Effect of electron irradiation on the fluctuation conductivity in YBa2Cu3O7−δ single crystals

Khadzhai, G. Ya.; Litvinov, Yu. V.; Вовк, Р. В.; Zdorovko, S. F.; Goulatis, Ι. L.; Chroneos, Alexander

doi:10.1007/s10854-018-8768-y

Cited by 12 publications

(3 citation statements)

References 41 publications

(60 reference statements)

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“…Previously, we investigated [45,46] the influence of irradiation with high-energy electrons on the excess conductivity in the basal plane of optimally doped YBCO single crystals with T c = 91.74 K and observed an essential increase of the electrical resistivity in the temperature range T c -300 K. The increase of the resistivity was accompanied by an increase of the coherence length nc(0) by more than a factor of 1.4. In this work, we compare the effects of electron irradiation with the influence of Pr doping and oxygen deficiency on the fluctuation conductivity and characteristics of the superconducting state in YBa 2 Cu 3-O 7-d and Y 1-z Pr z Ba 2 Cu 3 O 7-d single crystals.…”

Section: Introductionmentioning

confidence: 98%

“…Irradiation of the samples with electrons at 0.5-2.5 meV energies was done at T \ 10 K in a special helium cryostat with a beamline inlet. The irradiation dose D = 10 18 cm -2 corresponds to an averaged overall sublattices concentration of defects of 10 -4 displacements per atom [45,46]. All resistance measurements were done at a fixed temperature.…”

Section: Introductionmentioning

confidence: 99%

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Composition variation and electron irradiation effects on the fluctuation conductivity in Y1–zPrzBa2Cu3O7−δ single crystals

Chroneos

Kolesnikov

Taranova

et al. 2020

J Mater Sci: Mater Electron

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A comparative analysis of the changes in the fluctuation conductivity and characteristics of the superconducting state of YBa2Cu3O7–δ single crystals caused by various types of defects is carried out. These defects appeared due to irradiation with high-energy electrons (radiation doses from 1.4 to 8.8 1018 cm–2), changes in oxygen deficiency (0.08 ≤ δ ≤ 0.23) due to annealing at different temperatures, or doping with praseodymium (Y1–zPrzBa2Cu3O7−δ, 0 ≤ z ≤ 0.5 at optimal oxygen concentration). It is shown that the introduction of such defects leads to a significant expansion of the temperature range of the existence of excess conductivity, and upon doping with praseodymium, it also leads to the appearance of a thermally activated deflection on the temperature dependence of the electrical resistance. The effect of such defects on the superconducting transition temperature, Tc, and the coherence length along the c axis, ξc(0), is studied. In particular, ξc(0) more than quadruples (at z = 0.43), while the 2D-3D crossover point shifts towards higher temperatures. Possible reasons for the suppression of superconductivity in YBa2Cu3O7–δ upon irradiation with fast electrons and the qualitatively different temperature dependences of its resistivity in the basal plane, ρab (T), are discussed.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Composition variation and electron irradiation effects on the fluctuation conductivity in Y1–zPrzBa2Cu3O7−δ single crystals

Chroneos

Kolesnikov

Taranova

et al. 2020

J Mater Sci: Mater Electron

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“…Synthesis of new superconducting materials with tailored current-carrying properties via modification of their structure and charge transport characteristics [1][2][3] is an actual research line in modern condensed matter physics. One of the most efficient experimental approaches allowing one to accomplish this task is irradiation and processing of the investigated samples by electron beams [4][5][6][7] as well as modification of their elemental composition 8,9 . In this respect, cuprates from the high-T c superconducting 1-2-3 system RBa 2 Cu 3 O 7−δ (R = Y or other rare earths) are most asked-for for several reasons.…”

Section: Introductionmentioning

confidence: 99%

Effect of electron irradiation and Pr doping on the charge transport in YBCO single crystals

Вовк

Khadzhai

Dobrovolskiy

2018

Solid State Communications

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The influence of irradiation by electrons with energies of 0.5...2.5 MeV at temperatures of about 10 K on the basal-plane resistivity of the YBa2Cu3O 7−δ single crystals is investigated in the range from Tc to 300 K. The resistivity temperature dependence is determined by defects arising due to the irradiation. These defects directly affect the superconducting transition, decreasing Tc and increasing the transition width without significant distortions of its shape. The resulting defects also lead to an increase in the Debye temperature due to a reduction of the anisotropy, and a noticeable increase in the scattering by phonons in the sample. The excess conductivity does not change with the irradiation used.

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The effect of medium doses electron irradiation on the scattering of charge carriers in YBa2Cu3O7-δ single crystal

Khadzhai,

Goulatis,

Chroneos

et al. 2024

J Mater Sci: Mater Electron

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The influence of electron irradiation with energies of 0.5–2.5 MeV with fluences up to 70 × 1018 cm–2 on the electrical resistivity in the basal plane of YBa2Cu3O7–δ single crystals in the temperature range from the superconducting transition, Tc, to 300 K has been studied. Such irradiation leads to the appearance of a significant number of defects that cause a decrease in anisotropy, an appreciable increase in phonon scattering, reduction of Tc, and broadening of the superconducting transition. Under the conditions specified, the temperature dependence of electrical resistivity is approximated with high accuracy by the charge carriers’ scattering on defects and phonons, and fluctuating conductivity in the Lawrence-Doniach (LD) model. The dependences of approximation parameters on fluence are discussed.

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Effect of electron irradiation on the fluctuation conductivity in YBa2Cu3O7−δ single crystals

Cited by 12 publications

References 41 publications

Composition variation and electron irradiation effects on the fluctuation conductivity in Y1–zPrzBa2Cu3O7−δ single crystals

Composition variation and electron irradiation effects on the fluctuation conductivity in Y1–zPrzBa2Cu3O7−δ single crystals

Effect of electron irradiation and Pr doping on the charge transport in YBCO single crystals

The effect of medium doses electron irradiation on the scattering of charge carriers in YBa2Cu3O7-δ single crystal

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