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

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

2004-05-27

arxiv.org/abs/cond-mat/0405643v1

J. Phys.: Condens. Matter 17, 2453 (2005)

Physics

Condensed Matter

Superconductivity

4pages 3 figures

Scientific paper

10.1088/0953-8984/17/15/016

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.

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