Georg Rieger (rieger@phas.ubc.ca) and Brett Gladman (gladman@astro.ubc.ca)
All are welcome to this in-person event!
Event Information:
Abstract:
Over the past two decades, condensed matter physicists have steadily mastered the isolation and control of two-dimensional van der Waals materials. These systems host a broad range of intriguing new quantum phases, enabling studies of unconventional superconductivity and strongly correlated states. Much of this progress has been driven by moiré superlattices, formed by stacking and twisting atomically thin crystalline sheets. These materials can feature flat electronic bands with strong Coulomb interactions, often giving rise to emergent collective states with exotic topological properties. I will first discuss scanning tunneling microscopy experiments that probe the microscopic origins of topological states in twisted 2D semiconductors. Then, I will present electrical transport measurements in various graphene-based moiré systems revealing topological crystals of electrons and their interplay with competing states featuring fractionally charged quasiparticles. These systems are poised to become a focus of intensive study in the coming years due to their wealth of correlation-driven topological physics and their potential applications in future quantum devices.
Bio:
Matthew Yankowitz is an Associate Professor of Physics and Materials Science & Engineering at the University of Washington. His research in experimental condensed matter physics focuses on the investigation and control of strong correlations, magnetism, superconductivity, and topology in two-dimensional van der Waals heterostructures, probed using a combination of electrical transport and scanning tunneling microscopy. Prior to joining the University of Washington, he was a postdoctoral researcher at Columbia University and received his Ph.D. in Physics from the University of Arizona. He is the recipient of an ARO Young Investigator Award (2020), an NSF CAREER Award (2021), the Lee Osheroff Richardson Science Prize from Oxford Instruments (2021), and the IUPAP Young Scientist Prize in Low Temperature Physics (2022).
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2024-10-03T16:00:002024-10-03T17:00:00New twists on topology in moiré quantum matterEvent Information:
Abstract:
Over the past two decades, condensed matter physicists have steadily mastered the isolation and control of two-dimensional van der Waals materials. These systems host a broad range of intriguing new quantum phases, enabling studies of unconventional superconductivity and strongly correlated states. Much of this progress has been driven by moiré superlattices, formed by stacking and twisting atomically thin crystalline sheets. These materials can feature flat electronic bands with strong Coulomb interactions, often giving rise to emergent collective states with exotic topological properties. I will first discuss scanning tunneling microscopy experiments that probe the microscopic origins of topological states in twisted 2D semiconductors. Then, I will present electrical transport measurements in various graphene-based moiré systems revealing topological crystals of electrons and their interplay with competing states featuring fractionally charged quasiparticles. These systems are poised to become a focus of intensive study in the coming years due to their wealth of correlation-driven topological physics and their potential applications in future quantum devices.
Bio:
Matthew Yankowitz is an Associate Professor of Physics and Materials Science & Engineering at the University of Washington. His research in experimental condensed matter physics focuses on the investigation and control of strong correlations, magnetism, superconductivity, and topology in two-dimensional van der Waals heterostructures, probed using a combination of electrical transport and scanning tunneling microscopy. Prior to joining the University of Washington, he was a postdoctoral researcher at Columbia University and received his Ph.D. in Physics from the University of Arizona. He is the recipient of an ARO Young Investigator Award (2020), an NSF CAREER Award (2021), the Lee Osheroff Richardson Science Prize from Oxford Instruments (2021), and the IUPAP Young Scientist Prize in Low Temperature Physics (2022).
Learn More:
See Matthew's lab here
View his University of Washington faculty page: Matthew Yankowitz | Department of Physics | University of Washington
Event Location:
HENN 201
