(1)The impurity, copper sulfide, is like a superconductor
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(2)German Max Planck Institute Pure LK-99 Crystal Is Insulated
(3)Source of pure LK-99 crystals synthesized by Max Planck Solid Laboratory in GermanyNature
(4)The world-renowned journal Nature published an article claiming that the LK-99 is a room-temperature atmospheric-pressure superconductor by Korean researchers, and that the impurity copper sulfide has the characteristic of looking like a superconductor
(5)Dan Garisto, a science journalist who published a skeptical article on LK-99 on the 4th, wrote this article in the Internet edition of Nature on the 16th local time
(6)Nature found evidence that the material was not a superconductor and revealed its actual properties. Nature said that the impurity of the material, especially copper sulfide, was caused by a sharp drop in electrical resistance similar to the characteristics of the superconductor
(1)Prashant Jane, a chemist at the Urbana-Champagne campus at the University of Illinois, said in a pre-released paper by Korean researchers that the resistance of LK-99 dropped from about 002 ohms per centimeter to 0002 ohms per centimeter, the same temperature at which copper sulfide made from impurities is phase transitioned Copper sulfide has a sharp drop in resistance below this temperature, which is almost the same as what LK-99 researchers claimed was a superconducting phase transition
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(2)Chinese Academy of Sciences physicist Jianlin Luo said that after experiments using different processes to synthesize different amounts of copper sulfide, the resistance of the sample, which was heated in the air to reach 70 levels, dropped sharply near 112 °C-385K, which was almost in line with what the Korean team observed
(3)Nature said many are convinced that LK-99 is not a room-temperature superconductor, but questions remain as to what the actual properties of the material are
(4)Among them, a research team at the Max Planck Solid Research Institute in Germany reported on the 14th that it succeeded in synthesizing pure single crystal LK-99 The researchers removed copper sulfide impurities using a technique called floating zone crystal growth The result was a pure LK-99 with transparent purple crystals, which were analyzed to be too high for standard conductivity tests as insulators with resistance of millions of ohms, rather than superconductors The research team concluded that it exhibits only some ferromagnetism and antimagnetism, but it is not likely to be superconducting
Nature Summary Due to the properties of copper sulfide, which is considered a powdery product during the manufacturing process
When the powdered copper sulfide was removed and ultra-pure LK-99, it became an insulator of millions of ohms
I’m going back and forth between cold and hot baths every day. No, not long I hope that the conclusion is clear