Description
Using first-principles calculations, this study systematically elucidates the microscopic physical mechanisms of Gilbert damping in bulk transition metals at low temperatures. The results show that quenching of orbital angular momentum leads to the complete disappearance of the Gilbert damping effect; whereas spin-orbit coupling in degenerate energy bands can partially restore orbital angular momentum, and the degree of restoration at the Fermi surface directly determines the magnitude of the damping coefficient. Furthermore, the degree of orbital angular momentum restoration depends on the orbital components in the wavefunction and the phase differences between orbitals.
Primary authors
Xiangming Zhou
(复旦大学)
Prof.
Zhe Yuan
(复旦大学)
