Guoqing GU+
,
International Centre for Materials Physics
,
Academia Sinica
,
110015
,
Shenyang
,
ChinaGe CHEN
,
College of Systems Science and Systems Engineering
,
Shanghai Institute of Mechanical Engineering
,
200093
,
ShanghaiK.W.Yu
,
Department of Physics
,
Chin
材料科学技术（英）
We build the perturbation expansion method for nonlinear composite media and extend the EMA for nonlinear effective conductivity. Using the solutions of boundary-value problems of a cylindrical in- clusion, we derive formulae for nonlinear effective conductivity.
关键词:
effective medium approximation
,
null
Wuming LIU+
,
Shaoyun FU
,
Benlian ZHOU
,
International Centre for Materials Physics
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
110015
,
China
材料科学技术（英）
Intrinsic localized modes in an order-parameter-preserving antiferromagnet are investigated with employing the Dyson-Maleev transformation and the coherent-state ansatz. These modes which be- low the magnon frequency band correspond to a local large-angle, low-frequency precessional mo- tion of spins, quantum states of which are characterized by the indefiniteness of the number of rele- vant magnons.
关键词:
intrinsic localized mode
,
null
,
null
