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- W2078840986 abstract "We report Hall effect measurements on three different types of YBa2Cu3O7−δ samples. Two of them were well-oxygenated superconducting films while one of them was an oxygen-depleted semiconducting film. One of the superconducting samples was c-axis oriented while the other had a mixture of c- and off-c-axis orientations as evident from resistivity and Raman spectroscopy analysis. According to Anderson, cuprate superconductors in normal state have separate spin and charge excitations called spinons and holons, respectively. The spinon bandwidth Ws defines the energy scale that determines the temperature dependence of the Hall coefficient. It was found that, for the same experimental conditions, Ws decreased for the sample with an off-c-axis growth compared to the perfectly c-axis oriented sample. The cotangent of Hall angle θH showed a reasonably good quadratic dependence on temperature for both superconducting samples in normal state. In contrast, the semiconducting film, due to an inadequate stoichiometry for superconducting behavior, had a high resistivity and its cotangent of the Hall angle decreased with temperature." @default.
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- W2078840986 date "1995-12-01" @default.
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- W2078840986 title "Studies and implications of the Hall effect in superconducting and semiconducting YBa2Cu3O7−δ thin films" @default.
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- W2078840986 doi "https://doi.org/10.1063/1.360486" @default.
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