<div dir="ltr"><div><div><div><div>Respected Users<br><br><br></div>I am applying GGA+U technique to considered compounds. In order to select proper value of U for specific material, I am changing the value of U from 2eV to 10eV with a step of 1eV. I was expecting that on increasing U value in the range 2-10eV, a value of U will appear where the corresponding band gap will start to decrease instead of increase. That value of U where the band gap start to decrease instead of rising will be the proper U value in the range 2-10eV.<br>
<br>I my case the, every time I am getting increasing band gap values on increasing U value from 2-10eV with a step of 1eV. Band gap does not decrease in the range 2-10eV. Should I increase the range ? May anyone suggest that whether my practice of finding U value is right ? If not how can I find proper value of U for specific compound ?<br>
<br></div>Thank you very much<br><br></div>Best Regards<br></div>Zaid<br></div>