Determine the carrier type in ambient-pressure BaFe2Se3

Determine whether charge transport in the ambient-pressure Mott-insulating state of BaFe2Se3 is hole-dominated or electron-dominated, thereby establishing the relevant carrier type independently of pressure-induced metallic-phase measurements.

Background

The paper discusses transport anisotropy in BaFe2Se3 using semiclassical Boltzmann calculations at representative hole- and electron-doping energies. Because the absolute carrier type in the ambient-pressure Mott-insulating phase has not been experimentally established, the authors use evidence from the pressure-induced metallic phase, where Hall measurements indicate hole-dominant transport, as a reference for interpreting the calculated conductivity.