Coordination of the energy and temperature scales of pairing across the doping phase diagram of Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$

T. J. Reber; S. Parham; N. C. Plumb; Y. Cao; H. Li; Z. Sun; Q. Wang; H. Iwasawa; J. S. Wen; Z. J. Xu; G. Gu; S. Ono; H. Berger; Y. Yoshida; H. Eisaki; Y. Aiura; G. B. Arnold; D. S. Dessau

paper

Coordination of the energy and temperature scales of pairing across the doping phase diagram of Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + δ}$

arXiv:1509.01556

Abstract

Using a new variant of photoelectron spectroscopy, we measure the homogeneous near-nodal pairing ( $Δ$ ) and pair-breaking self-energy ( $Γ_{S}$ ) processes for a wide range of doping levels of Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + δ}$ . For all samples we find that the pairing extends above the superconducting transition T $_{c}$ to a scale T $_{P ai r}$ that is distinct from the antinodal pseudogap scale T $^{*}$ and near but slightly above T $_{c}$ . We find that $Δ$ and T $_{P ai r}$ are related with a strong coupling ratio 2 $Δ$ /k $_{B}$ T $_{P ai r} \approx 6$ across the entire doping phase diagram, i.e. independent of the effects of antinodal pseudogaps or charge-density waves.

Coordination of the energy and temperature scales of pairing across the doping phase diagram of Bi2​Sr2​CaCu2​O8+δ​

Abstract

Coordination of the energy and temperature scales of pairing across the doping phase diagram of Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + δ}$