Ferromagnetism in the single-band Hubbard model: An exact high-temperature expansion |
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| Authors: | Michael Plischke |
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| Institution: | (1) Theoretical Physics Institute, University of Alberta, Edmonton, Alberta, Canada |
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| Abstract: | The first ten terms of the high-temperature expansion of the susceptibility of the single-band Hubbard model in the strong correlation limit are obtained for arbitrary electron density. The series is analyzed by ratio methods and Padé approximants. A critical temperature is found for 0.2   0.8; for > 1 further terms in the series are required.Supported in part by the National Research Council of Canada. |
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| Keywords: | Hubbard model ferromagnetism high-temperature expansion phase transition |
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