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Electronic structure, magnetism, and superconductivity of MgCxNi3

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Published in Physical Review. B, Condensed Matter. 2001, vol. 64, p. 100508R
Abstract The electronic structure of the newly discovered superconducting perovskite MgCNi3 is calculated using the LMTO method. The states near the Fermi energy are found to be dominated by Ni-d. The Stoner factor is low while the electron-phonon coupling constant is estimated to be about 0.5, which suggests that the material is a conventional type of superconductor where Tc is not affected by magnetic interactions. However, the proximity of the Fermi energy to a large peak in the density of states in conjunction with the reported nonstoichiometry of the compound has consequences for the stability of the results.
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Research group Groupe Giamarchi
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DUGDALE, Stephen, JARLBORG, Thomas N. Electronic structure, magnetism, and superconductivity of MgCxNi3. In: Physical Review. B, Condensed Matter, 2001, vol. 64, p. 100508R. https://archive-ouverte.unige.ch/unige:35638

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Deposited on : 2014-04-14

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