Recovering Metallicity in A4C60: The Case of Monomeric Li4C60

Autor:	M. Riccò, M. Belli, D. Pontiroli, M. Mazzani, T. Shiroka, D. Arcon, A. Zorko, S. Margadonna, G. Ruani
Rok vydání:	2007
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Materials Science Strongly Correlated Electrons (cond-mat.str-el) Physics::Atomic and Molecular Clusters Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Condensed Matter::Strongly Correlated Electrons
Zdroj:	Physical review. B, Rapid communications 75 (2007): 81401. doi:10.1103/PhysRevB.75.081401 info:cnr-pdr/source/autori:M. Riccò; M. Belli; D. Pontiroli; M. Mazzani; T. Shiroka; D. Arcon; A. Zorko; S. Margadonna; G. Ruani/titolo:Recovering metallicity in A4C60: The case of monomeric Li4C60/doi:10.1103%2FPhysRevB.75.081401/rivista:Physical review. B, Rapid communications (print)/anno:2007/pagina_da:81401/pagina_a:/intervallo_pagine:81401/volume:75
DOI:	10.48550/arxiv.cond-mat/0701327
Popis:	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. 4 pages, 3 figures
Databáze:	OpenAIRE
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