静态高压下氢的金属化研究与非弹性X射线散射技术

李冰; 丁阳; 王霖; 翁祖谦; 杨文革; 吉诚; 杨科; 毛河光

doi:10.11858/gywlxb.20210864

静态高压下氢的金属化研究与非弹性X射线散射技术

doi: 10.11858/gywlxb.20210864

李冰^1,,
丁阳¹,
王霖^{1, 2},
翁祖谦^{1, 3},
杨文革¹,
吉诚¹,
杨科⁴,
毛河光^1,*, ,

1.
北京高压科学研究中心，北京　100094
2.
燕山大学高压科学中心亚稳材料制备技术与科学国家重点实验室，河北秦皇岛　066004
3.
上海科技大学物质科学与技术学院，上海　201210
4.
中国科学院上海高等研究院，上海　201204

基金项目: 国家自然科学基金（U1930401）

详细信息

作者简介:
李　冰（1982－），男，博士，研究员，主要从事超高压实验相关凝聚态物理研究. E-mail：libing@hpstar.ac.cn

通讯作者:
毛河光（1941－），男，博士，中心主任，主要从事物理、地学、化学、材料学等多领域的高压科学研究. E-mail：maohk@hpstar.ac.cn

中图分类号: O521.3; O521.2
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出版历程
- 收稿日期: 2021-08-11
- 修回日期: 2021-09-06

Metallization of Hydrogen under Static High Pressure and the Inelastic X-ray Scattering Technique

LI Bing^1
,,
DING Yang¹,
WANG Lin^{1, 2},
WENG Zuqian^{1, 3},
YANG Wenge¹,
JI Cheng¹,
YANG Ke⁴,
MAO Ho-kwang^{1,*
, ,}

1.
Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China
2.
Center for High Pressure Science, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China
3.
School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.
4.
Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China

摘要

摘要: 高压下氢的研究一直是高压物理实验和理论研究的热点，这源于人们对压致金属态—金属氢的追求。氢的压致金属化归根结底是氢的电子结构变化。在压力作用下，氢的电子结构会从低压下的宽禁带绝缘体转变为高压下的窄带隙半导体，最终成为超高压下带隙闭合的金属态。然而，多年来，由于实验条件所限，一直无法对氢的宽禁带带隙和电子结构进行直接实验观测。本文将介绍氢金属化实验技术方面存在的挑战和经历的发展，以及利用新近发展的基于同步辐射非弹性X射线散射技术首次对宽禁带固态氢带隙的研究和相关技术突破，并探讨其可能的发展趋势和方向。
- 氢 /
- 超高压 /
- 非弹性X 射线散射
Abstract: The research on hydrogen under high pressure has always been a hot topic both in experimental and theoretical physics, the enthusiasm is rooted from the pursuit of its pressure-induced metallic state – metallic hydrogen. The pressure induced metallization of hydrogen is an electric phase transition from a wide gap insulator to a small gap semiconductor, and finally to a closed gap metal. However, due to the limitation of high pressure experiment conditions, the bandgap and electronic structure of the wide-gap hydrogen has never been directly observed. In this paper we will discuss the technical challenge and the development of experiment research on hydrogen metallization, meanwhile we will present our experiment results and the technical advance on the direct measurement of the wide-gap hydrogen by using inelastic X-ray scattering technique, and finally the outlook.
- hydrogen /
- ultra-high pressure /
- inelastic X-ray scattering

HTML全文

图 1 Mao-type对称式金刚石对顶砧压机及反射、透射光路示意图

Figure 1. Symmetric Mao-type DAC and schematic drawing of optical reflection and transmission geometries

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图 2 高压下氢的电阻测量结果^[14](a)和可见吸收光谱测量结果^[19](b)

Figure 2. High pressure electrical measurement^[14](a) and optical absorption measurement^[19](b) on hydrogen

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图 3 高压下通过探测介电性质研究氢的带隙变化趋势^[35-37]

Figure 3. Trend of hydrogen gap closure under highpressure using dielectric measurements^[35-37]

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图 4 全景式金刚石对顶砧压机（a）和高压非弹性X射线散射光路示意图（b）

Figure 4. Panoramic DAC (a) and schematic drawing of inelastic X-ray scattering geometry (b)

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图 5 高压氢的非弹性X射线散射谱（a）和氢的带隙变化趋势（b）

Figure 5. IXS of hydrogen under high pressure (a) and trend of hydrogen gap closure (b)

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