English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Preprint

Magnon frequency renormalization by the electronic geometrical spin torque in itinerant magnets

MPS-Authors
/persons/resource/persons249487

Viñas Boström,  E.
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

/persons/resource/persons193068

Eich,  F. G.
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
HQS Quantum Simulations GmbH;

/persons/resource/persons22028

Rubio,  A.
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Computational Quantum Physics (CCQ), Flatiron Institute;

External Resource
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)

2112.06547.pdf
(Preprint), 2MB

Supplementary Material (public)
There is no public supplementary material available
Citation

Viñas Boström, E., Eich, F. G., & Rubio, A. (2021). Magnon frequency renormalization by the electronic geometrical spin torque in itinerant magnets.


Cite as: https://hdl.handle.net/21.11116/0000-0009-9E81-3
Abstract
We investigate non-adiabatic effects on the magnon frequency in an interacting system of localized spins and itinerant electrons. Including the lowest order corrections to the adiabatic dynamics in an analytically solvable model, applicable to simple ferromagnets like Fe, Co and Ni, we find that the magnon frequency is renormalized by a geometrical torque arising from the electronic spin Berry curvature. Comparison to exact numerical simulations reveals that our analytical solution captures essential low-energy features, and provides a mechanism for the magnon frequency hardening observed in recent first principles calculations for Fe, provided the geometrical torque is taken into account.