Li, Pengcheng ; Mandal, Soumen ; Budhani, R. C. ; Greene, R. L. (2007) Correlation between incoherent phase fluctuations and disorder in Y1-xPrxBa2Cu3O7-δ epitaxial films from Nernst effect measurements Physical Review B, 75 (18). 184509_1-184509 _5. ISSN 0163-1829
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Official URL: http://prb.aps.org/abstract/PRB/v75/i18/e184509
Related URL: http://dx.doi.org/10.1103/PhysRevB.75.184509
Abstract
Measurements of Nernst effect, resistivity and Hall angle on epitaxial films of Y1-xPrxBa2Cu3O7-δ (Pr-YBCO, 0δxδ0.4) are reported over a broad range of temperature and magnetic-field strength. While the hall and resistivity data suggest a broad pseudogap regime in accordance with earlier results, these first measurements of the nernst effect on Pr-YBCO show a large signal above the superconducting transition temperature (Tc). This effect is attributed to vortexlike excitations in the phase incoherent condensate existing above Tc. A correlation between disorder and the width of the phase fluctuation regime has been established for the γBCO family of cuprates, which suggests a Tc≈110 k for disorder-free YBa2Cu3O7-δ
Item Type: | Article |
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Source: | Copyright of this article belongs to American Physical Society. |
ID Code: | 5519 |
Deposited On: | 19 Oct 2010 12:02 |
Last Modified: | 16 May 2016 16:00 |
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