The heat capacity in Debye (θD) approximation at low temperatures of a one-dimensional monoatomic lattice is proportional to
(θD is Debye temperature)
1
\(\frac{T^2}{\theta_D}\)
2
\(\frac{T^3}{\theta_D}\)
3
\(\left( \frac{T}{\theta_D} \right)^3\)
4
\(\frac{T^4}{\theta_D}\)