Impact of exciton-phonon and exciton-magnon interaction on transport in anisotropic 2D magnetic semiconductors
Abstract
Two-dimensional magnetic semiconductors provide a unique platform for exploring the interplay between charge, lattice, spin, and light. The strong Coulomb interaction combined with long-range magnetic order enables efficient coupling between excitons and both lattice vibrations and spin excitations, thereby strongly influencing exciton dynamics and transport in these materials. Here, we develop a microscopic many-body theory of exciton--phonon and exciton--magnon interactions in mono- and bilayer CrSBr. We demonstrate that the quasi-one-dimensional character of excitons in CrSBr gives rise to strongly anisotropic exciton--phonon and exciton--magnon scattering, resulting in direction-dependent diffusion coefficients. Furthermore, we identify a distinct temperature dependence originating from one-phonon and two-magnon scattering processes, providing characteristic signatures of the underlying microscopic interactions. Our work establishes a microscopic framework for understanding exciton transport in magnetic van der Waals semiconductors and provides guidance for future optical spectroscopy and exciton transport experiments.
Related
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BibTeX
@misc{erkensten2026impact,
title = {{Impact of exciton-phonon and exciton-magnon interaction on transport in anisotropic 2D magnetic semiconductors}},
author = {Daniel Erkensten and Katarzyna Sadecka and Marie-Christin Heißenbüttel and Thorsten Deilmann and Ermin Malic},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.21746},
eprint = {2609.21746},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.21746},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Impact of exciton-phonon and exciton-magnon interaction on transport in anisotropic 2D magnetic semiconductors
AU - Daniel Erkensten
AU - Katarzyna Sadecka
AU - Marie-Christin Heißenbüttel
AU - Thorsten Deilmann
AU - Ermin Malic
PY - 2026
DA - 2026/09/18
PB - arXiv
DO - 10.48550/arxiv.2609.21746
UR - https://arxiv.org/abs/2609.21746
AB - Two-dimensional magnetic semiconductors provide a unique platform for exploring the interplay between charge, lattice, spin, and light. The strong Coulomb interaction combined with long-range magnetic order enables efficient coupling between excitons and both lattice vibrations and spin excitations, thereby strongly influencing exciton dynamics and transport in these materials. Here, we develop a microscopic many-body theory of exciton--phonon and exciton--magnon interactions in mono- and bilayer CrSBr. We demonstrate that the quasi-one-dimensional character of excitons in CrSBr gives rise to strongly anisotropic exciton--phonon and exciton--magnon scattering, resulting in direction-dependent diffusion coefficients. Furthermore, we identify a distinct temperature dependence originating from one-phonon and two-magnon scattering processes, providing characteristic signatures of the underlying microscopic interactions. Our work establishes a microscopic framework for understanding exciton transport in magnetic van der Waals semiconductors and provides guidance for future optical spectroscopy and exciton transport experiments.
ER -