hole bands are renormalized by a factor of $\sim$3. When such kind of orbital-dependent renormalization is considered for the bands at X, it would bring the [$d_{xy}$]{} electron band to be shallower than the [$d_{xz}$/$d_{yz}$]{} electron bands, which is more consistent with the assignment of the shallower electron band to [$d_{xy}$]{}. Further support for this assignment comes from the general consideration that a stronger mass renormalization would imply a stronger temperature dependence of the corresponding quasiparticle spectral weight, as has been shown in the main text.

To summarize, while the possibility in principle exists for other unknown mechanisms and alternative explanations, given the totality of the observations and considerations given above, the understanding of the shallow electron band as [$d_{xy}$]{} seems to be the most consistent overall.

Temperature cycle test
----------------------

To test that the disappearance of the [$d_{xy}$]{} orbital spectral weight with raised temperature is not due to sample aging, we have performed a temperature cycle test in which we cleaved the sample at 10K and took measurements as temperature is raised up to 300K and cooled back down again. Spectra images for selected temperatures as well as the EDC at X point in this temperature cycle are shown 