What happens at the zone boundaries of the brillouin zones in the tight binding model? How does the band gap originate in the TB model?
Effective mass of a Bloch electron in a periodic potential is negative why ?
Is there any phase transition occur in paramagnetism to diamagnetism transitions state. What should be the order and how will I calculate the order?
A very rough approximation from first principles, from the elementary charge and hbar, would suffice. But is there such an approximation at all? (Alternatively, if water is too difficult: is there ...