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Solitary Bound State of Magnons and Lattice Deformation in an Anharmonic One‐Dimensional Ferromagnet
Author(s) -
Pushkarov Kh. I.,
Pushkarov D. I.
Publication year - 1979
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220930231
Subject(s) - anharmonicity , spins , ferromagnetism , magnon , excited state , bound state , physics , soliton , condensed matter physics , quantum , nonlinear system , coupling constant , quantum mechanics , lattice (music) , acoustics
The presence of excited spins in ferromagnetic systems can change the potential energy of interaction between atoms. In a ferromagnetic anharmonic linear chain the deformation formed and the spin excitations can create a bound state which can move along the chain with constant velocity without changing its shape. The quantum‐mechanical treatment of the problem leads to a nonlinear Schrödinger‐like equation with nonlinearity of third and fifth powers which has soliton solutions.