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Interplay between charge-lattice interaction and strong electron correlations in cuprates: Phonon anomaly and spectral kinks (Articolo in rivista)
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- Interplay between charge-lattice interaction and strong electron correlations in cuprates: Phonon anomaly and spectral kinks (Articolo in rivista) (literal)
- Anno
- 2010-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1209/0295-5075/91/47007 (literal)
- Alternative label
De Filippis, G; Cataudella, V; Citro, R; Perroni, CA; Mishchenko, AS; Nagaosa, N (2010)
Interplay between charge-lattice interaction and strong electron correlations in cuprates: Phonon anomaly and spectral kinks
in Europhysics letters (Online)
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- De Filippis, G; Cataudella, V; Citro, R; Perroni, CA; Mishchenko, AS; Nagaosa, N (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
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- 1 SPIN-CNR and Dipartimento di Scienze Fisiche, Universit`a di Napoli Federico II - I-80126 Napoli, Italy, EU;
2 SPIN-CNR and Dipartimento di Fisica \"E. R. Caianiello\", Universit`a di Salerno - I-84100 Salerno, Italy, EU;
3 Cross-Correlated Materials Research Group (CMRG), ASI, RIKEN - Wako 351-0198, Japan;
4 RRC \"Kurchatov Institute\" - 123182 Moscow, Russia;
5 Department of Applied Physics, The University of Tokyo - 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan (literal)
- Titolo
- Interplay between charge-lattice interaction and strong electron correlations in cuprates: Phonon anomaly and spectral kinks (literal)
- Abstract
- We investigate the interplay between strong electron correlations and charge-lattice interaction in cuprates. The coupling between half-breathing bond-stretching phonons and doped holes in the t-t'-J model is studied by the limited phonon basis exact diagonalization method. Nonadiabatic electron-phonon interaction leads to the splitting of the phonon spectral function at half-way to the zone boundary at (d) over right arrow (s) - {(+/-pi/2, 0), (0,+/-pi/2)} and to low-energy kink feature in the electron dispersion, in agreement with experimental observations. Another kink due to strong electron correlation effects is observed at higher energy, depending on the strength of the charge-lattice coupling. (literal)
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