Phonon Heat Capacity: Einstein & Debye Models Explained"

PHONOS
HEAT
CAPACITY

,COURSE TITLE: SOLID STATE PHYSICS
SUB TITLE: PHONONS HEAT CAPACITY
COURSE CODE: PHY
REPRESENTED BY: SHAHID NAWAZ
REPRESETED TO: MAM MARYAM

, OUTLINES
 Introduction
 Phonons and Heat Capacity
 Classical Heat Capacity (Dulong-
Petit Law)
 Quantum Approach
 Debye Model
 Einstein Model
 Experimental Observations
 Applications
 Conclusion

, PHONOS

phonons is a collective
oscillation of several atoms
in condence matter physics
a phonon is a unit of viration
energy that arises from
oscillating atoms with in a cr
lattice

, Phonons and Heat Capacity
•Heading: Role of Phonons
• Phonons: Quantized vibrations of atoms in a crystal
lattice.
• Energy is stored in these vibrations, influencing
heat capacity.