Breakdown of chiral edge modes in topological magnon insulators
Topological magnon insulators (TMI) are ordered magnets supporting chiral edge magnon
excitations. These edge states are envisioned to serve as topologically protected information …
excitations. These edge states are envisioned to serve as topologically protected information …
Keldysh theory of thermal transport in multiband Hamiltonians
We establish a comprehensive theoretical framework for systems subjected to a static
uniform temperature gradient, employing the nonequilibrium Keldysh-Dyson formalism. This …
uniform temperature gradient, employing the nonequilibrium Keldysh-Dyson formalism. This …
Structure, control, and dynamics of altermagnetic textures
We present a phenomenological theory of altermagnets, that captures their unique
magnetization dynamics and allows modeling magnetic textures in this new magnetic …
magnetization dynamics and allows modeling magnetic textures in this new magnetic …
Nonlocal damping of spin waves in a magnetic insulator induced by normal, heavy, or altermagnetic metallic overlayer: a Schwinger-Keldysh field theory approach
F Reyes-Osorio, BK Nikolic - arXiv preprint arXiv:2312.09140, 2023 - arxiv.org
Understanding spin wave (SW) damping, and how to control it to the point of being able to
amplify SW-mediated signals, is one of the key requirements to bring the envisaged …
amplify SW-mediated signals, is one of the key requirements to bring the envisaged …
Impact of magnon interactions on transport in honeycomb antiferromagnets
K Sourounis, A Manchon - Physical Review B, 2024 - APS
The thermal transport of magnons has attracted substantial attention as an energy-efficient
alternative to the transport of electrons. Most theoretical studies so far have been carried out …
alternative to the transport of electrons. Most theoretical studies so far have been carried out …
Topological phase transitions and thermal Hall effect in a noncollinear spin texture
The noncollinear spin textures provide promising avenues to stabilize exotic magnetic
phases and excitations. They have attracted vast attention in the past decades due to their …
phases and excitations. They have attracted vast attention in the past decades due to their …
Magnon spectrum of altermagnets: Time-dependent matrix product states vs. linearized Holstein-Primakoff calculations unravelling spontaneous magnon decay
The energy-momentum dispersion of magnons, viewed as noninteracting and infinitely long-
lived quasiparticles describing collective low-energy excitations of magnetic materials, is …
lived quasiparticles describing collective low-energy excitations of magnetic materials, is …
The landscape of symmetry enhancement in tight-binding models
Band structures are ubiquitous in condensed matter physics and their symmetries constrain
possible degeneracies, topology and response functions across a broad range of different …
possible degeneracies, topology and response functions across a broad range of different …
Spontaneous Crystal Thermal Hall Effect in Insulating Altermagnets
We show that magnetic insulators with a collinear and compensated order can exhibit a
thermal Hall effect even at zero magnetic field if they have altermagnetic symmetries. We …
thermal Hall effect even at zero magnetic field if they have altermagnetic symmetries. We …
Schwinger-Keldysh nonequilibrium quantum field theory of open quantum systems beyond the Markovian regime: Application to the spin-boson model
We develop a Schwinger-Keldysh field theory (SKFT) for open quantum systems interacting
with a dissipative environment and apply it to the spin-boson model as an archetypical …
with a dissipative environment and apply it to the spin-boson model as an archetypical …