Reconciling Hall effect and ARPES in the normal state of cuprate strange metals

The anomalous transport properties of high-T_c cuprates, including its ubiquitous T-linear resistivity, continue to defy understanding, a situation exacerbated by conflicting results. High-field Hall effect measurements on two distinct families – Tl₂Ba₂CuO_6+δ and Pb/La-doped Bi₂Sr₂CuO_6+δ (Bi2201) - found that the effective Hall number exhibits a gradual crossover from p transport-active carriers – a ‘small’ Fermi surface (FS) – to 1+p – a ‘large’ FS – over a broad doping range that extends beyond p^* [Nat. Phys. 17 826 (2021)]. By contrast, ARPES measurements reveal a large FS for all p >p*. In the present talk, we describe our search for possible spectroscopic fingerprints of the observed p →1+p crossover within the strange metal regime beyond p* through analysis of normal state ARPES data from the same Bi2201 samples as those reported in the above reference. Specifically, we identify signs of increasing incoherence in the antinodal FS regions as p decreases towards p*.