The effect of pressure on the magnetic penetration depth lambda was tested for the hole-doped superconductor YBa2Cu3O7-delta and in the electron-doped one Sr0.9La0.1CuO2 by means of magnetization measurements. Whereas a large change of lambda was found in YBa2Cu3O7-delta, confirming the non-adiabatic character of the electron-phonon coupling in hole-doped superconductors, the same quantity is not affected by pressure in electron-doped Sr0.9La0.1CuO2, suggesting a close similarity of the latter to conventional adiabatic Bardeen-Cooper-Schrieffer superconductors. The present results imply a remarkable difference between the electronic properties of hole-doped cuprates and electron-doped Sr0.9La0.1CuO2, giving a strong contribution to the long debated asymmetric consequences of hole and electron doping in cuprate superconductors.
DI CASTRO, D., Khasanov, R., Shengelaya, A., Conder, K., Jang, D., Park, M., et al. (2009). Comparative study of the pressure effects on the magnetic penetration depth in electron- and hole-doped cuprate superconductors. JOURNAL OF PHYSICS. CONDENSED MATTER, 21(27) [10.1088/0953-8984/21/27/275701].
Comparative study of the pressure effects on the magnetic penetration depth in electron- and hole-doped cuprate superconductors
DI CASTRO, DANIELE;
2009-01-01
Abstract
The effect of pressure on the magnetic penetration depth lambda was tested for the hole-doped superconductor YBa2Cu3O7-delta and in the electron-doped one Sr0.9La0.1CuO2 by means of magnetization measurements. Whereas a large change of lambda was found in YBa2Cu3O7-delta, confirming the non-adiabatic character of the electron-phonon coupling in hole-doped superconductors, the same quantity is not affected by pressure in electron-doped Sr0.9La0.1CuO2, suggesting a close similarity of the latter to conventional adiabatic Bardeen-Cooper-Schrieffer superconductors. The present results imply a remarkable difference between the electronic properties of hole-doped cuprates and electron-doped Sr0.9La0.1CuO2, giving a strong contribution to the long debated asymmetric consequences of hole and electron doping in cuprate superconductors.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
