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.