论文标题
通过超导冷凝物和准颗粒对抗磁镁的重新归一化
Renormalization of antiferromagnetic magnons by superconducting condensate and quasiparticles
论文作者
论文摘要
修改和调整自旋波散的能力是宏伟网络工程的最重要要求之一。在这项研究中，我们证明了由抗铁磁绝缘子（AF）组成的合成薄膜杂种以及正常（N）或超导（S）金属来调谐和修饰抗毒磁绝缘体中的自旋波分散体。关键成分是在AF/S（N）界面处的无补偿磁矩，该磁矩通过界面交换相互作用诱导相邻金属中的有效交换场。交换场旋转使金属中的准粒子偏振，并诱导拼写的三胞胎库珀对筛选磁化。准粒子和库珀对极化将木剂分散率重新归一致。重新归一化导致否则退化的AF镁模式的分裂而无需施加磁场。还提出，重新归一化的分散关系的测量值可以提供AF在相邻金属中引起的有效交换场的幅度。
The ability to modify and tune the spin-wave dispersion is one of the most important requirements for engineering of magnonic networks. In this study we demonstrate the promise of synthetic thin-film hybrids composed of an antiferromagnetic insulator (AF) and a normal (N) or superconducting (S) metal for tuning and modifying the spin-wave dispersion in antiferromagnetic insulators. The key ingredient is the uncompensated magnetic moment at the AF/S(N) interface, which induces an effective exchange field in the adjacent metal via the interface exchange interaction. The exchange field spin polarizes quasiparticles in the metal and induces spinful triplet Cooper pairs screening the magnon. The quasiparticle and Cooper pair polarization renormalizes the magnon dispersion. The renormalization results in the splitting of the otherwise degenerate AF magnon modes with no need to apply a magnetic field. It is also proposed that measurements of the renormalized dispersion relations can provide the amplitude of the effective exchange field induced by the AF in the adjacent metal.
