Optical and electronic properties of dense sodium

被引：45

作者：

Marques, Miriam ^{[1
,2
]}

Santoro, Mario ^{[3
,4
]}

Guillaume, Christophe L. ^{[1
,2
]}

Gorelli, Federico A. ^{[3
,4
]}

Contreras-Garcia, Julia ^{[5
]}

Howie, Ross T. ^{[1
,2
]}

Goncharov, Alexander F. ^{[6
]}

Gregoryanz, Eugene ^{[1
,2
]}

机构：

[1] Univ Edinburgh, Ctr Sci Extreme Condit, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] Univ Edinburgh, Sch Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

[3] Univ Florence, European Lab Nonlinear Spect, I-50121 Florence, Italy

[4] UOS Roma, IPCF CNR, I-00185 Rome, Italy

[5] Duke Univ, Dept Chem, Durham, NC 27708 USA

[6] Carnegie Inst Washington, Geophys Lab, Washington, DC 20005 USA

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 18期

基金：

英国工程与自然科学研究理事会; 美国国家科学基金会;

关键词：

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

D O I：

10.1103/PhysRevB.83.184106

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：7

共 45 条

[1] Origin of the complex crystal structures of elements at intermediate pressure [J].