Publication
Physical Review B
Paper

Metal-nonmetal transition in tungsten bronzes: A photoemission study

View publication

Abstract

NaxWO3 and NaxTayW1-yO3 bronzes are studied near the metal-nonmetal transition (MN) using core-level and valence-band photoelectron spectroscopy with synchrotron radiation. It is shown that in the semiconducting composition an impurity band with a width constant with x-y develops in the matrix p-d gap and that the density of states at the Fermi level is finite for compositions on both sides of the MN transition. These results show that the MN transition is due to localization in an impurity band in a pseudogap. This impurity band merges with the matrix conduction band when x-y increases. © 1985 The American Physical Society.

Date

15 Aug 1985

Publication

Physical Review B

Authors

Topics

Share