Solitary magnon localization in antiferromagnet KCuF<sub>3</sub>
Wu-Ming Liu; Guan-Hu He; Ben-Lian Zhou; Wu-Ming Liu; International Center for Material Physics, Academia Sinica, Shenyang 110015, China; CCAST (World Laboratory), P.O. Box 8730, Beijing 8730, China; Institute of Metal Research, Academia Sinica, Shenyang 110015, China; Guan-Hu He; International Center for Material Physics, Academia Sinica, Shenyang 110015, China; CCAST (World Laboratory), P.O. Box 8730, Beijing 8730, China; Institute of Metal Research, Academia Sinica, Shenyang 110015, China; Ben-Lian Zhou; International Center for Material Physics, Academia Sinica, Shenyang 110015, China; CCAST (World Laboratory), P.O. Box 8730, Beijing 8730, China; Institute of Metal Research, Academia Sinica, Shenyang 110015, China
Журнал:
Physica Scripta
Дата:
1994-10-01
Аннотация:
Using the Holstein-Primakoff transformation, the coherent state ansatz and the time-dependent variational principle, we obtain the two partial differential equations of motion from the Hamiltonian. Employing the method of multiple scales, we reduce these equations into the envelope function equation and force the amplitude function to satisfy a nonlinear Schrödinger equation. Introducing the inverse-scattering transformation, we get the single soliton solution and investigate solitary magnon localization in antiferromagnet (AFM) KCuF<sub>3</sub>.
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