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- W3148221028 abstract "Abstract Searching for superconductivity with Tc near room temperature is of great interest both for fundamental science & potential applications. Here we report the experimental discovery of superconductivity with maximum critical temperature(Tc) above 210 K in calcium superhydrides, the third type hydride experimentally showing superconductivity above 200K in addition to sulfur hydride & rare earth hydride system. The materials are synthesized at the synergetic conditions of 160~190 GPa and ~2000K using diamond anvil cell combined with in-situ laser heating technique. The superconductivity was studied through in situ high pressure resistance measurements in applied magnetic field for the sample quenched from high temperature while maintained at the synthesized pressure. The upper critical field was estimated to be ~268T while the GL coherent length is ~11 Å. The in situ x ray diffractions with synchrotron suggest that the synthesized calcium hydrides are primarily composed of CaH6 while there also exist other calcium hydrids with different hydrogen." @default.
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- W3148221028 date "2021-12-09" @default.
- W3148221028 modified "2023-10-02" @default.
- W3148221028 title "Superconductivity above 200K Observed in Superhydrides of Calcium" @default.
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- W3148221028 doi "https://doi.org/10.21203/rs.3.rs-1126263/v1" @default.
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