7. Superconductivity and Electronic and Magnetic Phenomena
7. Superconductivity and Electronic and Magnetic Phenomena Heading link
Superconductivity and Electronic and Magnetic Phenomena encompasses a variety of experimental and theoretical investigations into the remarkable changes in condensed matter in materials associated with increasing pressure, leading to novel materials and phenomena such as near-room temperature superconductivity, which was first observed by CDAC scientists in 2018 . Considerable progress has been made recently in this area of research, including both experimental studies of novel hydrides using synchrotron x-ray diffraction and infrared spectroscopy, as well as a variety of theoretical studies. In a collaboration with the University of Texas at Dallas, hole-doping by carbon was identified as responsible for the newly discovered room-temperature superconductivity observed in carbonaceous sulfur hydride . The equation of state of the material has now been determined using single-crystal x-ray diffraction to 180 GPa at HPCAT in a multi-laboratory collaboration led by UIC . Theoretical studies of new superconductors include CDAC particpation in the collaborative prediction of an alkali metal borosilicide that is metastable and superconducting at 1 atm . At FIS, CDAC-supported studies of novel magnetic and electronic materials include numerous investigations by CDAC collaborator Janice Musfelt (University of Tennessee) and her students using high-pressure synchrotron IR spectroscopy [5-7]. Activities in this area also include the UIC-led development and further refinement of diamond-anvil cells for measurements at multimegabar pressures in high magnetic fields in collaboration with a team at the NHMFL and former CDAC partner Yogesh Vohra [8-9]. Recently, a new mechanism for creating relatively high temperature superconductivity through the formation of stress-induced planar defects under pressure has been discovered in WB2 .
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