Intrinsic Localized Modes in an Order-parameter-preserving Antiferromagnet

Wuming LIU+;Shaoyun FU;Benlian ZHOU, International Centre for Materials Physics, Institute of Metal Research, Academia Sinica, Shenyang, 110015, China

摘 要：<正> Intrinsic localized modes in an order-parameter-preserving antiferromagnet are investigated withemploying 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：