Emergent reduction of electronic state dimensionality in dense ordered Li-Be alloys

Ji Feng, Richard G. Hennig, N. W. Ashcroft () and Roald Hoffmann ()
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Ji Feng: Cornell University, Baker Laboratory, Ithaca, New York 14853-1301, USA
Richard G. Hennig: Cornell University, Bard Hall, Ithaca, New York 14853-1501, USA
N. W. Ashcroft: Laboratory of Atomic and Solid State Physics and Cornell Center for Materials Research, Cornell University, Clark Hall, Ithaca, New York 14853-2501, USA
Roald Hoffmann: Cornell University, Baker Laboratory, Ithaca, New York 14853-1301, USA

Nature, 2008, vol. 451, issue 7177, 445-448

Abstract: Making light alloys work The two lightest metallic elements, lithium and beryllium, do not interact with each other to form an alloy in ambient conditions. But the structure and also the reactivity of many compounds can be altered fundamentally by subjecting them to high pressure. A new computational study suggests that in the case of lithium and beryllium, four alloys — LiBe, LiBe2, LiBe4 and Li3Be — should be stable at readily accessible pressures. Intriguingly, two-dimensional layers of almost ideal free-electron-like states appear within the three-dimensional crystal environment of one of the alloys, which may also have interesting superconducting properties.

Date: 2008
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DOI: 10.1038/nature06442

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