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

[1] PAIRING INSTABILITIES IN DENSE HYDROGEN [J].

ASHCROFT, NW .

PHYSICAL REVIEW B, 1990, 41 (16) :10963-10971

[2] VIBRATIONAL RAMAN-SPECTRA OF HYDROGEN AND DEUTERIUM MIXTURES AT HIGH-PRESSURES [J].

BROWN, DM ;

DANIELS, WB .

PHYSICAL REVIEW A, 1992, 45 (09) :6429-6435

[3] THEORY OF DENSE HYDROGEN [J].

CHAKRAVARTY, S ;

ROSE, JH ;

WOOD, D ;

ASHCROFT, NW .

PHYSICAL REVIEW B, 1981, 24 (04) :1624-1635

[4]

COULON A, 1980, 7TH P AIRAPT C LE CR, P598

[5]

DANIELS WB, 1991, IN PRESS 13TH P AIRA

[6]

GLAZKOV VP, 1988, JETP LETT+, V47, P763

[7] THE INFRARED FUNDAMENTAL BAND OF LIQUID AND SOLID HYDROGEN [J].

GUSH, HP ;

HARE, WFJ ;

ALLIN, EJ ;

WELSH, HL .

CANADIAN JOURNAL OF PHYSICS, 1960, 38 (02) :176-193

[8] OPTICAL-ABSORPTION MEASUREMENTS OF HYDROGEN AT MEGABAR PRESSURES [J].

HANFLAND, M ;

HEMLEY, RJ ;

MAO, HK .

PHYSICAL REVIEW B, 1991, 43 (10) :8767-8770

[9]

HANFLAND M, IN PRESS

[10] EQUATION OF STATE OF SOLID HYDROGEN AND DEUTERIUM FROM SINGLE-CRYSTAL X-RAY-DIFFRACTION TO 26.5 GPA [J].

HEMLEY, RJ ;

MAO, HK ;

FINGER, LW ;

JEPHCOAT, AP ;

HAZEN, RM ;

ZHA, CS .

PHYSICAL REVIEW B, 1990, 42 (10) :6458-6470

← 1 2 3 4 →