Cu 2p-1s x-ray emission spectroscopy of mineral tetrahedrite Cu12Sb4S13. (October 2020)

• Record Type: Journal Article
• Authors: Sato, Hitoshi; Nagasaki, Toshiki; Suekuni, Koichiro; Tanaka, Hiromi I.; Rousuli, Awabaikeli; Nakamura, Shogo; Kawamura, Naomi; Zheng, Xu-Guang; Fujii, Takenori; Takabatake, Toshiro
• Is Part Of: Radiation physics and chemistry. Volume 175(2020:Oct.)
• Publication Date: 2020-10
• Subjects: Mineral tetrahedrite -- Metal-semiconductor transition -- X-ray absorption spectroscopy -- X-ray emission spectroscopy; Radiation chemistry -- Periodicals; Radiometry -- Periodicals; Radiation -- Periodicals; Chimie sous rayonnement -- Périodiques; 539.2
• DOI: 10.1016/j.radphyschem.2019.02.007
• Languages: English
• ISSNs: 0969-806X

Abstract

Abstract: The electronic structure of mineral tetrahedrite Cu12 Sb4 S13 showing a metal-semiconductor transition (MST) at TMST = 85 K has been investigated by means of Cu 1s x-ray absorption spectroscopy with the partial fluorescence yield mode (PFY-XAS) and Cu 2p-1s x-ray emission spectroscopy (XES). Remarkable changes are detected in both the PFY-XAS and XES spectra on cooling across TMST . The changes in the spectra indicate that the unoccupied Cu 3d and 4p densities of states (DOS) shift away from the Fermi energy (EF ). We conclude that the MST of Cu12 Sb4 S13 is associated with the decrease of the Cu 3d DOS at EF . Highlights: MST of Cu12 Sb4 S13 probed by Cu K PFY-XAS and XES. Partly unoccupied Cu 3d states in Cu12 Sb4 S13 . Reduced Cu 3d DOS at EF induces MST of Cu12 Sb4 S13 .