论文标题
自旋转移扭矩驱动的内部局部旋转激发，在存在磁场状扭矩的情况下
Spin-transfer torque driven intrinsic localized spin excitations in the presence of field-like torque
论文作者
论文摘要
我们研究了在垂直和平行的外部磁场的存在下，在海森堡一维铁磁自旋链中存在固有的局部局部化激发，并且具有自旋转移扭矩和类似场的扭矩。在没有现场各向异性的情况下，可以完全求解一种旋转激发，以求解与垂直的田间旋转的激发，并且与链条平行。我们通过适当地引入电流以及在垂直和平行场的情况下，由于场状和平行场而引起的振荡的振荡频率来清除自旋激发中的阻尼。通过与数值对应物匹配来验证分析结果的确切性。此外，我们从数值上证实存在两种自旋渗透的相位和反相稳定同步振荡，在存在垂直场和磁场样扭矩的电流的情况下存在两种旋转振荡。
We study the existence of intrinsic localized one-spin excitation in the Heisenberg one-dimensional ferromagnetic spin chain in the presence of perpendicular and parallel external magnetic fields and current with spin-transfer torque and field-like torque. The Landau-Lifshitz-Gilbert-Slonczewski(LLGS) equation is exactly solved for the one spin excitation in the absence of onsite anisotropy for the excitations of spin with fields perpendicular and parallel to the chain. We show the removal of damping in the spin excitations by appropriately introducing current and also the enhancement of angular frequency of the oscillations due to field-like torque in the case of both perpendicular and parallel field. The exactness of the analytical results is verified by matching with numerical counterparts. Further, we numerically confirm the existence of in-phase and anti-phase stable synchronized oscillations for two spin-excitations in the presence of current with perpendicular field and field-like torque.
