- 著者
-
Nakano Takashi
Fukuyama Hidetoshi
- 出版者
- 一般社団法人日本物理学会
- 雑誌
- Journal of the Physical Society of Japan (ISSN:00319015)
- 巻号頁・発行日
- vol.50, no.8, pp.2489-2499, 1981-08-15
- 被引用文献数
-
1
111
Our previous calculations of the lattice distortion and the formation energy ofa soliton in the one-dimensional antiferromagnetic Heisenberg spin-Peierlssystems are refined and extended to the case of X Y-Z model. The spin degree offreedom are represented by the phase Hamiltonian with the help of boson repre-sentation of fermions introduced by the Jordan-Wigner transformation. Parame-ters in this phase Hamiltonian are adjusted so that spin wave velocity and exponentof correlation function agree with exact results. This adjustment is shown togive also exact spin susceptibility in the absence of lattice distortion. Based onthis phase Hamiltonian of the X Y-Z model localized excitations (solitons) inthe presence of lattice distortions are examined in details including the width,the formation energy and the magnetic field dependence.