Radiative spin caloritronics in nonreciprocal many-body systems
Abstract
We predict the spin thermal Hall effect in nonreciprocal magneto-optical many-body systems, in which a longitudinal radiative heat current generates a transverse accumulation of the spin angular momentum carried by thermal photons. We show that this effect and the inverse spin thermal Hall effect constitute an Onsager-Casimir reciprocal pair, thereby establishing heat and photon spin as coupled transport channels in nonreciprocal photonic systems. The second law of thermodynamics imposes fundamental bounds on the spin-heat coupling, leading to a thermal-spin figure of merit that quantifies the efficiency of radiative spin-heat conversion. Our results establish a complete thermodynamic framework for photon spin caloritronics and lay the conceptual foundations for spin-controlled thermal radiation and nonreciprocal photonic thermal devices.
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BibTeX
@misc{benabdallah2026radiative,
title = {{Radiative spin caloritronics in nonreciprocal many-body systems}},
author = {Philippe Ben-Abdallah},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2607.22845},
eprint = {2607.22845},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2607.22845},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Radiative spin caloritronics in nonreciprocal many-body systems
AU - Philippe Ben-Abdallah
PY - 2026
DA - 2026/10/21
PB - arXiv
DO - 10.48550/arxiv.2607.22845
UR - https://arxiv.org/abs/2607.22845
AB - We predict the spin thermal Hall effect in nonreciprocal magneto-optical many-body systems, in which a longitudinal radiative heat current generates a transverse accumulation of the spin angular momentum carried by thermal photons. We show that this effect and the inverse spin thermal Hall effect constitute an Onsager-Casimir reciprocal pair, thereby establishing heat and photon spin as coupled transport channels in nonreciprocal photonic systems. The second law of thermodynamics imposes fundamental bounds on the spin-heat coupling, leading to a thermal-spin figure of merit that quantifies the efficiency of radiative spin-heat conversion. Our results establish a complete thermodynamic framework for photon spin caloritronics and lay the conceptual foundations for spin-controlled thermal radiation and nonreciprocal photonic thermal devices.
ER -