In ARPES measurements, people say that the laser light cannot cover a wide area of momentum space whereas the synchrotron light can (M. Hashimoto et al., Nat. Phys. 10 (2014) 483). Why is that?
(Figure 3a in the paper is a combination of laser and synchrotron data to plot spectra along the Fermi surface from the nodal region to the antinodal region)
(Figure 3a in the paper is a combination of laser and synchrotron data to plot spectra along the Fermi surface from the nodal region to the antinodal region)
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