Вышедшие номера
A new spin-polaron technique to treat the triangular-lattice antiferromagnet
Dong Z.N.1
1Department of Physics, Shanghai Jiao Tong University, Shanghai, China
Email: zh_dong@sjity.edu.cn
Поступила в редакцию: 15 марта 2007 г.
Выставление онлайн: 20 января 2008 г.

By expressing the Holstein-Primakoff transformation in a symmetric form a new spin-polaron technique for treating the triangular-lattice antiferromagnet is developed. With the technique, we have treated an extended t-J model, calculated the quasiparticle dispersion, and compared the dispersion with that obtained by other method. PACS: 74.20.-z, 71.27.+a, 75.30.Gw