Superconductivity Observed in Tantalum Polyhydride at High Pressure  

作　　者：何鑫 张昌玲 李芷文 张思佳 闵保森 张俊 卢可 赵建发 史鲁川 彭毅 望贤成 冯少敏 宋静 王鲁红 V.B.Prakapenka S.Chariton 刘浩哲 靳常青 X.He;C.L.Zhang;Z.W.Li;S.J.Zhang;B.S.Min;J.Zhang;K.Lu;J.F.Zhao;L.C.Shi;Y.Peng;X.C.Wang;S.M.Feng;J.Song;L.H.Wang;V.B.Prakapenka;S.Chariton;H.Z.Liu;C.Q.Jin(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China;Songshan Lake Materials Laboratory,Dongguan 523808,China;Shanghai Advanced Research in Physical Sciences,Shanghai 201203,China;Department of Geology,University of Illinois at Urbana Champaign,Urbana,Illinois 61801,USA;Center for Advanced Radiations Sources,University of Chicago,Chicago,Illinois 60637,USA;Center for High Pressure Science&Technology Advanced Research,Beijing 100094,China)

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China [3]Songshan Lake Materials Laboratory,Dongguan 523808,China [4]Shanghai Advanced Research in Physical Sciences,Shanghai 201203,China [5]Department of Geology,University of Illinois at Urbana Champaign,Urbana,Illinois 61801,USA [6]Center for Advanced Radiations Sources,University of Chicago,Chicago,Illinois 60637,USA [7]Center for High Pressure Science&Technology Advanced Research,Beijing 100094,China

出　　处：《Chinese Physics Letters》2023年第5期90-93,共4页中国物理快报（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.11921004);the National Key R&D Program of China(Grant Nos.2021YFA1401800 and 2022YFA1402301);Chinese Academy of Sciences(Grant No.XDB33010200);supported by the National Science Foundation Earth Sciences(EAR 1634415);used resources of the Advanced Photon Source,a U.S.Department of Energy(DOE)Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory(Grant No.DEAC02-06CH11357)。

摘　　要：We report experimental discovery of tantalum polyhydride superconductor.It was synthesized under highpressure and high-temperature conditions using diamond anvil cell combined with in situ high-pressure laser heating techniques.The superconductivity was investigated via resistance measurements at pressures.The highest superconducting transition temperature T_(c)was found to be~30 K at 197 GPa in the sample that was synthesized at the same pressure with~2000 K heating.The transitions are shifted to low temperature upon applying magnetic fields that support the superconductivity nature.The upper critical field at zero temperatureμ_0H_(c2)(0)of the superconducting phase is estimated to be~20 T that corresponds to Ginzburg-Landau coherent length~40 A.Our results suggest that the superconductivity may arise from 143d phase of TaH_(3).It is,for the first time to our best knowledge,experimental realization of superconducting hydrides for the VB group of transition metals.

关 键 词：HYDRIDE RESISTANCE SUPERCONDUCTIVITY 

分 类 号：O469[理学—凝聚态物理]