The Chern number of a 2D p_x+ip_y superconductor equals -n(Gamma) + 2 n(X) - n(M), a combination of ARPES-measurable electron occupations at three high-symmetry points.
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Geometrical approach and topological electron density in the $p_x + ip_y$ superconductor
The Chern number of a 2D p_x+ip_y superconductor equals -n(Gamma) + 2 n(X) - n(M), a combination of ARPES-measurable electron occupations at three high-symmetry points.