Date of Original Version
A scaling form for the logarithm of the partition function suitable for a zero-temperature critical point is obtained and found to hold for the spherical model in less than two dimensions and the classical n-component Heisenberg linear chain. Nevertheless, several cases are found where the critical-exponent relations involving the specific heat fail. These anomalous cases do not imply a breakdown of the scaling implicit in the basic formulation of renormalization-group theory.
George A. Baker, Jr. and Jill C. Bonner Scaling behavior at zero-temperature critical points Phys. Rev. B 12, 3741 (1975)
Available at: http://dx.doi.org/10.1103/PhysRevB.12.3741