While studying a compound made of the elements cerium- rhodium-indium, researchers at Los Alamos National Laboratory and the University of Illinois at Urbana-Champaign have discovered that a magnetic state can coexist with superconductivity in a specific temperature and pressure range. The discovery is a step toward a deeper understanding of how Nature is organized in regimes ranging from the fabric of the cosmos to the most fundamental components of elementary particles.
In research published recently in the scientific journal Nature, Los Alamos scientists Tuson Park, Joe D. Thompson, and their colleagues describe the discovery of hidden magnetism in the CeRhIn5 compound. In studying the compound, researchers found that a purely unconventional superconducting phase is separated from a phase of coexisting magnetism and unconventional superconductivity, with the boundary between these two phases controlled by the laws of quantum physics.
Unconventional superconductors are materials that exhibit superconductivity, a complete absence of electrical resistance under cold temperatures, but use exotic mechanisms. Conventional wisdom has long held that the magnetism is excluded as materials change phases, but the researchers now show that it is merely hidden by unconventional superconductivity and can be made to reappear in the presence of an applied magnetic field.
Todd Hanson | EurekAlert!
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