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Mottness at finite doping and charge instabilities in cuprates

Nature Physics, ISSN: 1745-2481, Vol: 13, Issue: 8, Page: 806-811
2017
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Article Description

The influence of Mott physics on the doping-temperature phase diagram of copper oxides represents a major issue that is the subject of intense theoretical and experimental efforts. Here, we investigate the ultrafast electron dynamics in prototypical single-layer Bi-based cuprates at the energy scale of the O-2p → Cu-3d charge-transfer (CT) process. We demonstrate a clear evolution of the CT excitations from incoherent and localized, as in a Mott insulator, to coherent and delocalized, as in a conventional metal. This reorganization of the high-energy degrees of freedom occurs at the critical doping pcr 0.16 irrespective of the temperature, and it can be well described by dynamical mean-field theory calculations. We argue that the onset of lowerature charge instabilities is the low-energy manifestation of the underlying Mottness that characterizes the p

Bibliographic Details

Peli, S.; Conte, S. Dal; Comin, R.; Nembrini, N.; Ronchi, A.; Abrami, P.; Banfi, F.; Ferrini, G.; Brida, D.; Lupi, S.; Fabrizio, M.; Damascelli, A.; Capone, M.; Cerullo, G.; Giannetti, C.

Springer Science and Business Media LLC

Physics and Astronomy

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