| Dear Jibiao Li, We can reproduce the issue you are facing. We also tried fixing the atomic positions and converging only the Fermi energy, but we encountered the same problem. The primary cause lies in the atomic positions. The vacuum region on the right side of the structure is not sufficiently large. I included the calculation results with the corrected atomic positions in t1.in. Although the calculation has not been fully converged, the results show convergence in the correct direction. In t1.in, the entire system is moved so that the center of mass of the atoms in the unit cell is located at z = 0. Please note that when using the ESM method, the z-direction of the unit cell spans -Lz/2 < z < Lz/2. Therefore, the thickness of the left vacuum is determined by z(leftmost atom) - (-Lz/2), and the thickness of the right vacuum is Lz/2 - z (rightmost atom). Best regards, Minoru ====FCP convergence==== FCP: Fermi Energy = -0.502192 Ry ( -6.832675 eV) FCP: Fermi Energy = -0.467608 Ry ( -6.362127 eV) FCP: Fermi Energy = -0.440554 Ry ( -5.994036 eV) FCP: Fermi Energy = -0.440392 Ry ( -5.991837 eV) FCP: Fermi Energy = -0.437752 Ry ( -5.955921 eV) FCP: Fermi Energy = -0.433060 Ry ( -5.892082 eV) FCP: Fermi Energy = -0.431740 Ry ( -5.874118 eV) FCP: Fermi Energy = -0.429679 Ry ( -5.846083 eV) FCP: Fermi Energy = -0.429506 Ry ( -5.843728 eV) FCP: Fermi Energy = -0.430560 Ry ( -5.858067 eV) ~~~~skip~~~~ FCP: Fermi Energy = -0.430740 Ry ( -5.860521 eV) FCP: Fermi Energy = -0.430992 Ry ( -5.863939 eV) FCP: Fermi Energy = -0.432891 Ry ( -5.889781 eV) FCP: Fermi Energy = -0.434299 Ry ( -5.908933 eV) FCP: Fermi Energy = -0.435456 Ry ( -5.924675 eV) ====Force convergence==== Gradient error = 5.6E-01 Ry/Bohr Gradient error = 6.9E-01 Ry/Bohr Gradient error = 2.1E-01 Ry/Bohr Gradient error = 1.6E-01 Ry/Bohr Gradient error = 8.8E-02 Ry/Bohr Gradient error = 2.3E-01 Ry/Bohr Gradient error = 2.7E-02 Ry/Bohr Gradient error = 2.2E-02 Ry/Bohr Gradient error = 2.2E-02 Ry/Bohr Gradient error = 2.8E-02 Ry/Bohr ~~~~skip~~~~ Gradient error = 7.1E-03 Ry/Bohr Gradient error = 4.9E-03 Ry/Bohr Gradient error = 5.1E-03 Ry/Bohr Gradient error = 6.7E-03 Ry/Bohr Gradient error = 6.2E-03 Ry/Bohr |
t1.in
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