Antiferromagnets at low Temperatures
arXiv:1101.2919 · doi:10.1063/1.3622710
Abstract
The low-temperature properties of the Heisenberg antiferromagnet in 2+1 space-time dimensions are analyzed within the framework of effective Lagrangians. It is shown that the magnon-magnon interaction is very weak and repulsive, manifesting itself through a term proportional to five powers of the temperature in the pressure. The structure of the low-temperature series for antiferromagnets in 2+1 dimensions is compared with the structure of the analogous series for antiferromagnets in 3+1 dimensions. The model-independent and systematic effective field theory approach clearly proves to be superior to conventional condensed matter methods such as spin-wave theory.
Presented at 12th Mexican Workshop on Particles and Fields, Mazatlan, Sinaloa, Mexico, 9-14 Nov 2009
Cited by in corpus (4)
- Low-Temperature Properties of Two-Dimensional Ideal Ferromagnets
- Thermodynamics of Two-Dimensional Ideal Ferromagnets - Three-Loop Analysis
- Low-Temperature Properties of Ferromagnetic Spin Chains in a Magnetic Field
- Thermodynamics of Ferromagnetic Spin Chains in a Magnetic Field: Impact of the Spin-Wave Interaction