Quantitative determination of pairing interactions for high-temperature superconductivity in cuprates.

ABSTRACT: A profound problem in modern condensed matter physics is discovering and understanding the nature of fluctuations and their coupling to fermions in cuprates, which lead to high-temperature superconductivity and the invariably associated strange metal state. We report the quantitative determination of normal and pairing self-energies, made possible by laser-based angle-resolved photoemission measurements of unprecedented accuracy and stability. Through a precise inversion procedure, both the effective interactions in the attractive d-wave symmetry and the repulsive part in the full symmetry are determined. The latter is nearly angle-independent. Near T c, both interactions are nearly independent of frequency and have almost the same magnitude over the complete energy range of up to about 0.

SUBMITTER: Bok JM 

PROVIDER: S-EPMC4783123 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature