Comment on "Magnetic Breakdown at High Fields: Semiclassical and Quantum Treatments"

), (1)expected from the semiclassical description based on theLifshitz-Kosevich formula [2]. In this Comment we ar-gue that since the damping factor Eq.(1) is obtained forthe system with fixed chemical potential µ, it is not ap-propriate for the system with the fixed electron numberN, although the estimation of m