Abstract: The electronic band structure of rhombohedral graphene multilayers hosts van Hove singularities at which the single particle of states diverges. I will discuss experiments in which we use electrostatic gates to tune the chemical potential through these singularities, revealing a cascade of correlated electron phases; notably, both singlet and triplet superconductors are observed proximal to or within generalized ferromagnetic phases where the system spontaneously polarizes into one or more of the spin- and valley isospin flavors. I will give an overview of this system, and describe recent experiments that reveal the role of intrinsic spin orbit coupling in graphene.
Speaker Bio: Dr. Andrea Young is a professor of Physics at the University of California Santa Barbara. His lab, the Young lab, combines nanofabrication and electronic measurement techniques in order to investigate the properties of electronic states in quantum materials, and is currently interested in the interplay between symmetry, topology, and correlations in low dimensional systems.
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2023-12-07T10:00:002023-12-07T11:00:00Magnetism and superconductivity in rhombohedral graphene multilayers: triplet superconductivity, intervalley coherence, and spin orbit coupling Event Information:
Abstract: The electronic band structure of rhombohedral graphene multilayers hosts van Hove singularities at which the single particle of states diverges. I will discuss experiments in which we use electrostatic gates to tune the chemical potential through these singularities, revealing a cascade of correlated electron phases; notably, both singlet and triplet superconductors are observed proximal to or within generalized ferromagnetic phases where the system spontaneously polarizes into one or more of the spin- and valley isospin flavors. I will give an overview of this system, and describe recent experiments that reveal the role of intrinsic spin orbit coupling in graphene.
Speaker Bio: Dr. Andrea Young is a professor of Physics at the University of California Santa Barbara. His lab, the Young lab, combines nanofabrication and electronic measurement techniques in order to investigate the properties of electronic states in quantum materials, and is currently interested in the interplay between symmetry, topology, and correlations in low dimensional systems.Event Location:
BRIM 311