Anharmonic effects in magnetoelastic chains
arXiv:1104.1881 · doi:10.1103/PhysRevB.83.224406
Abstract
We describe a new mechanism leading to the formation of rational magnetization plateau phases, which is mainly due to the anharmonic spin-phonon coupling. This anharmonicity produces plateaux in the magnetization curve at unexpected values of the magnetization without explicit magnetic frustration in the Hamiltonian and without an explicit breaking of the translational symmetry. These plateau phases are accompanied by magneto-elastic deformations which are not present in the harmonic case.
5 pages, 3 figures
References in corpus (10)
- Electron and optical phonon temperatures in electrically biased graphene
- Extremely strong-coupling superconductivity and anomalous lattice properties in the beta-pyrochlore oxide KOs2O6
- Magnetic phase diagram of the S=1/2 antiferromagnetic zigzag spin chain in the strongly frustrated region: cusp and plateau
- Universal emergence of the one-third plateau in the magnetization process of frustrated quantum spin chains
- Quantum vs. Classical Magnetization Plateaus of S=1/2 Frustrated Heisenberg Chains
- Adiabatic-antiadiabatic crossover in a spin-Peierls chain
- Optical conductivity from local anharmonic phonons
- The spin-Peierls transition beyond the adiabatic approximation
- Electronic Instabilities in Shape-Memory Alloys
- Two-dimensional Hubbard Model in the presence of lattice distortions