期刊
MODERN PHYSICS LETTERS B
卷 30, 期 4, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217984916500342
关键词
Superconducting cuprates; hafnium; electrical resistance measurements; pseudogap
The electrical conductivity of hafnium (Hf)-doped YBa2Cu3O7-delta ceramics is investigated. Hf doping has been revealed to lead to an increase of the number of effective scattering centers for the normal charge carriers. In a broad temperature range, the excess conductivity of the investigated samples obeys an exponential temperature dependence, while near T-c it is satisfactorily described by the Aslamazov-Larkin model. Meanwhile, Hf doping has been shown to lead to a notable broadening of the temperature range for the manifestation of the pseudogap anomaly in the ab-plane.
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