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Researchers in the US say that they have made the best 3D topological insulator to date. The material is called bismuth antimony tellurium selenide (BiSbTeSe2) and could be of fundamental importance for testing a number of condensed-matter and particle-physics theories. The material could also find use in spintronics devices and be used to build robust topological quantum bits (qubits) for quantum computers.

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