Resonant magnetic mode in superconducting 2-leg ladders

Details Resonant magnetic mode in superconducting 2-leg ladders Resonant magnetic mode in superconducting 2-leg ladders

2004-01-31

arxiv.org/abs/cond-mat/0402011v1

Phys. Rev. B 69, 220406 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures

Scientific paper

10.1103/PhysRevB.69.220406

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.

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