Exact many-electron ground states on the diamond Hubbard chain |
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| Authors: | Gulácsi Zsolt Kampf Arno Vollhardt Dieter |
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| Institution: | Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute for Physics, University of Augsburg, D-86135 Augsburg, Germany. |
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| Abstract: | Exact ground states of interacting electrons on the diamond Hubbard chain in a magnetic field are constructed which exhibit a wide range of properties such as flat-band ferromagnetism and correlation-induced metallic, half-metallic, or insulating behavior. The properties of these ground states can be tuned by changing the magnetic flux, local potentials, or electron density. |
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