Under-doped La2-xSrxCuO4 with x = 0.063 - 0.125: TSFZ growth of high-quality crystals and anomalous doping dependences of superconducting properties

Abstract

A series of high-quality La2-xSrxCuO4 (LSCO) superconductor crystals in the under-doping region with x = 0.063, 0.07, 0.09, 0.10, 0.111 and 0.125 has been successfully prepared by traveling-solvent floating-zone (TSFZ) technique. The crystals are large and free of sub-grains and foreign phases. The high crystal quality has been revealed by double-crystal x-ray rocking curves and Rutherford backscattering spectrometry combined with ion-beam channeling effect. We find that the evolutions of the superconducting transition width and volume fraction as a function of carrier concentration exhibit interesting anomalies in the vicinity of some magic number doping levels such as x =1/4^2 (=0.0625) and 1/3^2 (=0.111). We argue that these behaviours are of intrinsic electronic origin.

arXiv comment4 pages, 4 figures, to be published on Superconductor Science and Technology

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Cited by in corpus (10)

• Multiple Bosonic Mode Coupling in Electron Self-Energy of (La_2-xSr_x)CuO_4
• The Dichotomy between Nodal and Antinodal Quasiparticles in Underdoped (La${}_{2-x}$Sr${}_x$)CuO${}_4$ Superconductors
• Distinct Pairing Symmetries in $N{d}_{1.85}C{e}_{0.15}Cu{O}_{4-y}$ and $L{a}_{1.89}S{r}_{0.11}Cu{O}_4$ Single Crystals: Evidence from Comparative Tunnelling Measurements
• Doping dependence of the $(\pi ,\pi )$ shadow band in La-based cuprates studied by angle-resolved photoemission spectroscopy
• The composite picture of the charge carriers in La2-xSrxCuO4 (0.063 < x < 0.11) superconductors
• Charge Ordered RVB States in the Doped Cuprates
• Anomalous superconducting properties at magic doping levels in under-doped La2-xSrxCuO4 single crystals
• Robust intrinsic electronic superconducting phases in underdoped La_{2-x}Sr_xCuO4 single crystals
• Evidence of Coherent C-Axis Charge Transport in Underdoped La2-xSrxCuO4 Superconductors
• Manipulating vortex motion by thermal and Lorentz force in high temperature superconductors