Resistivity anisotropy in YBCO single crystals irradiated with fast electrons

Temperature dependences of the longitudinal and transverse resistivity of YBa2Cu3O7−δ single crystals irradiated with fast electrons are investigated. It is revealed that the ratio of the normal-state resistivity along the c-axis and in the ab-plane, ρc∕ρab, markedly decreases with increase of the n...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2019-08, Vol.566, p.121-124
Main Authors: Khadzhai, Georgij Ya, Vovk, Ruslan V., Dobrovolskiy, Oleksandr V.
Format: Article
Language:English
Subjects:
Anisotropy
Conductivity
Conductivity anisotropy
Crystal defects
Electrical resistivity
Electron irradiation
Electrons
Hopping conduction
Hopping conductivity
Longitude
Single crystals
Temperature dependence
Temperature effects
YBCO single crystals
YBCO superconductors
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Summary:Temperature dependences of the longitudinal and transverse resistivity of YBa2Cu3O7−δ single crystals irradiated with fast electrons are investigated. It is revealed that the ratio of the normal-state resistivity along the c-axis and in the ab-plane, ρc∕ρab, markedly decreases with increase of the number of structural defects induced by the electron irradiation. Importantly, the temperature dependence of the ratio ρc∕ρab can be described well by both, the universal “law of 1/2” for the variable-range hopping conductivity as well as the conventional exponential expression for the thermally activated conductivity. •YBCO single crystals have been irradiated with fast electrons.•A marked decrease of the resistance anisotropy has been observed.•Temperature dependences of the resistance ratio are fitted to theoretical models.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2019.05.004