Fast Technology reported on January 11 that ultra-low temperature refrigeration is one of the key core technologies that need to be overcome in the field of scientific research in China.
A few days ago, Nature published the latest research results of Su Gang, a professor at the University of Chinese Academy of Sciences, Li Wei, a researcher at the Institute of Theoretical Physics of the Chinese Academy of Sciences, Sun Peijie, a researcher at the Institute of Physics of the Chinese Academy of Sciences, and Jin Wentao, an associate professor at Beijing University of Aeronautics and Astronautics.
Recently, the research team has achieved an important breakthrough in the basic research of ultra-low temperature refrigeration without liquid helium, providing a solution to the problem of helium shortage in China.
A supersolid state is a type of ultra-solid state that is close to absolute zero (0 open, minus 273.).15 degrees Celsius).
According to ** report, in this study, Chinese researchers discovered for the first time a novel state of matter called "spin supersolid" in a cobalt-based triangular lattice quantum magnetic material, and obtained experimental evidence of its existence.
Subsequently, researchers used the material to obtain 94 millimeters through the adiabatic demagnetization process, realizing liquid helium-free ultra-low temperature refrigeration, and named the effect "spin supersolid giant magnetic card effect".
According to reports, the future work goal of the scientific research team is to continue to break through the limit of extremely low temperature, and build a helium-free ultra-low temperature refrigerator in the future.
Cryogenic refrigerators can provide an extremely low temperature operating environment close to absolute zero for superconducting quantum computers, and are widely used in cutting-edge technologies such as condensed matter physics, materials science, and deep space exploration.