Resonant magnetic mode in superconducting 2-leg ladders

Abstract

The spin dynamics of a doped 2-leg spin ladder is investigated by numerical techniques. We show that a hole pair-magnon boundstate evolves at finite hole doping into a sharp magnetic excitation below the two-particle continuum. This is supported by a field theory argument based on a SO(6)-symmetric ladder. Similarities and differences with the resonant mode of the high-T${}_c$ cuprates are discussed.

5 pages, 5 figures

References in corpus (4)

• Haldane-Gapped Spin Chains as Luttinger Liquids: Correlation Functions at Finite Field
• Finite temperature spectral function of Mott insulators and CDW States
• Charge density correlations in t-J ladders investigated by the CORE method
• Two-Hole and Four-Hole Bound States in a t-J Ladder at half-filling

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