Is the pi-particle responsible for the 41 meV peak in YBa_2Cu_3O_7?

Abstract

It is argued that there is no low-energy resonance associated with the pi-operators introduced by Demler and Zhang. This implies that the Hubbard model does not possess an approximate SO(5) symmetry generated by these operators. Recent finite-size studies are re-interpreted accordingly.

3 pages, latex (revtex)

References in corpus (1)

• Finite-Size Studies on the SO(5) Symmetry of the Hubbard Model

Cited by in corpus (16)

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• Projected SO(5) Models
• Where is the pi particle?
• Revisiting two holes in a locally antiferromagnetic background: the role of retardation and Coulomb repulsion effects
• SO(5) Invariance and Effective Field Theory for High-Tc Superconductors
• Influence of higher d-wave gap harmonics on the dynamical magnetic susceptibility of high-temperature superconductors
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• Critical properties of projected SO(5) models at finite temperatures
• A Microscopic Derivation of the SO(5)-Symmetric Landau-Ginzburg Potential
• Excitations in antiferromagnetic cores of superconducting vortices
• SO(5)-Symmetric Description of the Low Energy Sector of a Ladder System
• SO(5) Symmetry in t-J and Hubbard Models
• Electromagnetic Response and Approximate SO(5) Symmetry in High-Tc Superconductors