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Effect of high pressure on conductivity in the basal plane of Y₁₋xPrxBa₂Cu₃O₇₋δ single crystals lightly doped of praseodymium

Effect of high pressure on conductivity in the basal plane of Y₁₋xPrxBa₂Cu₃O₇₋δ single crystals lightly doped of praseodymium

Effect of high hydrostatic pressure up to 17 kbar on conductivity of lightly Pr-doped Y₁₋xPrxBa₂Cu₃O₇₋δ (x~0.05) single crystals is investigated. We show that in contrast to non-doped YBa2Cu3O7-δ samples, application of the high pressure leads to a substantial increase of the pressure derivative of...

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Main Authors: Khadzhai, G.Ya., Vovk, N.R., Vovk, R.V., Savich, S.V., Kislitsa, M., Kotvitskaya, K.A., Morozov, V.S., Leniv, J.G., Timofeev, S.S.
Format: Article
Language:English
Published: 2014
Series:Functional Materials
Subjects:
Characterization and properties
Online Access:http://dspace.nbuv.gov.ua/handle/123456789/119112
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spelling irk-123456789-1191122017-06-05T03:03:43Z Effect of high pressure on conductivity in the basal plane of Y₁₋xPrxBa₂Cu₃O₇₋δ single crystals lightly doped of praseodymium Khadzhai, G.Ya. Vovk, N.R. Vovk, R.V. Savich, S.V. Kislitsa, M. Kotvitskaya, K.A. Morozov, V.S. Leniv, J.G. Timofeev, S.S. Characterization and properties Effect of high hydrostatic pressure up to 17 kbar on conductivity of lightly Pr-doped Y₁₋xPrxBa₂Cu₃O₇₋δ (x~0.05) single crystals is investigated. We show that in contrast to non-doped YBa2Cu3O7-δ samples, application of the high pressure leads to a substantial increase of the pressure derivative of the coherence length dξc/dP and temperature shift of 2D-3D crossover point. Possible mechanisms of the influence of the high pressure on the critical temperature and the coherence length are discussed within the frames of a model assuming the presence of singularities in the charge carriers electron spectrum typical for lattices with strong coupling. The excess conductivity Δ σ(T) inY₀.₉₅xPr₀Ba₂Cu₃O₇₋δ has beenY0.95Pr0.05Ba2Cu3O7-δ revealed to obey an exponential dependence in the wide temperature range Tf < T < T*. At this, description of the excess conductivity by the expression Δ σ ~ (1 - T/T*)exp(Δ*ab/T) can be interpreted in terms of the mean-field theory, where T* is the mean-field superconducting transition temperature and pseudogap temperature dependence is satisfactory described within the framework of the BCS-BEC crossover theory. An increase of the applied pressure leads to narrowing of the temperature range of realization of the pseudogap regime, thereby expanding the linear temperature dependence of the basal-plane resistivity ρab(T). 2014 Article Effect of high pressure on conductivity in the basal plane of Y₁₋xPrxBa₂Cu₃O₇₋δ single crystals lightly doped of praseodymium / G.Ya.Khadzhai, N.R.Vovk, R.V.Vovk, S.V.Savich, M.Kislitsa, K.A.Kotvitskaya, V.S.Morozov, J.G.Leniv, S.S.Timofeev // Functional Materials. — 2015. — Т. 22, № 1. — С. 05-13. — Бібліогр.: 55 назв. — англ. 1027-5495 DOI: dx.doi.org/10.15407/fm22.01.005 http://dspace.nbuv.gov.ua/handle/123456789/119112 en Functional Materials
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
topic Characterization and properties
Characterization and properties
spellingShingle Characterization and properties
Characterization and properties
Khadzhai, G.Ya.
Vovk, N.R.
Vovk, R.V.
Savich, S.V.
Kislitsa, M.
Kotvitskaya, K.A.
Morozov, V.S.
Leniv, J.G.
Timofeev, S.S.
Effect of high pressure on conductivity in the basal plane of Y₁₋xPrxBa₂Cu₃O₇₋δ single crystals lightly doped of praseodymium
Functional Materials
description Effect of high hydrostatic pressure up to 17 kbar on conductivity of lightly Pr-doped Y₁₋xPrxBa₂Cu₃O₇₋δ (x~0.05) single crystals is investigated. We show that in contrast to non-doped YBa2Cu3O7-δ samples, application of the high pressure leads to a substantial increase of the pressure derivative of the coherence length dξc/dP and temperature shift of 2D-3D crossover point. Possible mechanisms of the influence of the high pressure on the critical temperature and the coherence length are discussed within the frames of a model assuming the presence of singularities in the charge carriers electron spectrum typical for lattices with strong coupling. The excess conductivity Δ σ(T) inY₀.₉₅xPr₀Ba₂Cu₃O₇₋δ has beenY0.95Pr0.05Ba2Cu3O7-δ revealed to obey an exponential dependence in the wide temperature range Tf < T < T*. At this, description of the excess conductivity by the expression Δ σ ~ (1 - T/T*)exp(Δ*ab/T) can be interpreted in terms of the mean-field theory, where T* is the mean-field superconducting transition temperature and pseudogap temperature dependence is satisfactory described within the framework of the BCS-BEC crossover theory. An increase of the applied pressure leads to narrowing of the temperature range of realization of the pseudogap regime, thereby expanding the linear temperature dependence of the basal-plane resistivity ρab(T).
format Article
author Khadzhai, G.Ya.
Vovk, N.R.
Vovk, R.V.
Savich, S.V.
Kislitsa, M.
Kotvitskaya, K.A.
Morozov, V.S.
Leniv, J.G.
Timofeev, S.S.
author_facet Khadzhai, G.Ya.
Vovk, N.R.
Vovk, R.V.
Savich, S.V.
Kislitsa, M.
Kotvitskaya, K.A.
Morozov, V.S.
Leniv, J.G.
Timofeev, S.S.
author_sort Khadzhai, G.Ya.
title Effect of high pressure on conductivity in the basal plane of Y₁₋xPrxBa₂Cu₃O₇₋δ single crystals lightly doped of praseodymium
title_short Effect of high pressure on conductivity in the basal plane of Y₁₋xPrxBa₂Cu₃O₇₋δ single crystals lightly doped of praseodymium
title_full Effect of high pressure on conductivity in the basal plane of Y₁₋xPrxBa₂Cu₃O₇₋δ single crystals lightly doped of praseodymium
title_fullStr Effect of high pressure on conductivity in the basal plane of Y₁₋xPrxBa₂Cu₃O₇₋δ single crystals lightly doped of praseodymium
title_full_unstemmed Effect of high pressure on conductivity in the basal plane of Y₁₋xPrxBa₂Cu₃O₇₋δ single crystals lightly doped of praseodymium
title_sort effect of high pressure on conductivity in the basal plane of y₁₋xprxba₂cu₃o₇₋δ single crystals lightly doped of praseodymium
publishDate 2014
topic_facet Characterization and properties
url http://dspace.nbuv.gov.ua/handle/123456789/119112
citation_txt Effect of high pressure on conductivity in the basal plane of Y₁₋xPrxBa₂Cu₃O₇₋δ single crystals lightly doped of praseodymium / G.Ya.Khadzhai, N.R.Vovk, R.V.Vovk, S.V.Savich, M.Kislitsa, K.A.Kotvitskaya, V.S.Morozov, J.G.Leniv, S.S.Timofeev // Functional Materials. — 2015. — Т. 22, № 1. — С. 05-13. — Бібліогр.: 55 назв. — англ.
series Functional Materials
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last_indexed 2023-10-18T20:31:33Z
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