Superconductivity above 200 K discovered in superhydrides of calcium

Abstract Searching for superconductivity with T c near room temperature is of great interest both for fundamental science & many potential applications. Here we report the experimental discovery of superconductivity with maximum critical temperature ( T c ) above 210 K in calcium superhydrides, the new alkali earth hydrides experimentally showing superconductivity above 200 K in addition to sulfur hydride & rare-earth hydride system. The materials are synthesized at the synergetic conditions of 160~190 GPa and ~2000 K using diamond anvil cell combined with in-situ laser heating technique. The superconductivity was studied through in-situ high pressure electric conductance measurements in an applied…

• NS
  National Science Foundation

  Awards: EAR-1634415, 1634415, DE-AC02-06CH11357
• UD
  U.S. Department of Energy

  Awards: AC02-06CH11357, FG02-94ER14466, Contract No. DE-AC02-06CH11357, DE-FG02-94ER14466, DE-AC02, 06CH11357, DE-FG02-, No. DE-AC02-06CH11357, DE-AC02-06CH11357, DE-FG02, DE-AC02-
• UO
  University of Chicago

  Award: DE-AC02-06CH11357
• OO
  Office of Science

  Awards: DE-AC02-06CH11357, Contract No. DE-AC02-06CH11357, DE-FG02-94ER14466, DE-AC02, No. DE-AC02-06CH11357, 06CH11357, AC02-06CH11357
• NN
  National Natural Science Foundation of China-Yunnan Joint Fund
• AN
  Argonne National Laboratory

  Awards: DE-AC02, DE-FG02-94ER14466, No. DE-AC02-06CH11357, 06CH11357, AC02-06CH11357, Contract No. DE-AC02-06CH11357