Strength of the Spin-Fluctuation-Mediated Pairing Interaction in a High-Temperature Superconductor

Details Strength of the Spin-Fluctuation-Mediated Pairing Interaction in a High-Temperature Superconductor Strength of the Spin-Fluctuation-Mediated Pairing Interaction in a High-Temperature Superconductor

2008-12-19

arxiv.org/abs/0812.3860v1

Nature Physics 5, 217 (2009)

Physics

Condensed Matter

Superconductivity

25 pages, 7 figures, including supplementary information, accepted for publication in Nature Physics

Scientific paper

10.1038/nphys1180

Theories based on the coupling between spin fluctuations and fermionic quasiparticles are among the leading contenders to explain the origin of high-temperature superconductivity, but estimates of the strength of this interaction differ widely. Here we analyze the charge- and spin-excitation spectra determined by angle-resolved photoemission and inelastic neutron scattering, respectively, on the same crystals of the high-temperature superconductor YBa2Cu3O6.6. We show that a self-consistent description of both spectra can be obtained by adjusting a single parameter, the spin-fermion coupling constant. In particular, we find a quantitative link between two spectral features that have been established as universal for the cuprates, namely high-energy spin excitations and "kinks" in the fermionic band dispersions along the nodal direction. The superconducting transition temperature computed with this coupling constant exceeds 150 K, demonstrating that spin fluctuations have sufficient strength to mediate high-temperature superconductivity.

Affiliated with

Also associated with

No associations

Rating

Strength of the Spin-Fluctuation-Mediated Pairing Interaction in a High-Temperature Superconductor does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Strength of the Spin-Fluctuation-Mediated Pairing Interaction in a High-Temperature Superconductor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strength of the Spin-Fluctuation-Mediated Pairing Interaction in a High-Temperature Superconductor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-727233