss, T. Higuchi, S. Shin, K. Iizawa, S. Shamoto, T. Kajitani, T. Takahashi

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Abstract

We have performed photoemission (PE) spectroscopy of β-ZrNCl and NaxZrNCl to study intercalation-induced change in the electronic structure. The valence band PE spectrum of β-ZrNCl shows a small intensity region within ∼2.5 eV of EF with a very small hump at E F that can be ascribed to hydrogen impurity states. These provide spectroscopic evidence that β-ZrNCl is an n-type semiconductor. Upon Na intercalation, new states possibly involving hybridized Zr4d and N2p systematically evolve at EF, with a negligible shift in the valence band structures. Similar results in β-HfNCl and NaxHfNCl indicate that these results represent common electronic features of the layered nitride chloride superconductors.

Original languageEnglish
Article number193103
Pages (from-to)1-4
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number19
DOIs
Publication statusPublished - Nov 1 2004

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Yokoya, T., Takeuchi, T., Tsuda, S., Kiss, T., Higuchi, T., Shin, S., Iizawa, K., Shamoto, S., Kajitani, T., & Takahashi, T. (2004). Valence-band photoemission study of β-ZrNCl and the quasi-two-dimensional superconductor NaxZrNCl. Physical Review B - Condensed Matter and Materials Physics, 70(19), 1-4. [193103]. https://doi.org/10.1103/PhysRevB.70.193103