Magic Doping Fractions in High-Temperature Superconductors

Details Magic Doping Fractions in High-Temperature Superconductors Magic Doping Fractions in High-Temperature Superconductors

2004-08-23

arxiv.org/abs/cond-mat/0408483v2

Phys. Rev. Lett. 94, 207004 (2005).

Physics

Condensed Matter

Superconductivity

5 pages, 3 figure, resubmitted to Phys. Rev. Lett. The Tc vs. x diagram has been added and the discussions have been modified

Scientific paper

10.1103/PhysRevLett.94.207004

We report hole-doping dependence of the in-plane resistivity \rho_{ab} in a cuprate superconductor La_{2-x}Sr_{x}CuO_{4}, carefully examined using a series of high-quality single crystals. Our detailed measurements find a tendency towards charge ordering at particular rational hole doping fractions of 1/16, 3/32, 1/8, and 3/16. This observation appears to suggest a specific form of charge order and is most consistent with the recent theoretical prediction of the checkerboard-type ordering of the Cooper pairs at rational doping fractions x = (2m+1)/2^n, with integers m and n.

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