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. 2021 Feb 19;12(8):2057–2063. doi: 10.1021/acs.jpclett.0c03579

Table 1. LDA and G0W0 Lowest Indirect and Direct QP Band Gap and Hole Effective Masses of Cubic Cs2AgBiBr6 at X (in Units of the Electron Rest Mass m0)a.

  QP band gap (eV)
hole effective mass (m0)
  X → L X → X mh1 mh2 mh3 mh*
DFT-LDA 0.90 1.67 0.79 0.73 0.17 0.36
G0W0@LDA 1.66 2.41 0.72 0.67 0.15 0.31
a

The indices correspond to principal axes of the effective mass tensor. mh3 corresponds to the hole effective mass along the direction from X to Γ. mh* is computed as the harmonic mean of the masses along the three principal components.