Spin susceptibility of underdoped cuprates: the case of Ortho-II YBa_2Cu_3O_{6.5}

Abstract

Recent inelastic neutron scattering measurements found that the spin susceptibility of detwinned and highly ordered ortho-II YBa_2Cu_3O_{6.5} exhibits, in both the normal and superconducting states, one-dimensional incommensurate modulations at low energies which were interpreted as a signature of dynamic stripes. We propose an alternative model based on quasiparticle transitions between the arcs of a truncated Fermi surface. Such transitions are resonantly enhanced by scattering to the triplet spin resonance. We show that the anisotropy in the experimental spin response is consistent with this model if the gap at the saddle points is anisotropic.

arXiv comment5 fives, 3 postscript figures

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Cited by in corpus (6)

• A Phenomenological Theory of the Anomalous Pseudogap Phase in Underdoped Cuprates
• Spin dynamics near the critical doping in weakly-superconducting underdoped YBa2Cu3O6.35 (Tc=18K)
• High-energy magnetic excitations from dynamic stripes in LBCO (x=1/8)
• Evidence for decay of spin-waves above the pseudogap in underdoped YBa2Cu3O6.35
• Phenomenological theory of the underdoped phase of a high-T${}_c$ superconductor
• Separation of magnetic and superconducting behaviour in YBCO6.33 (Tc=8.4 K)