Fig. 3: Temperature-dependent ARPES measurements.
From: Charge doping into spin minority states mediates doubling of TC in ferromagnetic CrGeTe3
a ARPES measurements around the Γ point (hν = 48eV) for a CrGeTe3 sample with carrier density N = 3.1 × 1013 cm−2, as a function of temperature, with the relevant states highlighted by red arrows. b Corresponding temperature-dependant EDCs extracted at Γ. c Extracted temperature-dependent separation of the Cr-Te hybridised state from the Te 5p valence band maximum (see arrows in (a) and (b)). Grey and black dashed lines represent an estimated baseline and a 10% rise from that baseline. Approximate values for TC are given by the intersection of each data set with the black dashed line, indicated by the coloured arrows. The magnetic TC for pristine CrGeTe3 is also shown, and the corresponding temperature-dependent band shifts are shown inset, reproduced from Ref. 16. d Experimental phase diagram, plotting the extracted TC estimates as a function of doping along with estimates from transport measurements from Ref. 9.
