论文标题
超越单磁和双磁力的新型磁激发
Novel magnetic excitations beyond the single- and double-magnons
论文作者
论文摘要
传统的智慧表明，一个带有一个单位角动量的光子最多可以改变具有一个单位（Delta MS = +-1）的磁系统的旋转角动量。这意味着两个光子散射过程可以用最大两个单元操纵磁系统的旋转角动量。在这里，我们通过使用谐振非弹性X射线散射研究了α-FE2O3的镁谱，研究了角动量的光子驱动转运的基本极限。我们发现了一系列高级磁棒，上面载有双重，三重，四倍，并使单块旋转角动量旋转角动量。在理论计算的指导下，我们揭示了两光子散射过程如何创建异国情调的高镁元音，以及这些准粒子在基于木元的应用方面的相关性。
Conventional wisdom suggests that one photon that carries one unit of angular momentum can change the spin angular momentum of a magnetic system with one unit (delta Ms = +-1) at most. This would imply that a two-photon scattering process can manipulate the spin angular momentum of the magnetic system with a maximum of two units. Here we examine the fundamental limit of the photon-driven transport of angular momentum by studying the magnon spectrum of α-Fe2O3 using resonant inelastic x-ray scattering. We discovered a cascade of higher-rank magnons carrying double, triple, quadruple, and quintuple the spin angular momentum of a single-magnon. Guided by theoretical calculations, we reveal how a two-photons scattering process can create exotic higher-rank magnons and the relevance of these quasiparticles for magnon-based applications.
