Relativistic dynamical spin excitations of magnetic adatoms

Autor:	Dias, Manuel dos Santos, Schweflinghaus, Benedikt, Blügel, Stefan, Lounis, Samir
Rok vydání:	2015
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Strongly Correlated Electrons
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.91.075405
Popis:	We present a first-principles theory of dynamical spin excitations in the presence of spin-orbit coupling. The broken global spin rotational invariance leads to a new sum rule. We explore the competition between the magnetic anisotropy energy and the external magnetic field, as well as the role of electron-hole excitations, through calculations for 3$d$-metal adatoms on the Cu(111) surface. The spin excitation resonance energy and lifetime display non-trivial behavior, establishing the strong impact of relativistic effects. We legitimate the use of the Landau-Lifshitz-Gilbert equation down to the atomic limit, but with parameters that differ from a stationary theory. Comment: 8 pages, 3 figures, accepted in PRB
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1501.05509 Zobrazit plný text záznamu View this record from Arxiv