The phase diagram of magic-angle TBG consists of correlated insulator phases and superconducting phases, which can be realized via continuous tuning of temperature, magnetic field and carrier density.

Phase diagram of CuO (IMAGE) National Institute for Materials Science, Japan. Caption. When a cupric oxide compound is subjected to high pressure, its Cu–O–Cu bond angle widens, ...

Phase angle is the time delay between the voltage and the current waveform. There are a lot of details I glossed over. You probably don’t need to know how i is really the square root of ...