Transport anomalies and the role of pseudogap in the 60-K phase of YBa(2)Cu(3)O(7-delta) |
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Authors: | Segawa K Ando Y |
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Institution: | Central Research Institute of Electric Power Industry, Komae, Tokyo 201-8511, Japan. |
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Abstract: | We report the result of our accurate measurements of the a- and b-axis resistivity, Hall coefficient, and the a-axis thermopower in untwinned YBa(2)Cu(3)O(y) single crystals in a wide range of doping. It is found that both the a-axis resistivity and the Hall conductivity show anomalous dependences on the oxygen content y in the 60-K phase below the pseudogap temperature T(*). The complete data set enables us to narrow down the possible pictures of the 60-K phase, with which we discuss a peculiar role of the pseudogap in the charge transport. |
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