A laureate of the Foundation for Polish Science solves a puzzle of the quantum spin Hall effect
A virtually exact Hall resistance quantization to a value reliant only on the Planck constant h and electron charge e in two-dimensional systems under strong magnetic fields not only demonstrated the role of topology in condensed matter physics but also played a crucial role in redefining S.I. units in terms of constants of nature in 2019. Furthermore, the accuracy of metrological relevance has also been achieved in the case of
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