Macroscopic Quantum Coherence of the Spin Triplet in the Spin-Ladder Compound Sr14Cu24O41

Emilio Lorenzo; L. P. Regnault; Cyrille Boullier; Nicolas Martin; A. H. Moudden; S. Vanishri; Christophe Marin; A. Revcolevschi

doi:10.1103/PhysRevLett.105.097202

Macroscopic Quantum Coherence of the Spin Triplet in the Spin-Ladder Compound Sr14Cu24O41

Strongly Correlated Electrons 2014-04-11 v1

Authors: Emilio Lorenzo , L. P. Regnault , Cyrille Boullier , Nicolas Martin , A. H. Moudden , S. Vanishri , Christophe Marin , A. Revcolevschi

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Abstract

We report the direct observation by inelastic neutron scattering experiments of a spin triplet of magnetic excitations in the response associated with the ladders in the composite cuprate Sr14Cu24O41. This appears as a peak at q_{Q1D}=\pi and energy \Delta_1=32.5 meV, and we conjecture that all the triplets making up this conspicuous peak have the same phase and therefore interpret it as the signature of the occurrence of quantum coherence along the ladder direction between entangled spin pairs. From the comparison with previous neutron and x-ray data, we conclude that the temperature evolution of this mode is driven by the crystallization of holes into a charge density wave in the ladder sublattice

Keywords

spin ladder Sr14Cu24O41 spin triplet macroscopic quantum coherence inelastic neutron scattering

Cite

@article{arxiv.1404.2890,
  title  = {Macroscopic Quantum Coherence of the Spin Triplet in the Spin-Ladder Compound Sr14Cu24O41},
  author = {Emilio Lorenzo and L. P. Regnault and Cyrille Boullier and Nicolas Martin and A. H. Moudden and S. Vanishri and Christophe Marin and A. Revcolevschi},
  journal= {arXiv preprint arXiv:1404.2890},
  year   = {2014}
}

Macroscopic Quantum Coherence of the Spin Triplet in the Spin-Ladder Compound Sr14Cu24O41

Abstract

Keywords

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