Heavy fermions and rattling motions in the periodic Anderson–Holstein model
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2006
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Abstract
We investigate a heavy fermion behaviour and a deformation of an effective potential of the ions due to electron–phonon interaction for the periodic Anderson–Holstein model by using the dynamical mean-field theory combined with the exact diagonalization method. For the strong electron–phonon coupling, the system shows an anomalous heavy fermion behaviour with a large lattice fluctuation and an extreme phonon softening, and then an effective potential for the ions changes from a simple harmonic potential for the non-interacting case to a double-well potential for the strong electron–phonon coupling.
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| Authors | K. Mitsumoto,Y. Ono;K. Mitsumoto;Y. Ono; |
| Journal | physica b: condensed matter |
| Year | 2006 |
| DOI |
10.1016/j.physb.2006.01.098
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