Pressure effect on the in-plane magnetic penetration depth in YBa_2Cu_4O_8

R. Khasanov; J. Karpinski; H. Keller

doi:10.1088/0953-8984/17/15/016

Pressure effect on the in-plane magnetic penetration depth in YBa_2Cu_4O_8

Superconductivity 2009-11-10 v1

Authors: R. Khasanov , J. Karpinski , H. Keller

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Abstract

We report a study of the pressure effect (PE) on the in-plane magnetic field penetration depth lambda_{ab} in YBa_2Cu_4O_8 by means of Meissner fraction measurements. A pronounced PE on lambda_{ab}^{-2}(0) was observed with a maximum relative shift of \Delta\lambda^{-2}_{ab}/\lambda^{-2}_{ab}= 44(3)% at a pressure of 10.2 kbar. It arises from the pressure dependence of the effective in-plane charge carrier mass and pressure induced charge carrier transfer from the CuO chains to the superconducting CuO_2 planes. The present results imply that the charge carriers in YBa_2Cu_4O_8 are coupled to the lattice.

Keywords

pressure effect magnetic penetration depth YBa2Cu4O8 Meissner fraction charge carrier transfer CuO chains

Cite

@article{arxiv.cond-mat/0405643,
  title  = {Pressure effect on the in-plane magnetic penetration depth in YBa_2Cu_4O_8},
  author = {R. Khasanov and J. Karpinski and H. Keller},
  journal= {arXiv preprint arXiv:cond-mat/0405643},
  year   = {2009}
}

Comments

4pages 3 figures

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