Physics – Condensed Matter – Superconductivity
Scientific paper
2010-03-18
J. Phys.: Condens. Matter 21, N. 27, 275701 (2009).
Physics
Condensed Matter
Superconductivity
9 pages, 3 figures
Scientific paper
The effect of pressure on the magnetic penetration depth $\lambda$ 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 $\lambda$ 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.
Castro Daniele Di
Conder Kazimierz
Jang Dong-Jin
Keller Hugo
Khasanov Rustem
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