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Structurally induced insulator-metal transition in solid oxygen: A quasiparticle investigation
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2008 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 77, no 9Article in journal (Refereed) Published
Abstract [en]

Structural phase transition of solid oxygen has been investigated by using ab initio calculations based on density functional theory. We found sudden jumps in structural parameters at the transition pressure, which confirm that the epsilon (epsilon) phase undergoes a first-order isostructural phase transformation to the zeta (epsilon) phase. In particular, this happens without any molecular dissociation. Using the GW approximation to calculate the band-gap closure under high pressure, we show that the structural transition is accompanied by an insulator-metal transition, contrary to a standard density functional calculation which predicts a metallization at a much lower pressure in the epsilon phase.

Place, publisher, year, edition, pages
2008. Vol. 77, no 9
Keyword [en]
greens-function, electron-gas, phase, approximation, metallization, diffraction, gpa
Identifiers
URN: urn:nbn:se:kth:diva-17421DOI: 10.1103/PhysRevB.77.092104ISI: 000254542500004Scopus ID: 2-s2.0-41549135979OAI: oai:DiVA.org:kth-17421DiVA: diva2:335465
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Ahuja, Rajeev
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