Dispersion of the odd magnetic resonant mode in near-optimally doped Bi2Sr2CaCu2O8+d

Details Dispersion of the odd magnetic resonant mode in near-optimally doped Bi2Sr2CaCu2O8+d Dispersion of the odd magnetic resonant mode in near-optimally doped Bi2Sr2CaCu2O8+d

2007-01-03

arxiv.org/abs/cond-mat/0701052v1

Phys. Rev. B 76, 214512 (2007)

Physics

Condensed Matter

Superconductivity

10 figures

Scientific paper

10.1103/PhysRevB.76.214512

We report a neutron scattering study of the spin excitation spectrum in the superconducting state of slightly overdoped Bi2Sr2CaCu2O8+d system (Tc=87 K). We focus on the dispersion of the resonance peak in the superconducting state that is due to a S=1 collective mode. The measured spin excitation spectrum bears a strong similarity to the spectrum of the YBa2Cu3O6+x system for a similar doping level i.e. x= 0.95-1), which consists of intersecting upward- and downward-dispersing branches. A close comparison of the threshold of the electron-hole spin flip continuum, deduced from angle resolved photo-emission measurements in the same system, indicates that the magnetic response in the superconducting state is confined, in both energy and momentum, below the gapped Stoner continuum. In contrast to YBa2Cu3O6+x, the spin excitation spectrum is broader than the experimental resolution. In the framework of an itinerant-electron model, we quantitatively relate this intrinsic energy width to the superconducting gap distribution observed in scanning tunnelling microscopy experiments. Our study further suggests a significant in-plane anisotropy of the magnetic response.

Affiliated with

Also associated with

No associations

Rating

Dispersion of the odd magnetic resonant mode in near-optimally doped Bi2Sr2CaCu2O8+d 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 Dispersion of the odd magnetic resonant mode in near-optimally doped Bi2Sr2CaCu2O8+d, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dispersion of the odd magnetic resonant mode in near-optimally doped Bi2Sr2CaCu2O8+d will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-563612