Superconductivity with a twist
Argonne Distinguished Fellow and Division Director Michael Norman (MSD) has authored an article in the American Physical Society Journal Physics on superconductivity.
The discovery of superconductivity in a manganese-based “helical” magnet opens a new path to explore the relationship between superconductivity and magnetism.
Superconductivity and magnetism are typically antithetical forms of order. After all, in conventional superconductors, magnetic impurities are destructive to superconductivity as they break Cooper pairs. But the discovery in 1979 of so-called heavy fermion superconductivity, found near an antiferromagnetic phase, led to a shift in thinking on this subject. Since then, some of the most important classes of superconductors have been found in proximity to magnetism, including not only heavy-fermion superconductors, but also organic superconductors, cuprates, and iron-based superconductors.
About the Researcher
Michael Norman received his Ph.D. from Tulane University in 1983. He is currently an Argonne Distinguished Fellow and Director of the Materials Science Division at Argonne. He is also a PI in the Center for Emergent Superconductivity, a DOE Energy Frontier Research Center. Norman is a Fellow of the American Physical Society, was on the Editorial Board for Physical Review B, and has recently joined the Editorial Board of Physical Review X. In 2008 he was recognized as an Outstanding Referee by the American Physical Society. His interests, besides unconventional superconductors, include spin liquids, quantum criticality, and the interpretation of spectroscopic data.
Michael R. Norman, “Viewpoint: Superconductivity with a Twist,” Physics Article 8, 24, Published March 16, 2015.