K. Alex Müller and Georg Bednorz found evidence for superconductivity in copper-oxide compounds at unexpectedly high temperatures. Their 1986 barium-lanthanum-copper-oxygen samples contained multiple phases and showed a large electrical resistivity drop with onset in the 30 kelvin range. The strong dependence on applied current and sample connectivity required cautious interpretation. This initial result redirected the search for high-temperature superconductors toward chemically complex oxides.[ref]
A solid-state physicist who carried out physics research at IBM.[ref]
Professional profile of Karl Alexander Müller. Independent professional identity
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Portrait of K. Alex Müller
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K. Alex Müller, or Klaus Alex Müller, is a Swiss physicist known for his groundbreaking work in the field of condensed matter physics, particularly in the study of superconductivity. He was awarded the Nobel Prize in Physics in 1987, alongside J. Georg Bednorz, for their discovery of high-temperature superconductors, which are materials that can conduct electricity without resistance at temperatures significantly higher than those previously known.