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  The strength of electron electron correlation in Cs3C60

Baldassarre, L., Perucchi, A., Mitrano, M., Nicoletti, D., Marini, C., Pontiroli, D., et al. (2015). The strength of electron electron correlation in Cs3C60. Scientific Reports, 5: 15240. doi:10.1038/srep15240.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-E61B-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-E622-6
Genre: Journal Article

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srep15240.pdf (Publisher version), 688KB
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http://dx.doi.org/10.1038/srep15240 (Publisher version)
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 Creators:
Baldassarre, L.1, Author
Perucchi, A.2, Author
Mitrano, Matteo3, 4, Author              
Nicoletti, Daniele3, 4, Author              
Marini, C.5, Author
Pontiroli, D.6, Author
Mazzani, M.6, Author
Aramini, M.6, Author
Riccó, M.6, Author
Giovannetti, G.7, Author
Capone, M.7, Author
Lupi, S.8, Author
Affiliations:
1Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, V.le Regina Elena 291, Rome, Italy, ou_persistent22              
2INSTM Udr Trieste-ST and Elettra - Sincrotrone Trieste S.C.p.A. in Area Science park, S.S. 14, km 163,5, Basovizza, Trieste, Italy, ou_persistent22              
3Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
4Center for Free-Electron Laser Science (CFEL), 22761 Hamburg, Germany, ou_persistent22              
5CELLS-ALBA, Carretera B.P. 1413, Cerdanyola del Valles, 08290, Spain, ou_persistent22              
6Dipartimento di Fisica e Scienze della Terra, Universitá di Parma, Parma, Italy, ou_persistent22              
7CNR-IOM-Democritos National Simulation Centre and International School for Advanced Studies (SISSA), Trieste, Italy, ou_persistent22              
8CNR-IOM, and Dipartimento di Fisica, Universitá di Roma “La Sapienza”, Rome, Italy, ou_persistent22              

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 Abstract: Cs3C60 is an antiferromagnetic insulator that under pressure (P) becomes metallic and superconducting below Tc = 38 K. The superconducting dome present in the T − P phase diagram close to a magnetic state reminds what found in superconducting cuprates and pnictides, strongly suggesting that superconductivity is not of the conventional Bardeen-Cooper-Schrieffer (BCS) type We investigate the insulator to metal transition induced by pressure in Cs3C60 by means of infrared spectroscopy supplemented by Dynamical Mean-Field Theory calculations. The insulating compound is driven towards a metallic-like behaviour, while strong correlations survive in the investigated pressure range. The metallization process is accompanied by an enhancement of the Jahn-Teller effect. This shows that electronic correlations are crucial in determining the insulating behaviour at ambient pressure and the bad metallic nature for increasing pressure. On the other hand, the relevance of the Jahn-Teller coupling in the metallic state confirms that phonon coupling survives in the presence of strong correlations.

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Language(s): eng - English
 Dates: 2015-03-172015-08-242015-10-15
 Publication Status: Published online
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1038/srep15240
 Degree: -

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Title: Scientific Reports
  Abbreviation : Sci. Rep.
Source Genre: Journal
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Publ. Info: London, UK : Nature Publishing Group
Pages: - Volume / Issue: 5 Sequence Number: 15240 Start / End Page: - Identifier: Other: 2045-2322
CoNE: /journals/resource/2045-2322