Anomalous superconducting properties at magic doping levels in under-doped La2-xSrxCuO4 single crystals
arXiv:cond-mat/0309034 · doi:10.1016/j.physc.2004.03.014
Abstract
A series of high-quality under-doped La2-xSrxCuO4 superconductor crystals with x = 0.063 - 0.125 were prepared by traveling-solvent floating-zone (TSFZ) technique. We found by dc magnetic measurements that, in this series of crystals, the superconducting transition was quite sharp in the vicinity of the hole densities of x = 1/16 and x = 1/9 while it was much broader away from these two "magic numbers", and the Meissner fraction showed a remarkable minimum near x = 1/9. We concluded that these phenomena are reflections of intrinsic properties of this cuprate system. Our observations are discussed in light of recently proposed composite charge model together with charge inhomogeneity and electronic phase separations.
arXiv comment4 pages, 4 figures; Presented at the 7th Intl. Conf. M2S.(Rio de Janeiro, May 2003)
References in corpus (10)
- Angle-resolved photoemission spectroscopy of the cuprate superconductors
- Discovery of microscopic electronic inhomogeneity in the high-Tc superconductor Bi2Sr2CaCu2O8+x
- Observation of New Incommensurate Magnetic Correlations at the Lower Critical Concentration for Superconductivity (x=0.05) in La(2-x)Sr(x)CuO4
- Electronic phase separation in lightly-doped LaSrCuO
- (63)Cu NQR Evidence for Spatial Variation of Hole Concentration in La(2-x)Sr(x)CuO(4)
- An Intrinsic Tendency of Electronic Phase Separation into Two Superconducting States in La(2-x)Sr(x)CuO(4+delta)
- Wigner Lattice Order, Collective Mode, and Superconductivity in La1.985Sr0.015CuO4+delta System
- Under-doped La2-xSrxCuO4 with x = 0.063 - 0.125: TSFZ growth of high-quality crystals and anomalous doping dependences of superconducting properties
- The composite picture of the charge carriers in La2-xSrxCuO4 (0.063 < x < 0.11) superconductors
- Novel Insulator to Metal Transition and Superconductivity in Sr-doped La2CuO4
Cited by in corpus (6)
- Magic Doping Fractions in High-Temperature Superconductors
- Robust intrinsic electronic superconducting phases in underdoped La_{2-x}Sr_xCuO4 single crystals
- Observation of the predicted charge collective mode of the Tc = 45 K superconducting phase of La2CuO4+δ
- Superconducting energy gap versus pseudogap in hole-doped cuprates as revealed by infrared spectroscopy
- Growth and hole density control through equilibrium oxygen annealing of optimally doped Y1-xCaxBa2Cu3O7-δ single crystals
- Theory of superconducting and nonsuperconducting stripe phases in the hole-doped superconductor Ca{2-x}Na{x}CuO{2}Cl{2} (x=1/8,1/16)