Magnetic Resonance, Electronic spectra and Bilayer Splitting in Underdoped Bi2212

Details Magnetic Resonance, Electronic spectra and Bilayer Splitting in Underdoped Bi2212 Magnetic Resonance, Electronic spectra and Bilayer Splitting in Underdoped Bi2212

2001-02-19

arxiv.org/abs/cond-mat/0102339v1

Physics

Condensed Matter

Superconductivity

5 pages, revtex, 5 encapsulated postscript figures

Scientific paper

We report the first inelastic neutron scattering (INS) experiments of the resonance in the underdoped regime of Bi2Sr2CaCu2O8+d. The energy of the resonance is found to be 34 meV and the temperature dependence shows a smooth evolution through Tc with a remnant persisting in the pseudogap state. Besides the INS data, we present also angle resolved photoemission (ARPES) spectra taken on the same crystals. As a function of temperature, the neutron intensity scales with the square of the ARPES gap estimated by the leading-edge midpoint at (pi,0). We also show that the energy of the collective mode inferred from the peak-dip-hump structure compares well with the energy of the resonance. Based on kinematics, we argue that the correlation of these two energies is consistent with the absence of bilayer splitting in the electronic dispersion.

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