Anomalous optical and electronic properties of dense sodium

A. Lazicki; A. F. Goncharov; V. V. Struzhkin; R. E. Cohen; Z. Liu; E. Gregoryanz; C. Guillaume; H. -K. Mao; Russell J. Hemley

doi:10.1073/pnas.0902062106

Anomalous optical and electronic properties of dense sodium

A. Lazicki, A. F. Goncharov, V. V. Struzhkin, R. E. Cohen, Z. Liu, E. Gregoryanz, C. Guillaume, H. -K. Mao, Russell J. Hemley

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract / Description of output

Synchrotron infrared spectroscopy on sodium shows a transition from a high reflectivity, nearly free-electron metal to a low-reflectivity, poor metal in an orthorhombic phase at 118 GPa. Optical spectra calculated within density functional theory (DFT) agree with the experimental measurements and predict a gap opening in the orthorhombic phase at compression beyond its stability field, a state that would be experimentally attainable by appropriate choice of pressure-temperature path. We show that a transition to an incommensurate phase at 125 GPa results in a partial recovery of good metallic character up to 180 GPa, demonstrating the strong relationship between structure and electronic properties in sodium.

Original language	English
Pages (from-to)	6525-6528
Number of pages	4
Journal	Proceedings of the National Academy of Sciences (PNAS)
Volume	106
Issue number	16
DOIs	https://doi.org/10.1073/pnas.0902062106
Publication status	Published - 21 Apr 2009

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title = "Anomalous optical and electronic properties of dense sodium",

abstract = "Synchrotron infrared spectroscopy on sodium shows a transition from a high reflectivity, nearly free-electron metal to a low-reflectivity, poor metal in an orthorhombic phase at 118 GPa. Optical spectra calculated within density functional theory (DFT) agree with the experimental measurements and predict a gap opening in the orthorhombic phase at compression beyond its stability field, a state that would be experimentally attainable by appropriate choice of pressure-temperature path. We show that a transition to an incommensurate phase at 125 GPa results in a partial recovery of good metallic character up to 180 GPa, demonstrating the strong relationship between structure and electronic properties in sodium.",

author = "A. Lazicki and Goncharov, {A. F.} and Struzhkin, {V. V.} and Cohen, {R. E.} and Z. Liu and E. Gregoryanz and C. Guillaume and Mao, {H. -K.} and Hemley, {Russell J.}",

year = "2009",

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doi = "10.1073/pnas.0902062106",

language = "English",

volume = "106",

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journal = "Proceedings of the National Academy of Sciences (PNAS)",

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TY - JOUR

T1 - Anomalous optical and electronic properties of dense sodium

AU - Lazicki, A.

AU - Goncharov, A. F.

AU - Struzhkin, V. V.

AU - Cohen, R. E.

AU - Liu, Z.

AU - Gregoryanz, E.

AU - Guillaume, C.

AU - Mao, H. -K.

AU - Hemley, Russell J.

PY - 2009/4/21

Y1 - 2009/4/21

N2 - Synchrotron infrared spectroscopy on sodium shows a transition from a high reflectivity, nearly free-electron metal to a low-reflectivity, poor metal in an orthorhombic phase at 118 GPa. Optical spectra calculated within density functional theory (DFT) agree with the experimental measurements and predict a gap opening in the orthorhombic phase at compression beyond its stability field, a state that would be experimentally attainable by appropriate choice of pressure-temperature path. We show that a transition to an incommensurate phase at 125 GPa results in a partial recovery of good metallic character up to 180 GPa, demonstrating the strong relationship between structure and electronic properties in sodium.

AB - Synchrotron infrared spectroscopy on sodium shows a transition from a high reflectivity, nearly free-electron metal to a low-reflectivity, poor metal in an orthorhombic phase at 118 GPa. Optical spectra calculated within density functional theory (DFT) agree with the experimental measurements and predict a gap opening in the orthorhombic phase at compression beyond its stability field, a state that would be experimentally attainable by appropriate choice of pressure-temperature path. We show that a transition to an incommensurate phase at 125 GPa results in a partial recovery of good metallic character up to 180 GPa, demonstrating the strong relationship between structure and electronic properties in sodium.

U2 - 10.1073/pnas.0902062106

DO - 10.1073/pnas.0902062106

M3 - Article

SN - 0027-8424

VL - 106

SP - 6525

EP - 6528

JO - Proceedings of the National Academy of Sciences (PNAS)

JF - Proceedings of the National Academy of Sciences (PNAS)

IS - 16

ER -

Anomalous optical and electronic properties of dense sodium

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