Evolution of the quasiparticle spectral function in cuprates
We analyzed photoemission data for several doping levels of the Bi2Sr2CaCu2O8+x compounds, ranging from overdoped to underdoped. We show that the high frequency part of the spectra near (0,pi) can be described by Fermi liquid theory in the overdoped regime, but exhibits a non-Fermi liquid behavior in the underdoped regime. We further demonstrate that this behavior fits reasonably well to a 1/root omega behavior suggested for systems with strong spin fluctuations. [S0163-1829(98)50338-4].
Univ Wisconsin, Dept Phys, Madison, WI 53706 USA. Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland. Univ Dortmund, D-44221 Dortmund, Germany. USN, Res Lab, Washington, DC 20375 USA. Misra, S, Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 USA. firstname.lastname@example.org
ISI Document Delivery No.: 129WH
Record created on 2006-10-03, modified on 2016-08-08