Dual character of the cuprate strange metal

In this presentation, I describe my group’s recent studies of the (magneto)transport properties of hole-doped cuprates across the strange metal regime in high magnetic fields up to 70 Tesla. Focussing on three distinct families of hole-doped cuprates - Tl2Ba2CuO6+δ, La2-xSrxCuO4 and La/Pb-doped Bi2Sr2CuO6+δ – a common picture emerges of two charge sectors coexisting within the strange metal phase of overdoped cuprates, one containing coherent Landau quasiparticles, the other incoherent `Planckian' dissipators. Curiously, as the contribution from the latter grows with reduced doping, so too does the superconducting condensate. Finally, a link is established between the quadrature scaling of the magnetoresistance at high field strengths and the so-called separation of lifetimes seen at low-fields.