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arXiv · 1003.3628

Comparative study of the pressure effects on the magnetic penetration depth in electron- and hole-doped cuprate superconductors

D. Di Castro·R. Khasanov·A. Shengelaya·K. Conder·D. -J. Jang·M. -S. Park·S. -I. Lee·H. Keller
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Abstract

The effect of pressure on the magnetic penetration depth $λ$ was tested in the hole-doped superconductor YBa2Cu3O(7-d) and in the electron-doped one Sr0.9La0.1CuO2 by means of magnetization measurements. Whereas a large change of $λ$ was found in YBa2Cu3O(7-d), confirming the non-adiabatic character of the electron-phonon coupling in hole-doped superconductors, the same quantity is not affected by pressure in the electron-doped Sr0.9La0.1CuO2, suggesting a close similarity of the latter to conventional adiabatic BCS superconductors. The present results imply a remarkable difference between the electronic properties of hole-doped cuprates and the electron-doped Sr0.9La0.1CuO2, giving a strong contribution to the long debated asymmetric consequences of hole- and electron-doping in cuprate superconductors.

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D. Di Castro, R. Khasanov, A. Shengelaya, K. Conder, D. -J. Jang, M. -S. Park, S. -I. Lee, H. Keller. 2010-03-18. Comparative study of the pressure effects on the magnetic penetration depth in electron- and hole-doped cuprate superconductors. https://arxiv.org/abs/1003.3628

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