Journal
PHYSICAL REVIEW B
Volume 66, Issue 13, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevB.66.134517
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We report the effects of epitaxial strain and deoxygenation on high quality [YBa2Cu3O7-x(YBCO)(N)/PrBa2Cu3O7(PBCO)(5)](1000 Angstrom) superlattices, with 1 < N < 12 unit cells. High-spatial-resolution electron energy loss spectroscopy shows that strained, fully oxygenated YBCO layers are underdoped. Irrespective of whether underdoping is induced by strain or deoxygenation, x-ray diffraction analysis shows that T-c correlates directly with separation of the CuO2 bilayers.
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