高压下氢基高温超导体研究的新进展

赵文迪 段德芳 崔田

赵文迪, 段德芳, 崔田. 高压下氢基高温超导体研究的新进展[J]. 高压物理学报, 2021, 35(2): 020101. doi: 10.11858/gywlxb.20210727
引用本文: 赵文迪, 段德芳, 崔田. 高压下氢基高温超导体研究的新进展[J]. 高压物理学报, 2021, 35(2): 020101. doi: 10.11858/gywlxb.20210727
ZHAO Wendi, DUAN Defang, CUI Tian. New Developments of Hydrogen-Based High-Temperature Superconductors under High Pressure[J]. Chinese Journal of High Pressure Physics, 2021, 35(2): 020101. doi: 10.11858/gywlxb.20210727
Citation: ZHAO Wendi, DUAN Defang, CUI Tian. New Developments of Hydrogen-Based High-Temperature Superconductors under High Pressure[J]. Chinese Journal of High Pressure Physics, 2021, 35(2): 020101. doi: 10.11858/gywlxb.20210727

高压下氢基高温超导体研究的新进展

doi: 10.11858/gywlxb.20210727
基金项目: 国家自然科学基金(51632002, 52072188, 11674122);教育部长江学者和创新团队发展计划(IRT_15R23)
详细信息
    作者简介:

    赵文迪(1996-),男,硕士研究生,主要从事高压下氢基高温超导材料的结构与性质研究. E-mail:zwendi@yeah.net

    通讯作者:

    段德芳(1982-),女,博士,教授,主要从事高压下富氢超导材料的计算机模拟研究. E-mail:duandf@jlu.edu.cn

    崔 田(1964-),男,博士,教授,主要从事高压下凝聚态物质结构与性质研究. E-mail:cuitian@nbu.edu.cn

  • 中图分类号: O521.2

New Developments of Hydrogen-Based High-Temperature Superconductors under High Pressure

  • 摘要: 富氢材料被认为是室温超导体的最佳候选体系,是物理学、材料科学等多学科的热点研究领域之一。理论和实验研究发现的新型共价氢化物H3S和笼状氢化物LaH10的超导转变温度(Tc)均超过 200 K,进一步推动了对富氢化合物超导电性的探索。最近,通过高压实验合成的碳质硫氢化物在288 K的室温下实现了零电阻,让人们看到了室温超导的曙光。本文结合课题组在此领域的主要成果,介绍了3类典型富氢化合物的结构及超导特性,包括近期首次在层状氢化物中发现的具有类五角石墨烯结构的富氢超导体HfH10,其超导转变温度高达213~234 K。

     

  • 图  (a)200 GPa下Im${\overline{3}} $m-H3S的晶体结构[13],(b)Im${\overline{3}} $m-H3S (100) 晶面的二维电子局域函数[13]

    Figure  1.  (a) Im${\overline{3}} $m-H3S structure at 200 GPa[13], (b) the calculated electron localization function of Im${\overline{3}} $m-H3S for (100) plane[13]

    图  (a)Fm${\overline{3}} $m-LaH10结构中的H32笼状结构[17],(b)P63/mmc-CeH9结构中的H29笼状结构[44],(c)各二元富氢化物中的最近邻氢原子距离与金属氢中最近邻氢原子距离的比较[44]

    Figure  2.  (a) The H32 cage in Fm${\overline{3}} $m-LaH10[17], (b) the H29 cage in P63/mmc-CeH9[44], (c) the evolution of nearest-neighbor H-H distances in polyhydrides and atomic metallic H2 as a function of pressure[44]

    图  (a)P63/mmc-HfH10的层状晶体结构[33],(b)P63/mmc-HfH10的单层结构[33]

    Figure  3.  (a) The crystal structure of layered P63/mmc in HfH10[33], (b) a layer of the P63/mmc-HfH10 structure[33]

    表  1  3类高Tc氢化物中氢的结构类型、金属的原子半径、电负性、价电子排布、晶体结构对称性以及对应压力点下超导电性的对比[33]

    Table  1.   Comparison of structural types, atomic radius, electronegativity, electronic configuration, crystal structure symmetry and superconductivity of H in three types of high Tc hydrides[33]

    Hydrogenic
    motifs
    HydridesAtomic
    radius/Å
    ElectronegativityElectronic
    configuration
    Space groupTc/K
    H3S1.842.58[Ne] 3s23p4Im${\overline{3}} $m204a (200 GPa)[13],
    203b (155 GPa)[28]
    H3Se1.982.55[Ne] 3d104s24p4Im${\overline{3}} $m110a (200 GPa)[52]
    LaH101.881.10[Xe] 5d16s2Fm${\overline{3}} $m288a (200 GPa)[18],
    250–260b
    (170–200 GPa)[31, 30]
    YH101.811.22[Kr] 4d15s2Fm${\overline{3}} $m303a (400 GPa)[18]
    ThH101.801.30[Rn] 6d27s2Fm${\overline{3}} $m241a (100 GPa)[19],
    161b (174 GPa)[32]
    HfH101.561.30[Xe] 4f145d26s2P63/mmc234c (250 GPa)
    ZrH101.601.33[Kr] 4d25s2P63/mmc220c (250 GPa)
    ScH101.611.36[Ar] 3d14s2P63/mmc158c (250 GPa)
    LuH101.731.27[Xe] 4f145d16s2P63/mmc152c (200 GPa)
    Note : (1) The superscript “a” denotes the calculated Tc with fixed $\;\mu ^*$ = 0.1 ($\;\mu ^*$ is the coulomb parameter);
    (2) The superscript “b” denotes the experimental Tc in previous work;
    (3) The superscript “c” denotes the obtained Tc using G-K equation with $\;\mu ^*$ = 0.1.
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  • 收稿日期:  2021-02-28
  • 修回日期:  2021-03-14

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