Evolution of the pseudogap state in HTSC single crystals ReBa₂Cu₃O₇₋δ (Re=Y, Ho) doped with Al and Pr
Studied has been the effect of oxygen deficiency as well as of a low (up to 5 %) Al and Pr doping on conductivity in the basis plane of the ReBa₂Cu₃O₇₋δ (Re=Y, Ho) HTSC single crystals. The excess conductivity Δσ(T) of the studied samples has been found to show an exponential character in a wide tem...
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НТК «Інститут монокристалів» НАН України
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Цитувати: | Evolution of the pseudogap state in HTSC single crystals ReBa₂Cu₃O₇₋δ (Re=Y, Ho) doped with Al and Pr // R.V. Vovk, A.A. Zavgorodniy, M.A. Obolenskii, A.V. Samoilov, Y.V. Biletskiy, V.M. Pinto Simoes // Functional Materials. — 2009. — Т. 16, № 3. — С. 258-265. — Бібліогр.: 12 назв. — англ. |
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irk-123456789-1389062018-06-20T03:03:59Z Evolution of the pseudogap state in HTSC single crystals ReBa₂Cu₃O₇₋δ (Re=Y, Ho) doped with Al and Pr Vovk, R.V. Zavgorodniy, A.A. Obolenskii, M.A. Samoilov, A.V. Biletskiy, Y.V. Pinto Simoes, V.M. Characterization and properties Studied has been the effect of oxygen deficiency as well as of a low (up to 5 %) Al and Pr doping on conductivity in the basis plane of the ReBa₂Cu₃O₇₋δ (Re=Y, Ho) HTSC single crystals. The excess conductivity Δσ(T) of the studied samples has been found to show an exponential character in a wide temperature range Tf<T<T*. The description of the excess conductivity as Δσ~(1-T/T*)exp(Δ*ab/T) can be interpreted within the frames of medium field theory where T* is the mean field temperature of superconducting transition. The temperature dependence of the pseudogap can be satisfactorily described in terms of the BCS-BEC crossover theoretical model. The oxygen content reduction and a low Al doping results in widening of the temperature interval where the PG mode is realized, thus narrowing the area of linear ρ(Т) dependence in the ab plane. A low Pr doping concentrations (z≈0.05) results in an unusual effect of a significant narrowing of temperature interval where the PG is realised, thus extending the linear ρ(Т) region. Досліджено вплив кисневого дефіциту, а також слабкого (до 5 %) допування алюмінієм і празеодимом на провідність у базисній площині ВТНП-монокристалів ReBa₂Cu₃O₇₋δ (Re=Y, Но). Встановлено, що надлишкова провідність Δσ(T) зразків у широкому інтервалі температур Tf<T<T* підпорядковується експоненціальній температурній залежності. При цьому опис надлишкової провідності за допомогою співвідношення Δσ~(1-T/T*)exp(Δ*ab/T) може бути інтерпретований у термінах теорії середнього поля, де T* представлена, як середньо польова температура надпровідного переходу, а температурна залежність псевдощілини задовільно описується у рамках теорії кросовера БКШ-БЕК. Зниження вмісту кисню і слабке легування алюмінієм приводить до ефекту розширення температурного інтервалу реалізації ПЩ-режиму, тим самим звужуючи область лінійної залежності ρ(Т) в аЬ-площині. Допування монокристалів YBaCuO малими домішками празеодиму z≈0.05 приводить до незвичайного ефекту звуження температурного інтервалу реалізації ПЩ-режиму, подовжуючи лінійну ділянку залежності ρab(Т). Исследовано влияние кислородного дефицита, а также слабого (до 5 %) допирования алюминием и празеодимом на проводимость в базисной плоскости ВТСП-монокристаллов ReBa₂Cu₃O₇₋δ (Re=Y, Но). Установлено, что избыточная проводимость Δσ(T) образцов в широком интервале температур Tf<T<T* подчиняется экспоненциальной температурной зависимости. При этом описание :избыточной проводимости посредством соотношения Δσ~(1-T/T*)exp(Δ*ab/T) может быть интерпретировано в терминах теории среднего поля, где T* представлена как среднеполевая температура сверхпроводящего перехода, а температурная зависимость псевдощели удовлетворительно описывается в рамках теории кроссовера БКШ-БЭК. Понижение содержания кислорода и слабое легирование алюминием приводит к эффекту расширения температурного интервала реализации ПЩ-режима, тем самым сужая область линейной зависимости ρ(Т) в аЬ-плоскост: и. Допирование монокристаллов YBaCuO малыми добавками празеодима z≈0.05 приводит к необычному эффекту сужения температурного интервала реализации ПЩ-режима, тем самым удлиняя линейный участок зависимости ρab(Т). 2009 Article Evolution of the pseudogap state in HTSC single crystals ReBa₂Cu₃O₇₋δ (Re=Y, Ho) doped with Al and Pr // R.V. Vovk, A.A. Zavgorodniy, M.A. Obolenskii, A.V. Samoilov, Y.V. Biletskiy, V.M. Pinto Simoes // Functional Materials. — 2009. — Т. 16, № 3. — С. 258-265. — Бібліогр.: 12 назв. — англ. 1027-5495 http://dspace.nbuv.gov.ua/handle/123456789/138906 en Functional Materials НТК «Інститут монокристалів» НАН України |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
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topic |
Characterization and properties Characterization and properties |
spellingShingle |
Characterization and properties Characterization and properties Vovk, R.V. Zavgorodniy, A.A. Obolenskii, M.A. Samoilov, A.V. Biletskiy, Y.V. Pinto Simoes, V.M. Evolution of the pseudogap state in HTSC single crystals ReBa₂Cu₃O₇₋δ (Re=Y, Ho) doped with Al and Pr Functional Materials |
description |
Studied has been the effect of oxygen deficiency as well as of a low (up to 5 %) Al and Pr doping on conductivity in the basis plane of the ReBa₂Cu₃O₇₋δ (Re=Y, Ho) HTSC single crystals. The excess conductivity Δσ(T) of the studied samples has been found to show an exponential character in a wide temperature range Tf<T<T*. The description of the excess conductivity as Δσ~(1-T/T*)exp(Δ*ab/T) can be interpreted within the frames of medium field theory where T* is the mean field temperature of superconducting transition. The temperature dependence of the pseudogap can be satisfactorily described in terms of the BCS-BEC crossover theoretical model. The oxygen content reduction and a low Al doping results in widening of the temperature interval where the PG mode is realized, thus narrowing the area of linear ρ(Т) dependence in the ab plane. A low Pr doping concentrations (z≈0.05) results in an unusual effect of a significant narrowing of temperature interval where the PG is realised, thus extending the linear ρ(Т) region. |
format |
Article |
author |
Vovk, R.V. Zavgorodniy, A.A. Obolenskii, M.A. Samoilov, A.V. Biletskiy, Y.V. Pinto Simoes, V.M. |
author_facet |
Vovk, R.V. Zavgorodniy, A.A. Obolenskii, M.A. Samoilov, A.V. Biletskiy, Y.V. Pinto Simoes, V.M. |
author_sort |
Vovk, R.V. |
title |
Evolution of the pseudogap state in HTSC single crystals ReBa₂Cu₃O₇₋δ (Re=Y, Ho) doped with Al and Pr |
title_short |
Evolution of the pseudogap state in HTSC single crystals ReBa₂Cu₃O₇₋δ (Re=Y, Ho) doped with Al and Pr |
title_full |
Evolution of the pseudogap state in HTSC single crystals ReBa₂Cu₃O₇₋δ (Re=Y, Ho) doped with Al and Pr |
title_fullStr |
Evolution of the pseudogap state in HTSC single crystals ReBa₂Cu₃O₇₋δ (Re=Y, Ho) doped with Al and Pr |
title_full_unstemmed |
Evolution of the pseudogap state in HTSC single crystals ReBa₂Cu₃O₇₋δ (Re=Y, Ho) doped with Al and Pr |
title_sort |
evolution of the pseudogap state in htsc single crystals reba₂cu₃o₇₋δ (re=y, ho) doped with al and pr |
publisher |
НТК «Інститут монокристалів» НАН України |
publishDate |
2009 |
topic_facet |
Characterization and properties |
url |
http://dspace.nbuv.gov.ua/handle/123456789/138906 |
citation_txt |
Evolution of the pseudogap state in HTSC single crystals ReBa₂Cu₃O₇₋δ (Re=Y, Ho) doped with Al and Pr // R.V. Vovk, A.A. Zavgorodniy, M.A. Obolenskii, A.V. Samoilov, Y.V. Biletskiy, V.M. Pinto Simoes // Functional Materials. — 2009. — Т. 16, № 3. — С. 258-265. — Бібліогр.: 12 назв. — англ. |
series |
Functional Materials |
work_keys_str_mv |
AT vovkrv evolutionofthepseudogapstateinhtscsinglecrystalsreba2cu3o7dreyhodopedwithalandpr AT zavgorodniyaa evolutionofthepseudogapstateinhtscsinglecrystalsreba2cu3o7dreyhodopedwithalandpr AT obolenskiima evolutionofthepseudogapstateinhtscsinglecrystalsreba2cu3o7dreyhodopedwithalandpr AT samoilovav evolutionofthepseudogapstateinhtscsinglecrystalsreba2cu3o7dreyhodopedwithalandpr AT biletskiyyv evolutionofthepseudogapstateinhtscsinglecrystalsreba2cu3o7dreyhodopedwithalandpr AT pintosimoesvm evolutionofthepseudogapstateinhtscsinglecrystalsreba2cu3o7dreyhodopedwithalandpr |
first_indexed |
2025-07-10T06:48:45Z |
last_indexed |
2025-07-10T06:48:45Z |
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1837241605792202752 |
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