Optical and electronic properties of dense sodium

Miriam Marques; Mario Santoro; Christophe L. Guillaume; Federico A. Gorelli; Julia Contreras-Garcia; Ross T. Howie; Alexander F. Goncharov; Eugene Gregoryanz

doi:10.1103/PhysRevB.83.184106

Optical and electronic properties of dense sodium

Miriam Marques^*, Mario Santoro, Christophe L. Guillaume, Federico A. Gorelli, Julia Contreras-Garcia, Ross T. Howie, Alexander F. Goncharov, Eugene Gregoryanz

^*Corresponding author for this work

School of Physics and Astronomy

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

Abstract / Description of output

High-resolution Raman spectroscopy of dense sodium reveals additonal low-energy lattice excitations in the three high-pressure phases cI 16, oP 8, and tI 19 from 108 to 178 GPa. The Raman-active lattice modes indicate profound changes of the chemical bonding in Na upon its transformation to an insulating state (hP 4 phase) at pressures above 178( 2) GPa. The calculated values of the valence electron localization maxima versus pressure provide insights into the experimentally observed solid-solid phase transitions and anomalous melting behavior of sodium.

Original language	English
Article number	184106
Number of pages	7
Journal	Physical review B
Volume	83
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.83.184106
Publication status	Published - 17 May 2011

Keywords / Materials (for Non-textual outputs)

HIGH-PRESSURE PHASES
RAMAN-SPECTROSCOPY
LITHIUM
METALS
GPA
SUPERCONDUCTIVITY
PSEUDOPOTENTIALS
TRANSITION

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10.1103/PhysRevB.83.184106

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@article{9f82ea6ae26f4b58a2926fe2a7489c79,

title = "Optical and electronic properties of dense sodium",

abstract = "High-resolution Raman spectroscopy of dense sodium reveals additonal low-energy lattice excitations in the three high-pressure phases cI 16, oP 8, and tI 19 from 108 to 178 GPa. The Raman-active lattice modes indicate profound changes of the chemical bonding in Na upon its transformation to an insulating state (hP 4 phase) at pressures above 178( 2) GPa. The calculated values of the valence electron localization maxima versus pressure provide insights into the experimentally observed solid-solid phase transitions and anomalous melting behavior of sodium.",

keywords = "HIGH-PRESSURE PHASES, RAMAN-SPECTROSCOPY, LITHIUM, METALS, GPA, SUPERCONDUCTIVITY, PSEUDOPOTENTIALS, TRANSITION",

author = "Miriam Marques and Mario Santoro and Guillaume, {Christophe L.} and Gorelli, {Federico A.} and Julia Contreras-Garcia and Howie, {Ross T.} and Goncharov, {Alexander F.} and Eugene Gregoryanz",

year = "2011",

month = may,

day = "17",

doi = "10.1103/PhysRevB.83.184106",

language = "English",

volume = "83",

journal = "Physical review B",

issn = "1098-0121",

publisher = "American Physical Society",

number = "18",

}

TY - JOUR

T1 - Optical and electronic properties of dense sodium

AU - Marques, Miriam

AU - Santoro, Mario

AU - Guillaume, Christophe L.

AU - Gorelli, Federico A.

AU - Contreras-Garcia, Julia

AU - Howie, Ross T.

AU - Goncharov, Alexander F.

AU - Gregoryanz, Eugene

PY - 2011/5/17

Y1 - 2011/5/17

N2 - High-resolution Raman spectroscopy of dense sodium reveals additonal low-energy lattice excitations in the three high-pressure phases cI 16, oP 8, and tI 19 from 108 to 178 GPa. The Raman-active lattice modes indicate profound changes of the chemical bonding in Na upon its transformation to an insulating state (hP 4 phase) at pressures above 178( 2) GPa. The calculated values of the valence electron localization maxima versus pressure provide insights into the experimentally observed solid-solid phase transitions and anomalous melting behavior of sodium.

AB - High-resolution Raman spectroscopy of dense sodium reveals additonal low-energy lattice excitations in the three high-pressure phases cI 16, oP 8, and tI 19 from 108 to 178 GPa. The Raman-active lattice modes indicate profound changes of the chemical bonding in Na upon its transformation to an insulating state (hP 4 phase) at pressures above 178( 2) GPa. The calculated values of the valence electron localization maxima versus pressure provide insights into the experimentally observed solid-solid phase transitions and anomalous melting behavior of sodium.

KW - HIGH-PRESSURE PHASES

KW - RAMAN-SPECTROSCOPY

KW - LITHIUM

KW - METALS

KW - GPA

KW - SUPERCONDUCTIVITY

KW - PSEUDOPOTENTIALS

KW - TRANSITION

U2 - 10.1103/PhysRevB.83.184106

DO - 10.1103/PhysRevB.83.184106

M3 - Article

SN - 1098-0121

VL - 83

JO - Physical review B

JF - Physical review B

IS - 18

M1 - 184106

ER -

Optical and electronic properties of dense sodium

Abstract / Description of output

Keywords / Materials (for Non-textual outputs)

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