Doping-dependent energy scale of the low-energy band renormalization in (Bi,Pb)2(Sr,La)2CuO6+d

Abstract

The nodal band-dispersion in (Bi,Pb)2(Sr,La)2CuO6+d (Bi2201) is investigated over a wide range of doping by using 7-eV laser-based angle-resolved photoemission spectroscopy. We find that the low-energy band renormalization ("kink"), recently discovered in Bi2Sr2CaCu2O8+d (Bi2212), also occurs in Bi2201, but at a binding energy around half that in Bi2212, implying its scaling to Tc. Surprisingly the coupling-energy dramatically increases with a decrease of carrier concentration, showing a sharp enhancement across the optimal doping. This strongly contrasts to other mode-couplings at higher binding-energies (~20, ~40, and ~70 meV) with almost no doping variation in energy scale. These nontrivial properties of the low-energy kink (material- and doping-dependence of the coupling-energy) demonstrate the significant correlation among the mode-coupling, the Tc, and the strong electron correlation.

References in corpus (10)

• Direct observation of competition between superconductivity and charge density wave order in YBa2Cu3Oy
• Direct evidence for a competition between the pseudogap and high temperature superconductivity in the cuprates
• Phase competition in trisected superconducting dome
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• Photoemission kinks and phonons in cuprates
• Coupling of Low Energy Electrons in Optimally Doped Bi2212 to an Optical Phonon Mode
• Quantitative Determination of Eliashberg Function and Evidence of Strong Electron Coupling with Multiple Phonon Modes in Heavily Over doped (Bi,Pb)2Sr2CuO6
• Doping-dependence of nodal quasiparticle properties in high-$T_{\mathrm{c}}$ cuprates studied by laser-excited angle-resolved photoemission spectroscopy
• Origins of large critical temperature variations in single layer cuprates

Cited by in corpus (17)

• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Energy gaps in high-transition temperature cuprate superconductors
• Point nodes persisting far beyond Tc in Bi2212
• Observation of small Fermi pockets protected by clean CuO2 sheets of a high-Tc superconductor
• Angle-resolved photoemission spectroscopy study of HgBa${}_2$CuO${}_{4+\delta }$
• Low-Temperature and High-Energy-Resolution Laser Photoemission Spectroscopy
• Deep learning-based statistical noise reduction for multidimensional spectral data
• Unmasking the Origin of Kinks in the Photoemission Spectra of Cuprate Superconductors
• Mode-selective coupling of coherent phonons to the Bi2212 electronic band structure
• Persistent low-energy phonon broadening near the charge order $q$-vector in bilayer cuprate Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Strong interaction between electrons and collective excitations in multiband superconductor MgB2
• Direct observation of self energy signatures of the resonant collective mode in Bi2Sr2CaCu2O8
• Sharp low energy feature in single-particle spectra due to forward scattering in $d$-wave cuprate superconductors
• Low-energy phonons in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ and their possible interaction with electrons measured by inelastic neutron scattering
• Anomalous doping evolution of nodal dispersion revealed by in-situ ARPES on continuously doped cuprates
• Three interaction energy scales in single-layer high-T${}_C$ cuprate HgBa${}_2$CuO${}_{4+\delta }$
• Reverse process of usual optical analysis of boson-exchange superconductors: impurity effects on $s$- and $d$-wave superconductors