Robust intrinsic electronic superconducting phases in underdoped La_{2-x}Sr_xCuO4 single crystals

Details Robust intrinsic electronic superconducting phases in underdoped La_{2-x}Sr_xCuO4 single crystals Robust intrinsic electronic superconducting phases in underdoped La_{2-x}Sr_xCuO4 single crystals

2006-10-31

arxiv.org/abs/cond-mat/0610864v1

Solid State Communications,Vol 145/4 pp 173-177 (2008)

Physics

Condensed Matter

Superconductivity

17 pages, 4 figures, submitted to Phys. Rev. Lett

Scientific paper

We have measured the superconducting critical temperature (Tc) and the diamagnetic susceptibility of La2-xSrxCuO4 single crystals in various magnetic fields. We observed a field-induced evolution from an apparent Tc phase to an intrinsic Tc1 = 15 K or Tc2 = 30 K phase characterized by "magic" hole concentration which is commensurate with that of a two dimensional electronic lattice. The onset Tc of the intrinsic superconducting phases remains robust up to H = 5 Tesla. We suggest that the intrinsic superconducting phases at "magic" doping concentrations are the pristine electronic phases of high temperature superconductivity.

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