4 papers
Controlling encirclement of an exceptional point using coupled spintronic nano-oscillators
K. Ho, S. Perna, S. Wittrock +8
Exceptional points (EPs), branch singularities parameter space of non-Hermitian eigenvalue manifolds, display unique topological phenomena linked to eigenvalue and eigenvector swit…
Midpoint geometric integrators for inertial magnetization dynamics
Massimiliano d'Aquino, Salvatore Perna, Claudio Serpico
We consider the numerical solution of the inertial version of Landau-Lifshitz-Gilbert equation (iLLG), which describes high-frequency nutation on top of magnetization precession du…
Signatures of Chaos in Thermal Switching of Nanomagnets
M. d'Aquino, C. Serpico, S. Perna +4
Thermally-activated magnetization dynamics of small nanoparticles subject to microwave (AC) external fields is studied. It is shown that, under sufficiently strong microwave excita…
Spin-wave instabilities in spin-transfer-driven magnetization dynamics
G. Bertotti, R. Bonin, M. d'Aquino +2
We study the stability of magnetization precessions induced in spin-transfer devices by the injection of spin-polarized electric currents. Instability conditions are derived by int…