Large magnon spin Nernst effect induced by phonon-mediated magnon-magnon interaction in a two-dimensional antiferromagnetic material

Duy-Quang To; Joshua M. O. Zide; Matthew F. Doty

doi:10.1117/12.2675645

28 September 2023 Large magnon spin Nernst effect induced by phonon-mediated magnon-magnon interaction in a two-dimensional antiferromagnetic material

Duy-Quang To, Joshua M. O. Zide, Matthew F. Doty

Author Affiliations +

Proceedings Volume PC12656, Spintronics XVI; PC1265609 (2023) https://doi.org/10.1117/12.2675645
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

We theoretically study the thermal Hall and spin Nernst effect induced by the interaction between magnonic and phononic resonances at THz frequency in FePS3, a two-dimensional antiferromagnet (2D AFM) material. We find that a strong coupling between the magnetic excitation (magnon) and elastic excitation (phonon) in FePS3 combined with time-reversal-symmetry-breaking results in a finite Berry curvature concentrating within the anti-crossing point formed between the two distinct excitation bands. More interestingly, a very large spin Berry curvature emerges even in the absence of an external magnetic field due to phonon-mediated magnon-magnon interactions that cause a small energy gap between two magnon states. This results in topological transverse transport of quasi particles and spin momenta when a temperature gradient is applied to the quasi two-dimensional magnon phonon system in FePS3. We investigate the dependence of the thermal Hall and spin Nernst conductivity on the external magnetic field and temperature and find a very large spin Nernst conductivity at zero magnetic field. This results suggests possible experiments to explore the topological transport of a magnon-polaron system at THz frequency in a realistic 2D AFM material.

Conference Presentation

Citation Download Citation

Duy-Quang To, Joshua M. O. Zide, and Matthew F. Doty "Large magnon spin Nernst effect induced by phonon-mediated magnon-magnon interaction in a two-dimensional antiferromagnetic material", Proc. SPIE PC12656, Spintronics XVI, PC1265609 (28 September 2023); https://doi.org/10.1117/12.2675645

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Magnons

2D materials

Magnetism

Atomic force microscopy

Phonons

Terahertz radiation

Elasticity

Show All Keywords

Keywords/Phrases

Search In:

Publication Years