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Flux line lattice state versus magnetism in electron-doped cuprate superconductor Sr {1-x}La {x}CuO {2} by Satoh, Kohki H.; Takeshita, Soshi; Koda, Akihiro; Kadono, Ryosuke; Ishida, Kenji; Pyon, Sunsen; Sasagawa, Takao; Takagi, Hidenori is a scholarly article available to read on EtoBox.

What is Flux line lattice state versus magnetism in electron-doped cuprate superconductor Sr {1-x}La {x}CuO {2} about?

The microscopic details of flux line lattice state studied by muon spin rotation is reported in an electron-doped high-$T_{\rm c}$ cuprate superconductor, Sr$_{1-x}$La$_{x}$CuO$_{2}$ (SLCO, $x=0.10$--0.15). A clear sign of phase separation between magnetic and non-magnetic phases is observed, where the effective magnetic penetration depth [$\lambda\equiv\lambda(T,H)$] is determined selectively for the latter phase. The extremely small value of $\lambda(0,0)$ %versus $T_{\rm c}$ and corresponding large superfluid density ($n_s \propto \lambda^{-2}$) is consistent with presence of a large Fermi surface with carrier density of $1+x$, which suggests the breakdown of the "doped Mott insulator" even at the "optimal doping" in SLCO. Moreover, a relatively weak anisotropy in the superconducting order parameter is suggested by the field dependence of $\lambda(0,H)$. These observations strongly suggest that the superconductivity in SLCO is of a different class from hole-doped cuprates.

Author

Satoh, Kohki H.; Takeshita, Soshi; Koda, Akihiro; Kadono, Ryosuke; Ishida, Kenji; Pyon, Sunsen; Sasagawa, Takao; Takagi, Hidenori

Published

2007

Language

EN