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Idaho National Laboratory has identified a rare topological Kondo insulating state in plutonium hexaboride, where electrical current flows freely on surfaces while being blocked in the interior. This discovery highlights the complex 5f electron dynamics of actinides and could redefine fundamental models in nuclear materials science. For researchers, this opens new avenues for studying quantum correlations and topological properties in heavy-element compounds.

Source coveringQuantum Zeitgeist

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INL Details Plutonium’s Unique Electrical Conductivity on Surfaces

Quantum ZeitgeistJune 6, 20264 min read

Idaho National Laboratory (INL) research details how plutonium hexaboride exhibits a rare topological Kondo insulating state.

Scientists at the Idaho National Laboratory (INL) have discovered a unique electrical behavior in plutonium hexaboride (PuB₆), revealing a “topological Kondo insulating state”, a quantum property observed in only a handful of plutonium materials to date. Unlike most materials, this compound allows electrical current to flow freely along its exterior surfaces while blocking it within its interior, a characteristic of topological insulators with unusually strong conductivity. First synthesized and isolated in 1940 by scientists at the University of…

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