I started my Ph.D. in September 2019 from University-X under the supervision of Prof-A. The sole reason for me to start a Ph.D. under the supervision of this professor was that I was (still am) very excited to work in this research field.
In August 2019, when I had rejected all the other Ph.D. offers, Prof-A told me that he's planning to leave University-X in June 2020. He said he's not sure if he will leave or not, but he's just planning. He said that even if he leaves University-X, we will find a way to work together. I decided to join University-X because I really wanted to work with this professor, and also I thought maybe Prof-A will not leave this university.
In December 2019, Prof-A went to another university on sabbatical. In March (or April) 2020, he told me that there is a good chance that he will not come back to University-X. He gave me three choices,
- I find any other supervisor at University-X
- I work with him remotely (Skype/Zoom)
- I apply for any other Ph.D. position (including to his new university)
Option (1) is a clear no-go zone for me because there is no one else working on something related to my interests. I didn't choose Option (3) because I didn't want to leave this professor given that I had Option (2). I tried to find funding for a Ph.D. position at his new university but we couldn't find any appropriate source. All in all, Prof-A and I talked with another professor (Prof-B) at University-X and told him to take me as his student in official papers, however, my research supervisor will be Prof-A. Now, I am an official student of Prof-B but I do research under the supervision of Prof-A. (Pretty messed up!)
For the one last year, I am working remotely with Prof-A. We used to have one Skype meeting every 2 weeks until December 2020. Then I went on vacation for one month (yearly leave). Since my return in January 2021, I had only two meetings with Prof-A. The last meeting was on 19 March 2021. My work is completely stopped. I sent him some results but no reply to my emails. I am not able to find any help from any other professor at this university. I feel like I am just wasting my time here.
In my perspective, this guy, Prof-A is a really very nice person but I guess he's just too busy with his own projects and students at his new university. I don't blame him for anything
Now, finally, I am planning to leave this university and this professor, and search for another Ph.D. position. Is it a good plan? If yes, how should I tell everything to Prof-A and Prof-B? Of course, I will need recommendation letters from Prof-A and Prof-B. Also, I will have to give a justification for leaving this Ph.D. to find a new Ph.D. How should I write all this in my motivation letter/SOP for a new Ph.D.? Is it even possible to find a new Ph.D. after leaving one? Is not it a very bad point that the student could not complete what he was offered? I am so much confused.
(I am 27Y old now. My father really wanted me to get my Ph.D. before my 30, but I think now that's not possible.)
After @Lewian answer, I sent another email to Prof-A asking for more time. He said that he's willing to give more time but it's just that he's currently very busy with his kids (due to covid, schools are giving online classes and Prof-A helps his kids), and the new research projects that he started at his new University. It has been two weeks since I got this reply from him. And 3 months since I got any comments about my research update. The more days are passing, the more I am disliking myself and this University-X. I am expected to defend my PhD proposal by the end of this Summer semester (July 2021). I have put everything together, but I am not sure if the things that I am proposing are worth trying or doable.
(my field of study is theoretical/computational condensed matter physics. my focus is on transport properties of exotic magnetic phases)