# Green's function formalism for nonlocal elliptical magnon transport

@inproceedings{Sterk2021GreensFF, title={Green's function formalism for nonlocal elliptical magnon transport}, author={W. P. Sterk and Andreas Ruckriegel and H. Y. Yuan and Babak Zare Rameshti and Rembert A. Duine}, year={2021} }

We develop a non-equilibrium Green’s function formalism to study magnonic spin transport through a strongly anisotropic ferromagnetic insulator contacted by metallic leads. We model the ferromagnetic insulator as a finite-sized one-dimensional spin chain, with metallic contacts at the first and last sites that inject and detect spin in the form of magnons. In the presence of anisotropy, these ferromagnetic magnons become elliptically polarized, and spin conservation is broken. We show that this… Expand

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SHOWING 1-10 OF 58 REFERENCES

Green's function formalism for spin transport in metal-insulator-metal heterostructures

- Physics
- 2017

We develop a Green's function formalism for spin transport through heterostructures that contain metallic leads and insulating ferromagnets. While this formalism in principle allows for the inclusion… Expand

Nonlocal Spin Transport as a Probe of Viscous Magnon Fluids.

- Physics, Medicine
- Physical review letters
- 2019

Taking into account momentum- and spin-relaxation processes, the quasiconservation laws for momentum and spin in a magnon fluid are considered and the resulting equations are solved for nonlocal spin transport devices in which spin is injected and detected via metallic leads. Expand

Magnon Spin Hall Magnetoresistance of a Gapped Quantum Paramagnet.

- Physics, Medicine
- Physical review letters
- 2018

This Letter may motivate electrical detection of the phases of quantum magnets and the incorporation of such materials into spintronic devices. Expand

Electronic pumping of quasiequilibrium Bose-Einstein-condensed magnons.

- Physics, Medicine
- Physical review letters
- 2012

Spin transfer between a system of quasiequilibrated Bose-Einstein-condensed magnons in an insulator in direct contact with a conductor is theoretically investigated and the experimental feasibility of observing a BEC steady state is discussed. Expand

Magnon spin transport driven by the magnon chemical potential in a magnetic insulator

- Physics
- 2016

We develop a linear-response transport theory of diffusive spin and heat transport by magnons in magnetic insulators with metallic contacts. The magnons are described by a position-dependent… Expand

Ellipticity and dissipation effects in magnon spin valves

- Physics
- 2020

We consider alignment-dependent spin and heat transport across a magnon spin valve in the tunneling regime, i.e., a junction consisting of two weakly coupled ferromagnetic insulators. We determine… Expand

Spin Currents and Magnon Dynamics in Insulating Magnets

- Physics
- 2016

Nambu-Goldstone theorem provides gapless modes to both relativistic and nonrelativistic systems. The Nambu-Goldstone bosons in insulating magnets are called magnons or spin-waves and play a key role… Expand

Super-Poissonian Shot Noise of Squeezed-Magnon Mediated Spin Transport.

- Physics, Medicine
- Physical review letters
- 2016

It is found that the shot noise of the spin current traversing the F|N interface when F is subjected to a coherent microwave drive is frequency independent up to the drive frequency, and increases linearly with frequency thereafter. Expand

Long-distance transport of magnon spin information in a magnetic insulator at room temperature

- Physics
- 2015

Although electron motion is prohibited in magnetic insulators, the electron spin can be transported by magnons. Such magnons, generated and detected using all-electrical methods, are now shown to… Expand

Magnon-magnon interactions in the spin-Peierls compound CuGeO3

- Physics
- 1997

In a magnetic substance the gap in the Raman spectrum, Delta_R, is approximatively twice the value of the neutron scattering gap, Delta_S, if the the magnetic excitations (magnons) are only weakly… Expand