Absence of Static Phase Separation in the High Tc Cuprate YBa2Cu3O6+y

J. Bobroff; H. Alloul; S. Ouazi; P. Mendels; A. Mahajan; N. Blanchard; G. Collin; V. Guillen; J.-F. Marucco

doi:10.1103/PhysRevLett.89.157002

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Absence of Static Phase Separation in the High Tc Cuprate YBa2Cu3O6+y

J. Bobroff, H. Alloul, S. Ouazi, P. Mendels, A. Mahajan, N. Blanchard, G. Collin, V. Guillen, J.-F. Marucco

DOI 10.1103/PhysRevLett.89.157002 · Physical Review Letters

T1

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Abstract

We use Y89 NMR in YBa2Cu3O6+y in order to evaluate with high sensitivity the distribution of hole content p in the CuO2 planes. For y=1 and y=0.6, this hole doping distribution is found narrow with a full width at half maximum smaller than Δp=0.025. This rules out any large static phase separation between underdoped and optimally doped regions in contrast with the one observed by STM in Bi2212 and by NQR in LaSrCuO. This establishes that static electronic phase separation is not a generic feature of the cuprates.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O6+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	89.1	Pressure not reported	unknown
YBa2Cu3O6+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	92.5	Pressure not reported	unknown
YBa2Cu3O6+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	55.8	Pressure not reported	unknown