Role of oxygen in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">PrBa</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org

López-Morales, M.E.; Rı́os-Jara, D.; Tagüea, J.; Escudero, R.; Placa, S. La; Bezinge, A.; Lee, V. Y.; Engler, E. M.; Grant, P. M.

doi:10.1103/physrevb.41.6655

Cited by 170 publications

(34 citation statements)

References 42 publications

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“…YBCO and PBCO materials have a similar crystal structure, a similar effect of oxygen on the structural ortho-tetra phase transition, etc. [17]. Thus, the boundary resistance Rb between the YBCO and PBCO layers is expected to be in the same range Rb~<3-7× 10 -9 ~cm 2.…”

Section: Characterization Of the Ybco/pbco/ybco Ramp Junctionsmentioning

confidence: 99%

Transport processes in YBa2Cu3Ox/PrBa2Cu3Ox/YBa2Cu3Ox ramp type Josephson junctions

Boguslavskij

Gao

Rijnders

et al. 1992

Physica C: Superconductivity

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A study of the YBCO/PBCO/YBCO ramp junctions with and without PBCO barrier shows that the Josephson and normal state behavior of these structures are determined by the thickness of the PBCO barrier and its nature. The boundary resistance and depression of the YBCO superconducting parameters near the interface do not strongly affect the junction characteristic. For thicknesses of 8 to 20 nm of the PBCO barrier the Josephson coupling is established through the high resistive barrier and the behavior of the junctions is better described by a SNINS model than by a SNS weak link model. Proximity effect, resonant tunneling and strong pair breaking mechanisms are discussed to explain the experimental characteristics. Good agreement with the experimental dependence of the IcR, product on the temperature and on the PBCO barrier thickness was obtained ifa strong pair breaking mechanisms in the barrier is taken into account.

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Section: Characterization Of the Ybco/pbco/ybco Ramp Junctionsmentioning

confidence: 99%

Transport processes in YBa2Cu3Ox/PrBa2Cu3Ox/YBa2Cu3Ox ramp type Josephson junctions

Boguslavskij

Gao

Rijnders

et al. 1992

Physica C: Superconductivity

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“…This approach implies that the suppression of superconductivity results from a reduced number of charge carriers in the CuO 2 planes. Magnetic susceptibility, 6,8,12 Hall effect, 8 thermopower, 7,9,10 nuclear magnetic resonance, 15 muon-spin relaxation, 16 and neutron diffraction measurements [22][23][24] have been interpreted in terms of hole depletion. On closer inspection, however, it has been shown that these results can also be understood as an indication for Pr 3ϩ .…”

Section: Introductionmentioning

confidence: 99%

X-ray absorption spectroscopy of detwinnedPrxY1−

et al. 1997

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UvA-DARE is a service provided by the library of the University of Amsterdam (http://dare.uva.nl) UvA-DARE (Digital Academic Repository)X-ray absorption spectroscopy of detwinned PrxY1-xBa2Cu3O7-y single crystals: electronic structure and hole distribution Merz, M.; Nücker, N.; Pellegrin, E.; Schweiss, P.; Schuppler, S.; Kielwein, M.; Knupfer, M.; Golden, M.S.; Fink, J. General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Substituting Y in orthorhombic ͑Y,R)Ba 2 Cu 3 O 7 by any rare-earth element R has generally little effect on the superconducting properties. For RϭPr, however, superconductivity is completely suppressed. To understand this effect we have studied the unoccupied electronic structure of Pr x Y 1Ϫx Ba 2 Cu 3 O 7Ϫy (xϭ0.0, 0.4, 0.8) using polarization-dependent O 1s near-edge x-ray absorption spectroscopy of detwinned single crystals. We identify the hole states in the CuO 2 planes and the CuO 3 chains and give estimates of the relative contributions of the O 2p x , O 2p y , and O 2p z orbitals to these states. Along with the comparison of oxygen-rich (yϷ0.1) to the oxygen-depleted materials (yϷ0.9), this allows a test of the current theoretical explanations for the Pr-induced suppression of superconductivity. While we can rule out models involving hole filling or charge transfer between the planes and the chains, our data are consistent with approaches based on Pr 4f -O 2p hybridization. ͓S0163-1829͑97͒03313-4͔

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“…In these studies, the hybridization of the Pr-4f levels with the Cu-O plane bands was instead postulated as a cause for the suppression of the superconducting state, but questions remained because some of these studies did show some features that could not be explained on the basis of solely trivalent Pr [3]. Furthermore, other studies, such as neutron diffraction, did indicate an intermediate valent Pr [4].…”

Section: Prba2cu3ot_y Investigated By 141prmentioning

confidence: 96%

PrBa2Cu3O7−y investigated by141Pr Mössbauer spectroscopy

et al. 1994

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Role of oxygen inPrBa2Cu3
M.E. López-Morales
¹
,
D. Rı́os-Jara
²
,
J. Tagüea
³

et al.

Cited by 170 publications

References 42 publications

Transport processes in YBa2Cu3Ox/PrBa2Cu3Ox/YBa2Cu3Ox ramp type Josephson junctions

Transport processes in YBa2Cu3Ox/PrBa2Cu3Ox/YBa2Cu3Ox ramp type Josephson junctions

X-ray absorption spectroscopy of detwinnedPrxY1−

PrBa2Cu3O7−y investigated by141Pr Mössbauer spectroscopy

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Role of oxygen inPrBa2Cu3M.E. López-Morales1, D. Rı́os-Jara2, J. Tagüea3 et al.

Cited by 170 publications

References 42 publications

Transport processes in YBa2Cu3Ox/PrBa2Cu3Ox/YBa2Cu3Ox ramp type Josephson junctions

Transport processes in YBa2Cu3Ox/PrBa2Cu3Ox/YBa2Cu3Ox ramp type Josephson junctions

X-ray absorption spectroscopy of detwinnedPrxY1−

PrBa2Cu3O7−y investigated by141Pr Mössbauer spectroscopy

Contact Info

Product

Resources

About

Role of oxygen inPrBa2Cu3
M.E. López-Morales
¹
,
D. Rı́os-Jara
²
,
J. Tagüea
³

et al.