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Destabilized metals offer new avenues for superconductivity research

by：GESTER Instruments 2022-10-16

The U.S. Department of Energy's Ames Laboratory has discovered and described a unique state of disordered electron spins in metals that may provide a unique avenue for finding and studying unstable magnets. condensed matter physicists“unstable”The term to describe a magnet whose spin does not align with a stable magnetic order. These ultra-unstable magnet materials, called spin liquids, exhibit disordered magnetism even at extremely low temperatures, and their unique properties could greatly aid the development of quantum computing and high-temperature superconductivity. Materials studied to find this very unstable magnetic state are usually insulators. But researchers in the Ames lab found this unstable state in a metallic material with the molecular formula CaCo1.86As2. Ames Lab scientist Rob McQueeney said:“Such unstable systems with undetermined magnetic states are hard to find at first, and even harder to find in metals.”In insulating magnets, the inter-spin interactions that lead to instability are determined by the crystal structure of the lattice and are relatively invariant. The discovery of this near-destabilized metal provides new avenues for tinkering with magnetic interactions to achieve complete instability.“Here, we have a small handle that can be adjusted. We know that some of the interactions that lead to destabilization are through conduction electrons, and we can tune those interactions precisely, maybe you'll get a superconductor, maybe you'll get some other new quantum state. we have many options”The article comes from rdmag, the original title is'Perfectly Frustrated' Metal Provides Possible Path to Superconductivity, compiled by Material Science Online.