J.R. Thompson, Yang Ren Sun, et al.
Physica A: Statistical Mechanics and its Applications
Paper
A new correlation for Tc from Cu 2p absorption
Abstract
We studied the Cu 2p x-ray absorption spectra of the superconductor La2-xSrxCuO4 in the doping regime x=0-0.6 and found that the intensity of the satellite peak is a reliable measure of the doping-induced hole concentration. From the Cu 2p absorption spectra taken in this work on the La2-xSrxCuO4 system and from those published for other high-temperature superconductors, we found that the energy separation between the satellite peak and the main peak, which is the ligand-hole energy, increases with Tc. © 1991.
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