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

Di Castro, D.; Khasanov, R.; Shengelaya, A.; Conder, K.; Jang, D.J.; Park, M.S.; Lee, S.I.; Keller, H.

doi: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 D, Khasanov R, Shengelaya A, Conder K, Jang DJ, Park MS, Lee SI & Keller H

Citation

Di Castro, D., Khasanov, R., Shengelaya, A., Conder, K., Jang, D. J., Park, M. S., … Keller, H. (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), 275701 (5 pp.). https://doi.org/10.1088/0953-8984/21/27/275701

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:17380

The effect of pressure on the magnetic penetration depth λ was tested for the hole-doped superconductor YBa₂Cu₃O_7−δ and in the electron-doped one Sr_0.9La_0.1CuO₂ by means of magnetization measurements. Whereas a large change of λ was found in YBa₂Cu₃O_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_0.9La_0.1CuO₂, 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 Sr_0.9La_0.1CuO₂, giving a strong contribution to the long debated asymmetric consequences of hole and electron doping in cuprate superconductors.