Abstract
We study the ground state properties of the Holstein–Hubbard model on some bipartite lattices at half-filling; The ground state is proved to exhibit ferrimagnetism whenever the electron–phonon interaction is not so strong. In addition, the antiferromagnetic long-range order is shown to exist in the ground state. In contrast to this, we prove the absence of the long-range charge order.
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Acknowledgements
I would like to thank the anonymous referee for valuable comments. This work was partially supported by KAKENHI (18K0331508) and KAKENHI (16H03942).
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Communicated by Vieri Mastropietro.
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Miyao, T. Ground State Properties of the Holstein–Hubbard Model. Ann. Henri Poincaré 19, 2543–2555 (2018). https://doi.org/10.1007/s00023-018-0690-6
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DOI: https://doi.org/10.1007/s00023-018-0690-6