SYNCHROTRON INFRARED-SPECTROSCOPY AT MEGABAR PRESSURES - VIBRATIONAL DYNAMICS OF HYDROGEN TO 180 GPA

被引：76

作者：

HANFLAND, M

HEMLEY, RJ

MAO, HK

WILLIAMS, GP

机构：

[1] CARNEGIE INST WASHINGTON,CTR HIGH PRESSURE RES,WASHINGTON,DC 20015

[2] BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE,UPTON,NY 11973

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.69.1129

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have developed new techniques for measuring infrared spectra at megabar pressures using synchrotron radiation and applied them to study the Q1(1), Q1(1) + S1(0), and Q(R)(J) vibrational transitions of solid hydrogen to 180 GPa. The frequency difference between the Q1(1) infrared and Raman vibrons increases from 3 cm-1 (zero pressure) to 510 cm -1 (180 GPa), indicating a dramatic increase in intermolecular coupling with pressure. A negative frequency shift is observed for the infrared vibron above 140 GPa. A significant increase in frequency and LO-TO splitting of the lattice phonon is also documented.

引用

页码：1129 / 1132

页数：4

共 34 条

[21] PROPERTIES OF H-2 UNDER STRONG COMPRESSION IN A NE MATRIX [J].