Spontaneous coherent phonons in the ground state of strong spin-phonon interaction
- 11 December 1973
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 6 (24) , 3557-3570
- https://doi.org/10.1088/0022-3719/6/24/016
Abstract
By the use of a simple model, the structure of the ground state of the strong spin-phonon interaction is studied. It is shown that the ground state of the system is very different from the state with no spin-phonon excitations. By second-order perturbation theory among degenerate states it is possible to see that the new ground state is populated by coherent running lattice waves associated to correlated spin waves. Some of the physical implications of this structure are discussed. It is suggested that the validity of the model is not limited to magnetoelastic problems.Keywords
This publication has 6 references indexed in Scilit:
- Ground state of the spin-phonon interactionJournal of Physics C: Solid State Physics, 1972
- Raman scattering and theoretical studies of Jahn—Teller induced phase transitions in some rare-earth compoundsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1972
- Dispersion curve for single-particle excitations in the paramagnetic spin phonon interactionJournal of Physics C: Solid State Physics, 1969
- Theory of spin-phonon coupling in concentrated paramagnetic salts and its effect on thermal conductivityProceedings of the Physical Society, 1967
- Thermodynamic effects of spin-phonon couplingProceedings of the Physical Society, 1967
- The Thermodynamics of Spins Coupled to LatticesProceedings of the Physical Society, 1963