Absence of static phase separation in the high-Tc cuprate $YBa_{2}Cu_{3}O_{6+y}$

Details Absence of static phase separation in the high-Tc cuprate $YBa_{2}Cu_{3}O_{6+y}$ Absence of static phase separation in the high-Tc cuprate $YBa_{2}Cu_{3}O_{6+y}$

2002-03-11

arxiv.org/abs/cond-mat/0203225v2

Phys.Rev.Lett. 89, 157002 (2002)

Physics

Condensed Matter

Superconductivity

published in Phys.Rev.Lett. 89, 157002 (2002) (only minor changes as compared to previous version) Article of 4 pages + 3 figu

Scientific paper

10.1103/PhysRevLett.89.157002

We use 89Y NMR in $YBa_{2}Cu_{3}O_{6+y}$ 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 Delta p=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.

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