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Direct correlation between T_(c) and CuO_(2) bilayer spacing in YBa_(2)Cu_(3)O_(7-x)



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Varela del Arco, María and Arias Serna, Diego and Sefrioui, Zouhair and León Yebra, Carlos and Ballesteros, C. and Pennycook, S. J. and Santamaría Sánchez-Barriga, Jacobo (2002) Direct correlation between T_(c) and CuO_(2) bilayer spacing in YBa_(2)Cu_(3)O_(7-x). Physical review B, 66 (13). ISSN 1098-0121


Official URL: http://dx.doi.org/10.1103/PhysRevB.66.134517



We report the effects of epitaxial strain and deoxygenation on high quality [YBa_(2)Cu_(3)O_(7-x)(YBCO)_(N) /PrBa_(2)Cu_(3)O_(7)(PBCO)_(5)]_(1000 Å) superlattices, with 1 < N < 12 unit cells. High-spatialresolution 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 CuO_(2) bilayers.

Item Type:Article
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© 2002 The American Physical Society. This work was supported by CICYT MAT2000-1468, Fundación Ramón Areces and CAM07N/0008/2001.

Uncontrolled Keywords:High-temperature superconductor; Charge-transfer; Transition-temperature; Grain-boundaries; Thin-films; Superlattices; Pressure; Dependence; Layers; Origin.
Subjects:Sciences > Physics > Electricity
Sciences > Physics > Electronics
ID Code:31023
Deposited On:24 Jun 2015 07:21
Last Modified:10 Dec 2018 14:58

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