ANOMALOUS LOW-FREQUENCY EXCITATIONS IN DIAMOND-CELL STUDIES OF HYDROGEN AT MEGABAR PRESSURES

被引：10

作者：

HEMLEY, RJ ^{[1
]}

MAO, HK ^{[1
]}

机构：

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

来源：

PHYSICS LETTERS A | 1992年 / 163卷 / 5-6期

关键词：

D O I：

10.1016/0375-9601(92)90851-C

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report observations of an intense Raman peak at 240 cm-1 that appears abruptly above 150 GPa at low temperatures (e.g., 77 K) in diamond-cell samples of hydrogen and deuterium. The band disappears above a critical temperature. The spectral changes are interpreted as evidence for a new high-pressure transformation.

引用

页码：429 / 434

页数：6

共 30 条

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

ASHCROFT, NW .

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

[2]

ASHCROFT NW, 1991, MOLECULAR SYSTEMS UNDER HIGH PRESSURE, P201

[3] ULTRAHIGH PRESSURE - BEYOND 2-MEGABARS AND THE RUBY FLUORESCENCE SCALE [J].

BELL, PM ;

MAO, HK ;

GOETTEL, K .

SCIENCE, 1984, 226 (4674) :542-544

[4]

CARDONA M, 1984, LIGHT SCATTERING SOL, V4

[5] THE JAHN-TELLER EFFECT AND VIBRONIC COUPLING AT DEEP LEVELS IN DIAMOND [J].

DAVIES, G .

REPORTS ON PROGRESS IN PHYSICS, 1981, 44 (07) :787-830

[6] BAND-GAP CLOSURE AND METALLIZATION OF MOLECULAR-SOLID HYDROGEN [J].

GARCIA, A ;

BARBEE, TW ;

COHEN, ML ;

SILVERA, IF .

EUROPHYSICS LETTERS, 1990, 13 (04) :355-360

[7]

Goncharov A. F., 1987, Soviet Physics - Uspekhi, V30, P525, DOI 10.1070/PU1987v030n06ABEH002854

[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] LASER TECHNIQUES IN HIGH-PRESSURE GEOPHYSICS [J].

HEMLEY, RJ ;

BELL, PM ;

MAO, HK .

SCIENCE, 1987, 237 (4815) :605-612

[10] X-RAY-DIFFRACTION AND EQUATION OF STATE OF SOLID NEON TO 110-GPA [J].

HEMLEY, RJ ;

ZHA, CS ;

JEPHCOAT, AP ;

MAO, HK ;

FINGER, LW ;

COX, DE .

PHYSICAL REVIEW B, 1989, 39 (16) :11820-11827

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