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Electronic dynamics...
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Mao, Ho-Kwang
(författare)
Electronic dynamics and plasmons of sodium under compression
- Artikel/kapitelEngelska2011
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2011-12-05
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Proceedings of the National Academy of Sciences,2011
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LIBRIS-ID:oai:DiVA.org:kth-58813
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-58813URI
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https://doi.org/10.1073/pnas.1116930108DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-166723URI
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Språk:engelska
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Sammanfattning på:engelska
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QC 20120109
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Sodium, which has long been regarded as one of the simplest metals, displays a great deal of structural, optical, and electronic complexities under compression. We compressed pure Na in the body-centered cubic structure to 52 GPa and in the face-centered cubic structure from 64 to 97 GPa, and studied the plasmon excitations of both structures using the momentum-dependent inelastic X-ray scattering technique. The plasmon dispersion curves as a function of pressure were extrapolated to zero momentum with a quadratic approximation. As predicted by the simple free-electron model, the square of the zero-momentum plasmon energy increases linearly with densification of the body-centered cubic Na up to 1.5-fold. At further compressions and in face-centered cubic Na above 64 GPa, the linear relation curves progressively toward the density axis up to 3.7-fold densification at 97 GPa. Ab initio calculations indicate that the deviation is an expected behavior of Na remaining a simple metal.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Ding, Yang
(författare)
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Xiao, Yuming
(författare)
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Chow, Paul
(författare)
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Shu, Jinfu
(författare)
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Lebegue, Sebastien
(författare)
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Lazickif, Amy
(författare)
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Ahuja, RajeevUppsala universitet,KTH,Tillämpad materialfysik,Materialteori(Swepub:uu)rajeeva
(författare)
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KTHTillämpad materialfysik
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Proceedings of the National Academy of Sciences of the United States of America: Proceedings of the National Academy of Sciences108:51, s. 20434-204370027-84241091-6490
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