Effect of Oxygen Redistribution on Temperature Dependence of Pseudo-Gap in Underdoped HoBa2Cu3O7-δSingle Crystals

Вовк, Р. В.; Nazyrov, Z. F.; Obolenskii, M. A.; Simoes, V. M. Pinto; Januszczyk, M.; Latosińska, J.N.

doi:10.12693/aphyspola.120.512

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…С этой точки зрения соединение YBa 2 Cu 3 O 7−δ (YBCO) привлекательно возможностью широкого варьирования состава методом замены иттрия его изоэлектронными аналогами, или изменением степени кислородной нестехиометрии. Отметим, что иттрий в составе YBCO легко замещается большинством лантанидов и другими элементами [1,[21][22][23][24][25][26][27][28][29][30], что обычно не приводит к ухудшению СП свойств исходного состава. Исключение составляет празеодим, т. к. PrBCO -диэлектрик [31,32].…”

Section: Introductionunclassified

Анализ флуктуационной проводимости в Y-=SUB=-0.5-=/SUB=-Cd-=SUB=-0.5-=/SUB=-Ba-=SUB=-2-=/SUB=-Cu-=SUB=-3-=/SUB=-O-=SUB=-7-delta-=/SUB=-

Алиев¹,

Исаков²,

Рагимов³

et al. 2023

Физика Твердого Тела

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A study was made of the influence of substitution of up to 50% of yttrium for cadmium in YBa 2 Cu 3 O 7-δ polycrystals on the mechanism of formation of excess conductivity. It has been established that such a substitution led to a significant increase in the resistivity of Y 0,5 Cd 0,5 Ba 2 Cu 3 O 7-δ , and the value of the critical transition temperature Tc to the superconducting state decreases. The mechanism of formation of fluctuation conductivity (T) near Tc is considered within the framework of the Aslamazov-Larkin theory. The Ginzburg temperature, the critical temperature in the mean field approximation, and the 3D-2D crossover temperature were determined. It is shown that the doping of YBa 2 Cu 3 O 7-δ with cadmium leads to an increase in the coherence length along the c axis by a factor of 3.2. An analysis of the excess conductivity of the Y 0,5 Cd 0,5 Ba 2 Cu 3 O 7-δ sample within the framework of the local pair model made it possible to determine the temperature dependences of the pseudogap and its maximum value.

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Section: Introductionunclassified

Анализ флуктуационной проводимости в Y-=SUB=-0.5-=/SUB=-Cd-=SUB=-0.5-=/SUB=-Ba-=SUB=-2-=/SUB=-Cu-=SUB=-3-=/SUB=-O-=SUB=-7-delta-=/SUB=-

Алиев¹,

Исаков²,

Рагимов³

et al. 2023

Физика Твердого Тела

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“…From this point of view, the compound YBa 2 Cu 3 O 7−δ (YBCO) is attractive due to the opportunity of wide variation of the composition by replacing yttrium with its isoelectronic analogs, or by changing the degree of oxygen nonstoichiometry. Note that yttrium in the composition of YBCO is easily replaced by most lanthanides and other elements [1,[21][22][23][24][25][26][27][28][29][30], which usually does not lead to deterioration of the SP properties of the initial composition. The exception is praseodymium, t. k. PrBCOdielectric [31,32].…”

Section: Introductionmentioning

confidence: 99%

Analysis of fluctuation conductivity in Y-=SUB=-0.5-=/SUB=-Cd-=SUB=-0.5-=/SUB=-Ba-=SUB=-2-=/SUB=-Cu-=SUB=-3-=/SUB=-O-=SUB=-7-delta-=/SUB=-

Isakov

Ragimov

et al. 2023

Physics of the Solid State

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A study was made of the influence of substitution of up to 50% of yttrium for cadmium in YBa2Cu3O7-delta polycrystals on the mechanism of formation of excess conductivity. It has been established that such a substitution led to a significant increase in the resistivity of Y0.5Cd0.5Ba2Cu3O7-delta, and the value of the critical transition temperature Tc to the superconducting state decreases. The mechanism of formation of fluctuation conductivity (T) near Tc is considered within the framework of the Aslamazov-Larkin theory. The Ginzburg temperature, the critical temperature in the mean field approximation, and the 3D-2D crossover temperature were determined. It is shown that the doping of YBa YBa2Cu3O7-delta with cadmium leads to an increase in the coherence length along the c axis by a factor of 3.2. An analysis of the excess conductivity of the Y0.5Cd0.5Ba2Cu3O7-delta sample within the framework of the local pair model made it possible to determine the temperature dependences of the pseudogap and its maximum value. Keywords: superconductivity, fluctuation conductivity, pseudo-gap, coherence length.

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Electric transport and the pseudogap in the 1-2-3 HTSC system, under all-around compression (Review Article)

Вовк

Solovjov

2018

Low Temperature Physics

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The problem of how high pressure impacts various electric transport mechanisms in HTSC compounds REBa2Cu3O7-δ (RE = Y, or another rare-earth ion) is considered. The features of the crystal structure and the effects that structural defects of different morphologies have on the electrical conductivity of these compounds in the normal, pseudogap, and superconducting states, are discussed. A review of the experimental data obtained in studies on the effect of high hydrostatic pressure on the various electric transport mechanisms of REBa2Cu3O7-δ compounds, with varying composition and technical prehistory, is conducted. Different theoretical models devoted to the subject of how high pressure impacts the electrical conductivity of 1-2-3 HTSC system compounds are discussed.

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Effect of Oxygen Redistribution on Temperature Dependence of Pseudo-Gap in Underdoped HoBa₂Cu₃O_7-δSingle Crystals

Cited by 4 publications

References 12 publications

Анализ флуктуационной проводимости в Y-=SUB=-0.5-=/SUB=-Cd-=SUB=-0.5-=/SUB=-Ba-=SUB=-2-=/SUB=-Cu-=SUB=-3-=/SUB=-O-=SUB=-7-delta-=/SUB=-

Анализ флуктуационной проводимости в Y-=SUB=-0.5-=/SUB=-Cd-=SUB=-0.5-=/SUB=-Ba-=SUB=-2-=/SUB=-Cu-=SUB=-3-=/SUB=-O-=SUB=-7-delta-=/SUB=-

Analysis of fluctuation conductivity in Y-=SUB=-0.5-=/SUB=-Cd-=SUB=-0.5-=/SUB=-Ba-=SUB=-2-=/SUB=-Cu-=SUB=-3-=/SUB=-O-=SUB=-7-delta-=/SUB=-

Electric transport and the pseudogap in the 1-2-3 HTSC system, under all-around compression (Review Article)

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