Charge transfer near the Néel temperature in La2CuO4+x |
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| Authors: | O E Parfenov A A Nikonov S N Barilo |
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| Institution: | (1) Russian Research Centre Kurchatov Institute, pl. Kurchatova 1, Moscow, 123182, Russia;(2) Institute of Solid-State and Semiconductor Physics, Belarussian Academy of Sciences, ul. Brovki 17, Minsk, 220072, Belarus |
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| Abstract: | The electrical resistance and the thermoelectric power in the ab plane of a weakly oxygen-doped La2CuO4+x crystal (0.001<x<0.007) and its static magnetic susceptibility were studied in the vicinity of antiferromagnetic transition. The electrical resistance and the thermoelectric power behave anomalously near the Néel temperature, indicating that the transport is strongly affected by the establishment of long-range antiferromagnetic order. Analysis of the obtained data allows the conclusion to be drawn that the doping gives rise to a conduction band as a result of the overlap between the wave functions of deep impurity states that are strongly renormalized due to the correlation and polaron effects. |
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