Temperature and doping dependence of x-ray absorption spectral weight in YBa2Cu3Oy
Abstract
The comprehensive study of the temperature dependent x-ray absorption spectroscopy (XAS) could be attributed to a dynamical spectral weight α in YBa2Cu3Oy (YBCO). Large spectral weight changes with the temperature for both the Upper Hubbard band and the Zhang-Rice band due to dynamics of holes are experimentally found in the underdoped regime. These spectral weight changes become larger when the doping level p goes deeper into the underdoped regime, but quickly vanishes as p goes to the undoped limit. Our results clearly indicate that the pseudogap is related to the double occupancy and originates from bands in higher energies.
This work was supported by NSC of Taiwan.- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2013
- Bibcode:
- 2013APS..MARM35011L