论文标题
相互作用的自旋1/2夹子的紧急多体复合激发
Emergent many-body composite excitations of interacting spin-1/2 trimers
论文作者
论文摘要
了解量子旋转系统中磁性的异国形式是现代冷凝物理物理学的一个新兴主题。量子动力学可以通过信息的粒子样载体来描述，这些载体是从基础系统的集体行为中出现的已知的准粒子。针对抗铁磁链模型的模型，已经准确地计算了量子自旋系统激发的Spinon激发，并且已经准确地计算出来并精确地对其进行了实验验证。但是，从具有定期交换相互作用的自旋系统的拓扑激发中出现的新型准颗粒的鉴定和表征尚未获得。 Here, we report the identification of emergent composite excitations of the novel quasiparticles doublons and quartons in spin-1/2 trimer-chain antiferromagnet Na2Cu3Ge4O12 (having periodic intrachain exchange interactions J1-J1-J2) and its topologically protected quantum 1/3 magnetization-plateau state.中子散射以及宏观量子1/3 Magnetization-Plateau状态的特征能，分散关系和动力学结构因子与最新的动态密度矩阵重新分配组计算非常吻合。
Understanding exotic forms of magnetism in quantum spin systems is an emergent topic of modern condensed matter physics. Quantum dynamics can be described by particle-like carriers of information, known-as quasiparticles that appear from the collective behaviour of the underlying system. Spinon excitations, governing the excitations of quantum spin-systems, have been accurately calculated and precisely verified experimentally for the antiferromagnetic chain model. However, identification and characterization of novel quasiparticles emerging from the topological excitations of the spin system having periodic exchange interactions are yet to be obtained. Here, we report the identification of emergent composite excitations of the novel quasiparticles doublons and quartons in spin-1/2 trimer-chain antiferromagnet Na2Cu3Ge4O12 (having periodic intrachain exchange interactions J1-J1-J2) and its topologically protected quantum 1/3 magnetization-plateau state. The characteristic energies, dispersion relations, and dynamical structure factor of neutron scattering as well as macroscopic quantum 1/3 magnetization-plateau state are in good agreement with the state-of-the-art dynamical density matrix renormalization group calculations.
