Pressure-induced molecular dissociation and metallization in hydrogen-bonded H2S solid

被引：58

作者：

Sakashita, M ^{[1
]}

Yamawaki, H ^{[1
]}

Fujihisa, H ^{[1
]}

Aoki, K ^{[1
]}

Sasaki, S ^{[1
]}

Shimizu, H ^{[1
]}

机构：

[1] GIFU UNIV,DEPT ELECT & COMP ENGN,GIFU 50111,JAPAN

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.79.1082

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Infrared spectra at high pressure and room temperature reveal that molecular dissociation and metallization occur in solid H2S near 46 and 96 GPa, respectively. The disappearance of SH stretching bands in the 2300-2500 cm(-1) region and simultaneous appearance of a lattice vibrational mode around 1300 cm(-1) signal the molecular dissociation. At higher pressures, a low-energy electronic absorption band develops and eventually extends throughout the infrared region studied (700-6900 cm(-1)). Thus, metallization seems to occur by closing a band gap originating from S-S bond formation in the dissociated phase.

引用

收藏

页码：1082 / 1085

页数：4

相关论文

共 16 条

[1] WEDGE-DRIVEN AND MINIATURE DIAMOND-ANVIL CELLS FOR HIGH-PRESSURE OPTICAL AND X-RAY-DIFFRACTION STUDIES [J].

AOKI, K ;

KAKUDATE, Y ;

YOSHIDA, M ;

USUBA, S ;

TANAKA, K ;

FUJIWARA, S .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1987, 26 (12) :2107-2110

[2] Infrared absorption study of the hydrogen-bond symmetrization in ice to 110 GPa [J].

Aoki, K ;

Yamawaki, H ;

Sakashita, M ;

Fujihisa, H .

PHYSICAL REVIEW B, 1996, 54 (22) :15673-15677

[3] Observation of Fano interference in high-pressure ice VII [J].

Aoki, K ;

Yamawaki, H ;

Sakashita, M .

PHYSICAL REVIEW LETTERS, 1996, 76 (05) :784-786

[4]

ENDO S, 1996, PHYS REV B, V54, P717

[5] STRUCTURAL ASPECTS OF DENSE SOLID HALOGENS UNDER HIGH-PRESSURE STUDIED BY X-RAY DIFFRACTION-MOLECULAR DISSOCIATION AND METALLIZATION [J].

FUJIHISA, H ;

FUJII, Y ;

TAKEMURA, K ;

SHIMOMURA, O .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1995, 56 (10) :1439-1444

[6] EVIDENCE FOR MOLECULAR DISSOCIATION IN BROMINE NEAR 80 GPA [J].

FUJII, Y ;

HASE, K ;

OHISHI, Y ;

FUJIHISA, H ;

HAMAYA, N ;

TAKEMURA, K ;

SHIMOMURA, O ;

KIKEGAWA, T ;

AMEMIYA, Y ;

MATSUSHITA, T .

PHYSICAL REVIEW LETTERS, 1989, 63 (05) :536-539

[7] Compression of ice to 210 gigapascals: Infrared evidence for a symmetric hydrogen-bonded phase [J].

Goncharov, AF ;

Struzhkin, VV ;

Somayazulu, MS ;

Hemley, RJ ;

Mao, HK .

SCIENCE, 1996, 273 (5272) :218-220

[8] High-pressure physics - Shocking states of matter [J].

Hemley, RJ ;

Ashcroft, NW .

NATURE, 1996, 380 (6576) :671-672

[9] HIGH-PRESSURE OPTICAL STUDIES ON SULFUR TO 121 GPA - OPTICAL EVIDENCE FOR METALLIZATION [J].

LUO, H ;

DESGRENIERS, S ;

VOHRA, YK ;

RUOFF, AL .

PHYSICAL REVIEW LETTERS, 1991, 67 (21) :2998-3001

[10] CALIBRATION OF THE RUBY PRESSURE GAUGE TO 800-KBAR UNDER QUASI-HYDROSTATIC CONDITIONS [J].

MAO, HK ;

XU, J ;

BELL, PM .

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1986, 91 (B5) :4673-4676