标题： 一维铁磁畴壁由于与自由电子系统之间的双交换相互作用而发生形变 显示英文标题

标题： Deformation of a one dimensional ferromagnetic domain wall due to double exchange interaction with a free electron system

摘要： 使用S矩阵公式，我们评估了Bloch或Néel磁壁通过双交换相互作用与一维自由电子系统相互作用时的能量和电导率。总能量的最小化表明，当化学势大于磁相互作用时，畴壁通常变形为薄壁，而当磁场大于化学势时则趋向于宽壁。相反，对于双壁系统，变形总是趋向于宽壁。对于单个和双磁壁系统，电导率随着壁宽的减小而单调减少。在该原型模型中，Bloch和Néel磁畴壁的能量和电导率是相同的。 显示英文摘要

摘要： Using an S-matrix formulation we evaluate the energy and conductance of a Bloch or N\'eel magnetic wall interacting with a one dimensional free electron system via a double exchange interaction. Minimization of the total energy indicates that for chemical potential larger than the magnetic interaction the domain wall is generally deformed to a thin wall, while for magnetic field larger than the chemical potential tends towards wide walls. In contrast, for a double wall system the deformation is always towards wide walls. For the single as well as the double magnetic wall systems the conductance monotonically decreases with decreasing wall width. The energy and conductance are identical for Bloch and N\'eel magnetic domain walls within this prototype model.