Two- and three-dimensional incommensurate modulation in optimally-dopedBi2Sr2CaCu2O8+δ

One dimensional ordering of doping oxygen in HgBa2Cuo4+δ superconductors evidenced by X-ray diffuse scattering

“…Although the presence of chains was thought to favor the charge transfer to the CuO 2 layers better than single Cu-O-Cu monomers [5], the formation of chains was considered a particularity of the YBCO compounds. Similar studies in other cuprate families were not attempted or not successful until the beginning of the new century, when studies on BSCCO superconductors revealed the existence of a two dimensional (2D) local order in these compounds [8,9]. We showed the intensity and correlation length of the observed X-ray diffuse scattering to depend on the transition temperature T c which links the 2D SRO to the electronic properties [10,11].…”

Absence of Broken Time-Reversal Symmetry in the Pseudogap State of the High TemperatureLa2−xSrxCuO4Superconductor from Muon-Spin-Relaxation Measurements

“…1. ) However, there has been much debate about the importance of superlattice structural distortions subsequently shown to exist in this material [7], and a later experiment on a material without these distortions saw no such effect [8].More recently, a spin-polarized neutron scattering group reported commensurate magnetic peaks below the pseudogap temperature in several samples of YBa 2 Cu 3 O 6x (YBCO) [9]. These results have since been reproduced in YBCO [10] and also HgBa 2 CuO 4 [11].…”

Lack of Evidence for Orbital-Current Effects in the High-TemperatureY2Ba4Cu7O15−δSuperconductor usingSträssle1, Roos2, Mali3 et al. 2008Phys. Rev. Lett.301300View full textAdd to dashboardCite

“…Various experimental attempts to assess the orbital-current models have been made, and provide evidence for breaking of time-reversal symmetry from observations of dichroism in angle-resolved photo emission spectroscopy (ARPES) measurements on Bi 2 Sr 2 CaCu 2 O 8+δ was reported [6]. However, it is possible that the observed effect is caused by super-lattice modulations [7]. Introduction of Pb removes these structural distortions.…”