Doping dependence of the mass enhancement in (Pb,Bi)2Sr2CaCu2O8 at the antinodal point in the superconducting and normal states.

作者: TK Kim , AA Kordyuk , SV Borisenko , A Koitzsch , M Knupfer

DOI: 10.1103/PHYSREVLETT.91.167002

关键词:

摘要: Angle-resolved photoemission spectroscopy is used to study the mass renormalization of charge carriers in high-${T}_{c}$ superconductor $(\mathrm{P}\mathrm{b},\mathrm{B}\mathrm{i}{)}_{2}{\mathrm{S}\mathrm{r}}_{2}{\mathrm{C}\mathrm{a}\mathrm{C}\mathrm{u}}_{2}{\mathrm{O}}_{8}$ vicinity $(\ensuremath{\pi},0)$ point superconducting and normal states. Using matrix element effects at different photon energies due a high momentum energy resolution bonding antibonding bands could be separated whole dopant range. A huge coupling bosonic collective mode observed below ${T}_{c}$ for both bands, particular, underdoped case. Above ${T}_{c}$, weaker continuous spectrum modes detected.

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