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Volume 38 Issue 2
Apr 2024
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Chinese Journal of High Pressure Physics  > 2024  >  38(2): 020102.
GUO Jianning, WANG Yulong, ZHU Chengcheng, HUANG Xiaoli, CUI Tian. Progress of Experimental Research on Binary Hydride Superconductors under High Pressure[J]. Chinese Journal of High Pressure Physics, 2024, 38(2): 020102. doi: 10.11858/gywlxb.20230742
Citation: GUO Jianning, WANG Yulong, ZHU Chengcheng, HUANG Xiaoli, CUI Tian. Progress of Experimental Research on Binary Hydride Superconductors under High Pressure[J]. Chinese Journal of High Pressure Physics, 2024, 38(2): 020102. doi: 10.11858/gywlxb.20230742
shu

Progress of Experimental Research on Binary Hydride Superconductors under High Pressure

doi: 10.11858/gywlxb.20230742
  • 1.

    College of Physics, Jilin University, Changchun 130012, Jilin, China

  • 2.

    School of Physical Science and Technology, Ningbo University, Ningbo 315211, Zhejiang, China

  • Received Date: 27 Sep 2023
  • Rev Recd Date: 17 Jan 2024
  • Accepted Date: 17 Jan 2024
    • Available Online: 11 Apr 2024
  • Issue Publish Date: 05 Apr 2024
    Abstract
  • Since the discovery of superconductivity by the famous physicist Onnes in 1911, people have constantly tried to improve the superconducting transition temperature, and the room-temperature superconductors have also been a century-old dream of human beings. In the course of nearly a hundred years of research, it has constantly updated people’s understanding of superconductivity, enhanced people’s confidence in further improving the superconducting transition temperature and exploring the mechanism of high temperature superconductivity that scientists have discovered copper based superconductors, iron based superconductors and McMillan limit superconductors (like MgB2). Recently, new hydrogen-rich compounds predicted theoretically and verified experimentally have shown great potential for high temperature superconductivity even room temperature superconductivity, becoming one of the best candidates for room temperature superconductors. It is worth noting that some sulfur hydrides and lanthanum hydrides have superconductivity of more than 200 K under high pressure, leading a research boom of hydrogen-rich compounds and some important theoretical and experimental results have emerged. This paper focuses on the current research progress of hydrogen-rich superconductors, summarizes the crystal structure properties and superconducting properties of new hydrogen-rich compounds from the perspective of different hydrogen structural units and hydrogen bonding characteristics. Five kinds of superconductors in hydrogen-rich compounds are introduced in this paper: interstitial type, ionic type, covalent type, cage type and molecular type, and some general rules affecting the superconducting transition temperature are summarized through comparative analysis of different types of hydrogen-rich compound superconductors. In the end, the current experimental problems to be solved and the future experimental direction are put forward.

     

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