However, the relative atomic displacements Δ d showed a decreasing trend from 0.31 Å to 0.00 Å as the atomic number of the group-IV species increased, so that the monolayer PbTe (with Δ d = 0.00 Å) formed in an ideal NaCl-type structure.
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However, the relative atomic displacements Δ d showed a decreasing trend from 0.31 Å to 0.00 Å as the atomic number of the group-IV species increased, so that the monolayer PbTe (with Δ d = 0.00 Å) formed in an ideal NaCl-type structure.