Synchrotron infrared spectroscopy to 0.15 eV of H-2 and D-2 at megabar pressures

被引：85

作者：

Hemley, RJ ^{[1
]}

Mao, HK ^{[1
]}

Goncharov, A ^{[1
]}

Hanfland, M ^{[1
]}

Struzhkin, V ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.76.1667

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

New synchrotron infrared absorption and reflectivity techniques have been developed to test predicted band overlap metallization in H-2 and D-2 above 150 GPa at various temperatures. Measurements on both isotopes to maximum pressures of 216 GPa show no evidence for Drude excitations in the midinfrared to near-infrared spectrum. The most definitive are measurements on D-2, which remains transparent down to 0.15 eV at 170 GPa and 83 K. The results put new bounds on the optical conductivity and possible band-gap closure at the 150-GPa transition. In addition to strong vibrational transitions, new infrared absorption features are observed.

引用

页码：1667 / 1670

页数：4

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