title: Comparative study of the pressure effects on the magnetic penetration depth in electron- and hole-doped cuprate superconductors.
abstract: The effect of pressure on the magnetic penetration depth λ was tested for the hole-doped superconductor YBa(2)Cu(3)O(7-δ) and in the electron-doped one Sr(0.9)La(0.1)CuO(2) by means of magnetization measurements. Whereas a large change of λ was found in YBa(2)Cu(3)O(7-δ), 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 Sr(0.9)La(0.1)CuO(2), 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 Sr(0.9)La(0.1)CuO(2), giving a strong contribution to the long debated asymmetric consequences of hole and electron doping in cuprate superconductors.
authors.affiliation: CNR-INFM-Coherentia and Dipartimento di Ingegneria Meccanica, Universita' di Roma 'Tor Vergata', Via del Politecnico 1, I-00133 Roma, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Di Castro
authors.forename: R
authors.initials: R
authors.lastname: Khasanov
authors.forename: A
authors.initials: A
authors.lastname: Shengelaya
authors.forename: K
authors.initials: K
authors.lastname: Conder
authors.forename: D-J
authors.initials: DJ
authors.lastname: Jang
authors.forename: M-S
authors.initials: MS
authors.lastname: Park
authors.forename: S-I
authors.initials: SI
authors.lastname: Lee
authors.forename: H
authors.initials: H
authors.lastname: Keller