The First Room-Temperature Ambient-Pressure Superconductor

For the first time in the world, we succeeded in synthesizing the room-temperature superconductor ($T_c \ge 400$ K, 127$^\circ$C) working at ambient pressure with a modified lead-apatite (LK-99) structure. The superconductivity of LK-99 is proved with the Critical temperature ($T_c$), Zero-resistivity, Critical current ($I_c$), Critical magnetic field ($H_c$), and the Meissner effect. The superconductivity of LK-99 originates from minute structural distortion by a slight volume shrinkage (0.48 %), not by external factors such as temperature and pressure. The shrinkage is caused by Cu$^{2+}$ substitution of Pb$^{2+}$(2) ions in the insulating network of Pb(2)-phosphate and it generates the stress. It concurrently transfers to Pb(1) of the cylindrical column resulting in distortion of the cylindrical column interface, which creates superconducting quantum wells (SQWs) in the interface. The heat capacity results indicated that the new model is suitable for explaining the superconductivity of LK-99. The unique structure of LK-99 that allows the minute distorted structure to be maintained in the interfaces is the most important factor that LK-99 maintains and exhibits superconductivity at room temperatures and ambient pressure.

Fast chargers every 60 km on key EU motorways

By 2028, there must be fast chargers at least every 60 km on the EU’s key mot

MTC and Transit Partners Now Accepting Applications for Youth Innovation Challenge

USPTO Implements Shorter Deadlines to Respond to Office Actions - Levin Ginsburg

On December 3, 2022, the USPTO is implementing shorter response times to most Office Actions as the last part of the Trademark Modernization Act. On or after that date, Office Actions issued during examination will have a three-month response period, instead of the current six months. This applies to applications based on actual use -