It’s so clear when you break it down step-by-step! Do you have resources (books/chapters) that describe this process for a slightly more complicated system (say transition metal dichalcogenides, where you have 2 different types of atoms, and the unit cell considers *3* sub layers instead of 1?). I ask because this process seems to be a very intuitive way to link variations on crystal polymorph/phase (2H 1T 3R etc) to their phonon modes and electronic properties!
Yes, it is E2g as shown in the slides where I mentioned the excel sheet. Unfortunately, I wrote E1g in the last 2-3 slides of the presentation instead of E2g. Thanks for bringing it up. I've modified the presentation accordingly.
