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Novel dynamic scaling regime in hole-doped La2CuO4

Strongly Correlated Electrons 2007-05-23 v1 Superconductivity
Authors: Wei Bao , Y. Chen , Y. Qiu , J. L. Sarrao
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Abstract

Only 3% hole doping by Li is sufficient to suppress the long-range 3-dimensional (3D) antiferromagnetic order in La2CuO4. The spin dynamics of such a 2D spin liquid state at T << J was investigated with measurements of the dynamic magnetic structure factor S(omega,q), using cold neutron spectroscopy, for single crystalline La2Cu0.94Li0.06O4. S(omega,q) peaks sharply at (pi,pi) and crosses over around 50K from omega/T scaling to a novel low temperature regime characterized by a constant energy scale. The possible connection to a crossover from the quantum critical to the quantum disordered regime of the 2D antiferromagnetic spin liquid is discussed.

Keywords

hole-doped La2CuO4 spin liquid dynamic structure factor quantum criticality neutron spectroscopy

Cite

@article{arxiv.cond-mat/0307605,
  title  = {Novel dynamic scaling regime in hole-doped La2CuO4},
  author = {Wei Bao and Y. Chen and Y. Qiu and J. L. Sarrao},
  journal= {arXiv preprint arXiv:cond-mat/0307605},
  year   = {2007}
}

Comments

4 pages, 4 figures

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