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Thermoelectric power and superconducting transition in high-temperature superconductors Dy1−xPrxBa2Cu3O7

✍ Scribed by Z.J Huang; J.G Lin; J.J Lin; J.C Ho; C.Y Huang

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
351 KB
Volume
269
Category
Article
ISSN
0921-4534

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✦ Synopsis

The thermoelectric power (S) and superconducting transition temperature (T e) have been systematically measured for a series of Dy 1 _xPr~Ba2Cu307_ d with x from 0 to 0.6. Our results show that S increases progressively with increasing x while T c decreases. Based on the empirical relation between S and the carrier concentration (n), n has been extracted. The result shows a clear reduction of n with increasing x, with a linear relation for x > 0.15. This hole reduction is consistent with the hole-depletion model proposed by Liechtenstein and Mazin. Our Tc-n data are in a remarkable agreement with the universal parabolic T~-n relation, demonstrating that the T c suppression with Pr doping comes mainly from the hole-depletion effect.

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