Bilayer graphene's second-order nonlinear conductivity reverses sign at Lifshitz transitions, offering a new zero-magnetic-field probe of Fermi surface topology.
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Detecting Lifshitz Transitions Using Nonlinear Conductivity in Bilayer Graphene
Bilayer graphene's second-order nonlinear conductivity reverses sign at Lifshitz transitions, offering a new zero-magnetic-field probe of Fermi surface topology.