2017/03/06 by Vardan Kaladzhyan, Pascal Simon, Mircea Trif
Mathematics · Physics and Astronomy · #Condensed matter physics #Hamiltonian (control theory) #MAJORANA #Magnetic field #Magnetization #Mathematics #Physics #Physics of Superconductivity and Magnetism #Precession #Quantum #Quantum many-body systems #Quantum mechanics #Superconductivity #Superfluidity #Topological Materials and Phenomena #Topological order #Topology (electrical circuits) #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.96.020507
published as Phys. Rev. B 96, 020507 (2017) · 5 pages+9 pages supplementary material
arxiv created 2017/03/06 · openalex publication_date 2017/07/28 · arxiv updated 2017/08/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study theoretically a chain of precessing classical magnetic impurities in an s-wave superconductor. Utilizing a rotating wave description, we derive an effective Hamiltonian that describes the emergent Shiba band. We find that this Hamiltonian shows nontrivial topological properties, and we obtain the corresponding topological phase diagrams both numerically and analytically. We show that changing precession frequency offers control over topological phase transitions and the emergence of Majorana bound states. We propose driving the magnetic impurities or magnetic texture into precession by means of spin-transfer torque in a spin Hall setup, and manipulate it using spin superfluidity in the case of planar magnetic order.