arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0708.2374cond-mat.supr-con
收藏

铜氧化物超导体多序参量的普适观测

Universal observation of multiple order parameters in cuprate superconductors

R. Khasanov, S. Strässle, D. Di Castro, T. Masui, S. Miyasaka, S. Tajima, A. Bussmann-Holder, H. Keller

摘要:

测量了YBa_2Cu_3 O_{7-δ}单晶沿三个主晶向(a,b,c)的伦敦穿透深度λ随温度的变化关系。两个面内分量(λ_a和λ_b)在它们的温度依赖性中显示出拐点,这在沿c方向的分量(λ_c)中不存在。这些数据提供了令人信服的证据,在平面超导序参量是一个混合物的s+ d波对称,而它是专门的s波沿c方向。结合前人的研究结果,我们得出结论,耦合s+d-序参量是普遍的和内在的铜氧化物超导体。

英文摘要:

The temperature dependence of the London penetration depth λwas measured for an untwined single crystal of YBa_2Cu_3O_{7-δ} along the three principal crystallographic directions (a, b, and c). Both in-plane components (λ_a and λ_b) show an inflection point in their temperature dependence which is absent in the component along the c-direction (λ_c). The data provide convincing evidence that the in-plane superconducting order parameter is a mixture of s+d-wave symmetry whereas it is exclusively s-wave along the c-direction. In conjunction with previous results it is concluded that coupled s+d-order parameters are universal and intrinsic to cuprate superconductors.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑