Line Plot from Scientific Research

Schematic of the phase diagram 32 of Sr 14 Cu 24 O 41 . This compound is naturally self-doped, with most holes localized in the chains and a residual hole density of p = 0.06 in the ladders. Isovalent Ca substitution at the Sr sites transfers holes from the chains to the ladders, increasing the ladder hole density. On doping, the ladders transition from a charge-ordered phase to a gapped spin liquid phase.

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