Electronic and structural transitions in dense liquid sodium

Jean-Yves Raty (), Eric Schwegler and Stanimir A. Bonev ()
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Jean-Yves Raty: FNRS-University of Liège
Eric Schwegler: Lawrence Livermore National Laboratory, Livermore, California 94550, USA
Stanimir A. Bonev: Dalhousie University, Halifax, Nova Scotia B3H 3J5, Canada

Nature, 2007, vol. 449, issue 7161, 448-451

Abstract: Sodium under pressure It has recently been shown that, when high pressures are applied, crystals of lithium and sodium undergo a sequence of phase transitions — including (for sodium) a striking and as yet unexplained pressure-induced drop in the melting temperature. Jean-Yves Raty et al. have now identified the cause of this unusual melting behaviour: it emerges because liquid sodium undergoes a series of transitions similar to those seen in the solid state, but at much lower pressures. Intriguingly, one of these transitions is driven by the opening of a 'pseudogap' in the electronic density of states, the first time such an effect has been seen in a liquid metal.

Date: 2007
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DOI: 10.1038/nature06123

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