A relation between the resonance neutron peak and ARPES data in cuprates

Details A relation between the resonance neutron peak and ARPES data in cuprates A relation between the resonance neutron peak and ARPES data in cuprates

1999-06-03

arxiv.org/abs/cond-mat/9906051v1

PHYS. REV. LETT., v83, p1652 (1999)

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.83.1652

We argue that the resonant peak observed in neutron scattering experiments on superconducting cuprates and the peak/dip/hump features observed in ARPES measurements are byproducts of the same physical phenomenon. We argue that both are due to feedback effects on the damping of spin fluctuations in a $d-$wave superconductor. We consider the spin-fermion model at strong coupling, solve a set of coupled integral equations for fermionic and bosonic propagators and show that the dynamical spin susceptibility below $T_c$ possesses the resonance peak at $\Omega_{res} \propto \xi^{-1}$. The scattering of these magnetic excitations by electrons gives rise to a peak/dip/hump behavior of the electronic spectral function, the peak-dip separation is exactly $\Omega_{res}$.

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