Figure 5: Temperature dependence of the insulating gap measured by STS.
From: Atomically resolved spectroscopic study of Sr2IrO4: Experiment and theory
(a), Temperature dependence of scanning tunneling dI/dV spectra measured at the surface of Sr2IrO4 (averaged over an area of 100 nm × 100 nm by a grid spectroscopic mode with 20 × 20 sampling pixels, sample bias V = −50 mV, and feedback current I = 100 pA). The spectra are shifted for clarity. (b), Temperature dependence of the energy gap determined by the STS spectra. The blue dashed curve is the temperature dependence of the energy gap obtained by a phenomenological AF mean-field theory for comparison.
