Fig. 3.

Charge transport and magnetoresistance of K₃Fe₂[PcFe–O₈]. a Variable-temperature electrical conductivity of compressed K₃Fe₂[PcFe–O₈] pellets via van der Pauw method; Insert: Plot of electrical conductivity of K₃Fe₂[PcFe–O₈] as a function of inverse temperature (T⁻¹); b Room-temperature photoconductivity of K₃Fe₂[PcFe–O₈] measured by optical pump-THz probe spectroscopy (800 nm excitation wavelength 300 μJ cm⁻² and ~1 THz bandwidth probe; under nitrogen environment). Red line represents a bi-exponential decay function; c Real (black dots) and imaginary (red dots) components of the frequency-resolved complex conductivity (measured at 0.5 ps after photoexcitation, DC conductivity 0.14 S m⁻¹); solid lines represent a Drude-Smith description of the data; d, Magnetic field dependence of the magnetoresistance by measuring the changes of the electrical resistance in an applied field (−6–6 T) at different temperatures