Wuming LIU and Benlian ZHOU(International Centre for Materials Physics
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
110015
,
China)Liming GUO(Dept. of Mathematics
,
Institute of Yunnan Nationality
,
Xunming
,
650031
,
China)
材料科学技术(英文)
Introducing the Dyson-Maleev transformation. the coherent state ansatz and the time-dependent variation principle, we obtain two partial different equations of motion from Hamiltonian. Employing the method of multiple scales. we reduce these equations into the envelope...
关键词:
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(英文)
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-frequenc...
关键词:
intrinsic localized mode
,
null
,
null
Journal De Physique Iv
The disordered systems are of fractal structures. Alexander and Orbach showed that the vibrational density of states for fractal nets follow. the universal law:D(omega) similar to omega(2-:) where d is the spectral (fracton) dimensionality;d=4/3 for any Euclidean dimen...
关键词:
fractons