Abstract

In this work, we theoretically investigate the spin Peltier effect in a heterostructure composed of graphene and a ferromagnetic insulator (FI). Using a microscopic formalism based on characteristic scattering length at the FI, we analyze how spin accumulation in graphene give rise to temperature differences across the junction. We demonstrate that in the presence of an external magnetic field, the electronic spectrum of graphene is quantized into Landau Levels, which strongly modifies the available spin-flip scattering channels. In particular, the crossing of Landau levels significantly enhances the spin-flip scattering amplitude, leading to a pronounced amplification of the spin Peltier response. Our results suggest that measurements of the spin-induced temperature difference in graphene–ferromagnet heterostructures can serve as a sensitive probe of discrete electronic energy levels. More broadly, the present work provides a theoretical framework for understanding spin-driven thermal effects in hybrid systems combining Dirac materials and magnetic insulators.

Abstract

In this work, we theoretically investigate the spin Peltier effect in a heterostructure composed of graphene and a ferromagnetic insulator (FI). Using a microscopic formalism based on characteristic scattering length at the FI, we analyze how spin accumulation in graphene give rise to temperature differences across the junction. We demonstrate that in the presence of an external magnetic field, the electronic spectrum of graphene is quantized into Landau Levels, which strongly modifies the available spin-flip scattering channels. In particular, the crossing of Landau levels significantly enhances the spin-flip scattering amplitude, leading to a pronounced amplification of the spin Peltier response. Our results suggest that measurements of the spin-induced temperature difference in graphene–ferromagnet heterostructures can serve as a sensitive probe of discrete electronic energy levels. More broadly, the present work provides a theoretical framework for understanding spin-driven thermal effects in hybrid systems combining Dirac materials and magnetic insulators.

Abstract

In this work, we theoretically investigate the spin Peltier effect in a heterostructure composed of graphene and a ferromagnetic insulator (FI). Using a microscopic formalism based on characteristic scattering length at the FI, we analyze how spin accumulation in graphene give rise to temperature differences across the junction. We demonstrate that in the presence of an external magnetic field, the electronic spectrum of graphene is quantized into Landau Levels, which strongly modifies the available spin-flip scattering channels. In particular, the crossing of Landau levels significantly enhances the spin-flip scattering amplitude, leading to a pronounced amplification of the spin Peltier response. Our results suggest that measurements of the spin-induced temperature difference in graphene–ferromagnet heterostructures can serve as a sensitive probe of discrete electronic energy levels. More broadly, the present work provides a theoretical framework for understanding spin-driven thermal effects in hybrid systems combining Dirac materials and magnetic insulators.

Abstract

In this work, we theoretically investigate the spin Peltier effect in a heterostructure composed of graphene and a ferromagnetic insulator (FI). Using a microscopic formalism based on characteristic scattering length at the FI, we analyze how spin accumulation in graphene give rise to temperature differences across the junction. We demonstrate that in the presence of an external magnetic field, the electronic spectrum of graphene is quantized into Landau Levels, which strongly modifies the available spin-flip scattering channels. In particular, the crossing of Landau levels significantly enhances the spin-flip scattering amplitude, leading to a pronounced amplification of the spin Peltier response. Our results suggest that measurements of the spin-induced temperature difference in graphene–ferromagnet heterostructures can serve as a sensitive probe of discrete electronic energy levels. More broadly, the present work provides a theoretical framework for understanding spin-driven thermal effects in hybrid systems combining Dirac materials and magnetic insulators.