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Recovering Metallicity in A4C60: The Case of Monomeric Li4C60 | | M. Riccò
; M. Belli
; D. Pontiroli
; M. Mazzani
; T. Shiroka
; D. Arcon
; A. Zorko
; S. Margadonna
; G. Ruani
; | | Date: |
15 Jan 2007 | | Subject: | Strongly Correlated Electrons; Materials Science | | Abstract: | The restoration of metallicity in the high-temperature, cubic phase of Li4C60 represents a remarkable feature for a member of the A4C60 family (A = alkali metal), invariably found to be insulators. Structural and resonance technique investigations on Li4C60 at T > 600 K, show that its fcc structure is associated with a complete (4e) charge transfer to C60 and a sparsely populated Fermi level. These findings not only emphasize the crucial role played by lattice symmetry in fulleride transport properties, but also re-dimension the role of Jahn-Teller effects in band structure determination. Moreover, they suggest the present system as a potential precursor to a new class of superconducting fullerides. | | Source: | arXiv, cond-mat/0701327 | | Services: | Forum | Review | PDF | Favorites | |
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