Unstable metals provide a new way to study superconductivity

The Ames Laboratory of the U.S. Department of Energy discovered and described a unique disordered electron spin state that exists in metals. This state may provide a unique way to find and study unstable magnets. Condensed matter physicists use the term 'unstable' to describe a magnet whose spin is inconsistent with a stable magnetic order. These ultra-unstable magnet materials, called spin liquids, still have disordered magnetism even at extremely low temperatures, and their unique properties are of great help to the development of quantum computing and high-temperature superconductivity. In order to find this very unstable magnetic state, the material studied is usually an insulator. However, researchers in the Ames laboratory found this unstable state in a metal material with a molecular formula of CaCo1.86As2. Rob McQueeney, a scientist in the Ames Laboratory, said: 'This unstable system with an indeterminate magnetic state is difficult to find at the beginning, but it is even more difficult to find in metal.' In an insulated magnet, it leads to an unstable state of self. The interaction between spins is determined by the crystal structure of the crystal lattice, and this interaction is relatively constant. The discovery of this nearly unstable metal provides a new way to repair the magnetic interaction to achieve a completely unstable state. 'Here, we have a small handle that can be adjusted. We know that some of the interactions that cause instability are carried out by conducting electrons, and we can precisely adjust these interactions, maybe you will get a superconductor, maybe you will get Some other new quantum states. We have many choices' article from rdmag, the original title is'Perfectly Frustrated' Metal Provides Possible Path to Superconductivity, compiled by Material Science and Technology Online.