2003/12/22 by M. R. Trunin, М. Р. Трунин, Yu. A. Nefyodov +1 · 4 citations
Engineering · Physics and Astronomy · #Magnetic confinement fusion research #Physics of Superconductivity and Magnetism #Superconducting Materials and Applications #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.92.067006
published as Phys. Rev. Lett. 92, 067006 (2004) · 4 pages, 5 figures. To be published in Phys.Rev.Lett
arxiv created 2003/12/22 · openalex publication_date 2004/02/11 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
The investigation of the penetration depth \ensuremathλab(T,p) in YBa2Cu3O_7\ensuremath-x crystals allowed one to observe the following features of the superfluid density ns(T,p)\ensuremath∝\ensuremathλab^\ensuremath-2(T,p) as a function of temperature T<Tc/2 and carrier concentration 0.078\ensuremath≤p\ensuremath≤0.16 in CuO2 planes: (i) ns(0,p) depends linearly on p; (ii) the derivative |dns(T,p)/dT|_T\ensuremath→0 depends on p slightly in the optimally and moderately doped regions (0.10<p\ensuremath≤0.16), however, it rapidly increases with p further lowering; (iii) the latter finding is accompanied by the linear low-temperature dependence [\ensuremath-\ensuremathΔns(T)]\ensuremath∝T changing to [\ensuremath-\ensuremathΔns(T)]\ensuremath∝√(T). All these peculiarities can be treated in the framework of the d-density-wave scenario of electronic processes in underdoped high-Tc materials.