Tuning the static spin-stripe phase and superconductivity in La_(2-x)Ba_xCuO_4 (x = 1/8) by hydrostatic pressure

Z. Guguchia; A. Maisuradze; G. Ghambashidze; R. Khasanov; A. Shengelaya; H. Keller

doi:10.1088/1367-2630/15/9/093005

Tuning the static spin-stripe phase and superconductivity in La_(2-x)Ba_xCuO_4 (x = 1/8) by hydrostatic pressure

Superconductivity 2013-09-26 v2

Authors: Z. Guguchia , A. Maisuradze , G. Ghambashidze , R. Khasanov , A. Shengelaya , H. Keller

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Abstract

Magnetization and muon spin rotation experiments were performed in La_(2-x)Ba_xCuO_4 (x = 1/8) as a function of hydrostatic pressure up to p = 2.2 GPa. It was found that the magnetic volume fraction of the static stripe phase strongly decreases linearly with pressure, while the superconducting volume fraction increases by the same amount. This demonstrates competition between bulk superconductivity and static magnetic order in the stripe phase of La_1.875Ba_0.125CuO_4 and that these phenomena occur in mutually exclusive spatial regions. The present results also reveal that the static spin-stripe phase still exists at pressures, where the long-range low-temperature tetragonal (LTT) structure is completely suppressed. This indicates that the long-range LTT structure is not necessary for stabilizing the static spin order in La_1.875Ba_0.125CuO_4.

Keywords

high-temperature superconductivity spin-stripe phase hydrostatic pressure La_(2-x)Ba_xCuO_4 muon spin rotation magnetic order

Cite

@article{arxiv.1303.3865,
  title  = {Tuning the static spin-stripe phase and superconductivity in La_(2-x)Ba_xCuO_4 (x = 1/8) by hydrostatic pressure},
  author = {Z. Guguchia and A. Maisuradze and G. Ghambashidze and R. Khasanov and A. Shengelaya and H. Keller},
  journal= {arXiv preprint arXiv:1303.3865},
  year   = {2013}
}

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12 pages, 4 figures

Tuning the static spin-stripe phase and superconductivity in La_(2-x)Ba_xCuO_4 (x = 1/8) by hydrostatic pressure

Abstract

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