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Doping dependence of many-body effects along the nodal direction in the high-Tccuprate(Bi,Pb)2Sr2CaCu2O8
Doping dependence of many-body effects along the nodal direction in the high-Tccuprate(Bi,Pb)2Sr2CaCu2O8
Angle-resolved photoemission spectroscopy (ARPES) is used to study the doping dependence of the lifetime and the mass renormalization of the low-energy excitations in high-${T}_{c}$ cuprate $(\mathrm{B}\mathrm{i},\mathrm{P}\mathrm{b}{)}_{2}{\mathrm{Sr}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8}$ along the zone diagonal. We find a linear energy dependence of the scattering rate for the underdoped samples and a quadratic energy dependence for the overdoped case. The mass enhancement of the quasiparticles due to the many body effects at the Fermi energy is found to be in the order of 2 and the renormalization extends over a large energy range for both the normal and the superconducting state. The much discussed kink in the dispersion around 70 meV is interpreted as a small additional effect at low temperatures.
Microsoft Academic Graph classification: Superconductivity Physics Condensed matter physics Photoemission spectroscopy Order (ring theory) Angle-resolved photoemission spectroscopy Fermi energy Quasiparticle Cuprate Atomic physics Energy (signal processing)
Condensed Matter Physics, Electronic, Optical and Magnetic Materials
Condensed Matter Physics, Electronic, Optical and Magnetic Materials
Microsoft Academic Graph classification: Superconductivity Physics Condensed matter physics Photoemission spectroscopy Order (ring theory) Angle-resolved photoemission spectroscopy Fermi energy Quasiparticle Cuprate Atomic physics Energy (signal processing)
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