TY - JOUR
T1 - Valence-band photoemission study of β-ZrNCl and the quasi-two-dimensional superconductor NaxZrNCl
AU - Yokoya, T.
AU - Takeuchi, T.
AU - Tsuda, S.
AU - Kiss, T.
AU - Higuchi, T.
AU - Shin, S.
AU - Iizawa, K.
AU - Shamoto, S.
AU - Kajitani, T.
AU - Takahashi, T.
N1 - Funding Information:
We thank Drs. I. Hase and A. Chainani for their valuable discussion. This study was partially supported by by Grants-in-Aid for Young Scientists (A) (No. 14702010) from the Japan Society for the Promotion of Science.
PY - 2004/11
Y1 - 2004/11
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.70.193103
DO - 10.1103/PhysRevB.70.193103
M3 - Article
AN - SCOPUS:19944432911
SN - 0163-1829
VL - 70
SP - 1
EP - 4
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 19
M1 - 193103
ER -