Pressure Effects on the Transition Temperature and the Magnetic Field Penetration Depth in the Pyrochlore SuperconductorRbOs2O6

2004/04/22 by R. Khasanov, D. G. Eshchenko, J. Karpinski +12 · 2 citations
Materials Science · Medicine · Physics and Astronomy · #Advanced Condensed Matter Physics #Infectious Diseases and Tuberculosis #Nuclear materials and radiation effects #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.93.157004

published as Phys. Rev. Lett., v. 93, 157004 (2004). · 11 pages, 4 figures

arxiv created 2004/04/22 · openalex publication_date 2004/10/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

Abstract

Magnetization measurements under hydrostatic pressure up to 8 kbar in the pyrochlore superconductor RbOs₂O₆ (T_c\ensuremath≃6.3 K at p=0) were carried out. A positive pressure effect on T_c with dT_c/dp=0.090(3) K/kbar was observed, whereas no pressure effect on the magnetic penetration depth \ensuremathλ was detected. The pressure independent ratio 2\ensuremathΔ₀/k_BT_c=3.72(2) (\ensuremathΔ₀ is the superconducting gap at zero temperature) was found to be close to the BCS value 3.52. Magnetization and muon-spin rotation measurements of \ensuremathλ(T) indicate that RbOs₂O₆ is an adiabatic s-wave BCS-type superconductor. The value of \ensuremathλ extrapolated to zero temperature and ambient pressure was estimated to be 230(30) nm.

Citations

• Properties of boson-exchange superconductors

Cited by

• Neutron-Scattering Study of the Localized Mode in β-Pyrochlore Superconductors AOs2O6
• Superconducting Transition in the β-Pyrochlore AOs2O6 (A = Cs, Rb, K) under Pressure