Transverse dynamical magnetic susceptibilities from regular static density functional theory: Evaluation of damping and g-shifts of spin-excitations

Abstract

The dynamical transverse magnetic Kohn-Sham susceptibility calculated within time-dependent density functional theory shows a fairly linear behavior for a finite energy window. This observation is used to propose a scheme where the computation of this quantity is greatly simplified. Regular simulations based on static density functional theory can be used to extract the dynamical behavior of the magnetic response function. Besides the ability to calculate elegantly damping of magnetic excitations, we derive along the way useful equations giving the main characteristics of these excitations: effective $g$-factors and the resonance frequencies that can be accessed experimentally using inelastic scanning tunneling spectroscopy or spin-polarized electron energy loss spectroscopy.

7 pages, 1 figure

References in corpus (10)

• Magnetic Anisotropy and Magnetization Dynamics of Individual Atoms and Clusters of Fe and Co on Pt(111)
• Protection of excited spin states by a superconducting energy gap
• Wannier-function approach to spin excitations in solids
• Spin Orbit Coupling and Spin Waves in Ultrathin Ferromagnets: The Spin Wave Rashba Effect
• Transverse spin diffusion in ferromagnets
• Dynamical magnetic excitations of nanostructures from first-principles
• Mapping the magnetic exchange interactions from first principles: Anisotropy anomaly and application to Fe, Ni, and Co
• Relativistic dynamical spin excitations of magnetic adatoms
• Renormalization of electron self-energies via their interaction with spin excitations: A first-principles investigation
• Accurate bare susceptibilities from full-potential $\text{ab initio}$ calculations