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Magnon-lattice propagation in a Morse chain: the role played by the spin-lattice interaction and the initial
Marconi Silva Santos Junior1, Messias DE Oliveira Sales2, Francisco Anacleto Barros Fidelis DE Moura1
1Universidade Federal de Alagoas, Instituto de Física, Av. Lourival Melo Mota, s.n, Tabuleiro do Martins, 57072-900 Maceió, AL, Brazil.
Abstract:
Our research focuses on studying magnon dynamics in a Morse lattice. We used a Heisenberg Hamiltonian to represent the spins while a Morse formalism governed the lattice deformations. The strength of the spin-spin interaction depended on the distance between neighboring spins, which followed an exponential pattern. We explored various initial conditions for the lattice and spin wave function and observed how they affected the magnon-lattice propagation. Additionally, we analyzed the impact of the parameter that controlled the difference in time scales between spin and lattice deformation propagation.
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