2003/12/23 by M. R. Trunin, М. Р. Трунин, Yu. A. Nefyodov +1
Chemistry · Physics and Astronomy · #Analytical Chemistry (journal) #Chemistry #Condensed matter physics #Conductivity #Crystallography #Cuprate #Electrical resistivity and conductivity #Lambda #Magnetic properties of thin films #Order (exchange) #Physics #Physics of Superconductivity and Magnetism #Pseudogap #Quantum mechanics #Superconductivity #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1088/0953-2048/17/8/025
7 pages, 9 figures, presented at EUCAS 2003 (September 14-18), submitted to SUST
arxiv created 2003/12/23 · openalex publication_date 2004/06/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The in-plane and out-of-plane surface impedance and microwave conductivity components of one and the same YBa2Cu3O7-x (0.07≤ x≤ 0.47) single crystal are determined in the wide ranges of temperature T and carrier concentration p in CuO2 planes. The following features of the superfluid density ns(T,p)∝λab-2(T,p) are observed at T<Tc/2 and 0.078≤ p≤ 0.16: (i) ns(0,p) depends linearly on p, (ii) the derivative |dns(T,p)/dT|T→ 0 depends on p slightly in the optimally and moderately doped regions (0.10<p≤ 0.16); however, it rapidly increases with p further lowering and (iii) the latter finding is accompanied by the linear low-temperature dependence Δ ns(T)∝(-T) changing to Δ ns(T)∝(-√(T)). For optimum oxygen content the temperature dependence of the normalized imaginary part of the c-axis conductivity λc2(0)/λc2(T) is found to be strikingly similar to that of λab2(0)/λab2(T) and becomes more convex with p lowering. λc-2(0,p) values are roughly proportional to the normal state conductivities σc(Tc,p) along the c-axis. All these properties can be treated in the framework of d-density wave order of pseudogap.