<div>Dear All,</div><div><br></div><div>According to the experiments, the material's ground state is afm and the band gap is ~2.30 eV in 4K. </div><div>In the magnetic field, the spin moments are aligned in the field direction (we call it "fm state") and the </div>
<div>band gap is ~2.34 eV. But from the calculation results, when U>=5 eV, the fm spin up gap is less </div><div>than that of afm state which is different from experimental results. (I guess we should choose spin </div>
<div>up gap to represent fm state gap since spin down gap is larger). From the calculated gap value, </div><div>U=8 eV is close to experimental results, but the gap in fm state is less. Please let me know what </div><div>
I can do to improve the results?</div>
<div><br></div><div><br></div><div>U afm gap fm spin up fm spin down </div><div>4 1.49 1.723 1.731 </div><div>5 1.81 1.77 2.01</div>
<div>6 1.922 1.912 2.273</div><div>8 2.265 2.076 2.634</div><br clear="all"><div><br></div>-- <br> Best Regards.<br> Peng <br>