Proximity-induced spin-polarized magnetocaloric effect in transition metal dichalcogenides
arXiv:2108.08371 · doi:10.1103/PhysRevB.105.014443
Abstract
We explore proximity-induced magnetocaloric effect (MCE) on transition metal dichalcogenides, focusing on a two-dimensional (2D) MoTe monolayer deposited on a ferromagnetic semiconductor EuO substrate connected to a heat source. We model this heterostructure using a tight-binding model, incorporating exchange and Rashba fields induced by proximity to EuO, and including temperature through Fermi statistics. The MCE is induced on the 2D MoTe layer due to the EuO substrate, revealing large spin-polarized entropy changes for energies out of the band gap of the MoTe-EuO system. By gating the chemical potential, the MCE can be tuned to produce heating for spin up and cooling for spin down across the and valley splitting in the valence band, whereas either heats or cools for both spins in the conduction band. The Rashba field enhances the MCE in the valence zone while decreasing it in the conduction bands. The exchange field-induced MCE could be useful to produce tunable spin-polarized thermal responses in magnetic proximitized 2D materials.
arXiv comment6 pages, 5 figures
References in corpus (32)
- Van der Waals heterostructures
- Quantum Spin Hall Effect in Graphene
- Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
- Three-band tight-binding model for monolayers of group-VIB transition metal dichalcogenides
- Magnetic Control of Valley Pseudospin in Monolayer WSe2
- Breaking of valley degeneracy by magnetic field in monolayer MoSe2
- Electronic structures and theoretical modelling of two-dimensional group-VIB transition metal dichalcogenides
- Valley Splitting and Polarization by the Zeeman Effect in Monolayer MoSe2
- Enhanced valley splitting in monolayer WSe2 due to magnetic exchange field
- Valley Manipulation by Optically Tuning the Magnetic Proximity Effect in WSe/CrI Heterostructures
- Giant and tunable valley degeneracy splitting in MoTe2
- Giant Valley Splitting in Monolayer WS2 by Magnetic Proximity Effect
- Enhanced magnetocaloric effect in frustrated magnets
- Spin-Orbit mediated spin relaxation in monolayer MoS2
- Entropy production and time asymmetry in nonequilibrium fluctuations
- Magnetic Proximity Effects in Transition-Metal Dichalcogenides: Converting Excitons
- Magnetocaloric effect in one-dimensional antiferromagnets
- What Makes Effective Gating Possible in Two-Dimensional Heterostructures?
- Soft x-ray magnetic circular dichroism study on Gd-doped EuO thin films
- Protected pseudohelical edge states in proximity graphene ribbons and flakes
- Tunable spin-polarized edge currents in proximitized transition metal dichalcogenides
- Magnetocaloric effect in two-dimensional spin-1/2 antiferromagnets
- Anomalous Hall effect in 2-phase transition-metal dichalcogenide monolayers on ferromagnetic substrates
- Proximity-induced topological phases in bilayer graphene
- Vacancy tuned thermoelectric properties and high spin filtering performance in graphene/silicene heterostructures
- Symmetries and hybridization in the indirect interaction between magnetic moments in MoS nanoflakes
- Oscillating magnetocaloric effect of a 2D non-relativistic diamagnetic material
- Noncollinear exchange interaction in transition metal dichalcogenide edges
- Magnetocaloric effect as a signature of quantum level-crossing for a spin-gapped system
- Table-like magnetocaloric effect and enhanced refrigerant capacity in EuO1-δ thin films
- Reversible edge spin currents in antiferromagnetically proximitized dichalcogenides
- Optical injection of a spin current into a zigzag nanoribbon of monolayer MoS2 with antiferromagnetic Kekule distortion