Heike Kamerlingh Onnes was a Dutch physicist who is best known for his pioneering work in superconductivity. He discovered superconductivity in 1911 while experimenting with mercury at low temperatures, leading to the observation that mercury's electrical resistance dropped to zero below a certain critical temperature. This groundbreaking discovery laid the foundation for the study of superconductivity and influenced many subsequent theories and experiments, including the development of the London Theory.
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