Study of the magnetic penetration depth in RbOs_2O_6
Study of the magnetic penetration depth in RbOs_2O_6
复制标题
RbOs_2O_6磁穿透深度的研究
DOI：
10.1103/physrevb.72.104504
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发表时间：
2004
影响因子：
3.7
通讯作者：
H. Keller
中科院分区：
文献类型：
--
作者：
R. Khasanov;D. Eshchenko;D. Castro;A. Shengelaya;F. Mattina;A. Maisuradze;C. Baines;H. Luetkens;J. Karpiński;S. Kazakov;H. Keller
用μ子自旋旋转（μ SR）技术测量了烧绿石超导体RbOs 2 O 6（Tc = 6.3K）的磁场穿透深度λ.在低温下，\lambda^{-2}（T）饱和，并在T\simeq <0.2T_c时变为常数，这与弱耦合s波BCS超导体的预期一致。发现T=0时的λ值在250 nm至300 nm的范围内。μ SR和平衡磁化测量都表明，在低温下，$\lambda$几乎（在10%的水平）独立于所施加的磁场。这一结果表明RbOs_2O_6的超导能隙是各向同性的。
Measurements of the magnetic field penetration depth \lambda in the pyrochlore superconductor RbOs_2O_6 (T_c\simeq6.3 K) were carried out by means of the muon-spin-rotation (\muSR) technique. At low temperatures \lambda^{-2}(T) saturates and becomes constant below T\simeq 0.2T_c, in agreement with what is expected for weak-coupled s-wave BCS superconductors. The value of \lambda at T=0 was found to be in the range of 250 nm to 300 nm. \muSR and equilibrium magnetization measurements both reveal that at low temperatures $\lambda$ is almost (at the level of 10%) independent of the applied magnetic field. This result suggests that the superconducting energy gap in RbOs_2O_6 is isotropic.