Matthieu Jamet
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View article: Room temperature magnetic vortices in the van der Waals magnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msub> <mml:mi>Fe</mml:mi> <mml:mn>5</mml:mn> </mml:msub> <mml:msub> <mml:mi>GeTe</mml:mi> <mml:mn>2</mml:mn> </mml:msub> </mml:mrow> </mml:math>
Room temperature magnetic vortices in the van der Waals magnet Open
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View article: Spin and Orbital Rashba response in ferroelectric polarized PtSe$_2$/MoSe$_2$/LiNbO$_3$ heterostructures
Spin and Orbital Rashba response in ferroelectric polarized PtSe$_2$/MoSe$_2$/LiNbO$_3$ heterostructures Open
Recent studies using Terahertz Time-Domain Spectroscopy (THz-TDS) with spintronic emitters as a source have revealed distinct signatures of the Rashba effect. This effect, which arises from the breaking of inversion symmetry in low-dimensi…
View article: Terahertz Electronic and Spin Currents in Wafer‐Scale Van der Waals Bi <sub>2</sub> Se <sub>3</sub> /WSe <sub>2</sub> Heterostructures and Polymorphs
Terahertz Electronic and Spin Currents in Wafer‐Scale Van der Waals Bi <sub>2</sub> Se <sub>3</sub> /WSe <sub>2</sub> Heterostructures and Polymorphs Open
Van der Waals heterostructures and polymorphs have promised the realization of artificial materials with multiple physical phenomena such as giant optical nonlinearities, spin‐to‐charge interconversion in spintronics and topological carrie…
View article: Room temperature magnetic vortices in the van der Waals magnet Fe$_5$GeTe$_2$
Room temperature magnetic vortices in the van der Waals magnet Fe$_5$GeTe$_2$ Open
We investigate the effect of confinement on the magnetic state of a 12 nm-thick Fe$_5$GeTe$_2$ layer grown by molecular beam epitaxy. We use quantitative scanning NV magnetometry to locally extract the magnetization in rectangular uniforml…
View article: Monolayer Control of Spin-Charge Conversion in van der Waals Heterostructures
Monolayer Control of Spin-Charge Conversion in van der Waals Heterostructures Open
The diversity of 2D materials and their van der Waals (vdW) stacking presents fertile ground for engineering novel multifunctional materials and quantum states of matter. This permits unique opportunities to tailor the electronic propertie…
View article: Two-dimensional to bulk crossover of the WSe<sub>2</sub> electronic band structure
Two-dimensional to bulk crossover of the WSe<sub>2</sub> electronic band structure Open
Transition metal dichalcogenides (TMDs) are layered materials obtained by stacking two-dimensional sheets weakly bonded by van der Waals interactions. In bulk TMD, band dispersions are observed in the direction normal to the sheet plane ( …
View article: Inverse Rashba Edelstein THz emission modulation induced by ferroelectricity in CoFeB/PtSe2/MoSe2//LiNbO3 systems
Inverse Rashba Edelstein THz emission modulation induced by ferroelectricity in CoFeB/PtSe2/MoSe2//LiNbO3 systems Open
Spintronic terahertz emitters, based on optically triggered spin-to-charge conversion processes, have recently emerged as a novel route toward compact and efficient THz sources. The next challenge for technologically relevant devices, howe…
View article: Monolayer control of spin-charge conversion in van der Waals heterostructures
Monolayer control of spin-charge conversion in van der Waals heterostructures Open
The diversity of 2D materials and their van der Waals (vdW) stacking presents a fertile ground for engineering novel multifunctional materials and quantum states of matter. This permits unique opportunities to tailor the electronic propert…
View article: Inverse Rashba-Edelstein THz emission modulation induced by ferroelectricity in CoFeB/PtSe2/MoSe2//LiNbO3 systems
Inverse Rashba-Edelstein THz emission modulation induced by ferroelectricity in CoFeB/PtSe2/MoSe2//LiNbO3 systems Open
Spintronic Terahertz emitters, based on optically triggered spin-to-charge interconversion processes, have recently emerged as novel route towards compact and efficient THz sources. Yet, the next challenge for further technologically-relev…
View article: Bilayer orthogonal ferromagnetism in CrTe$_2$-based van der Waals system
Bilayer orthogonal ferromagnetism in CrTe$_2$-based van der Waals system Open
Systems with pronounced spin anisotropy play a pivotal role in advancing magnetization switching and spin-wave generation mechanisms, which are fundamental for spintronic technologies. Quasi-van der Waals ferromagnets, particularly Cr$_{1+…
View article: Imaging Negative Charge around Single Vanadium Dopant Atoms in Monolayer Tungsten Diselenide Using 4D Scanning Transmission Electron Microscopy
Imaging Negative Charge around Single Vanadium Dopant Atoms in Monolayer Tungsten Diselenide Using 4D Scanning Transmission Electron Microscopy Open
There has been extensive activity exploring the doping of semiconducting two-dimensional (2D) transition metal dichalcogenides in order to tune their electronic and magnetic properties. The outcome of doping depends on various factors, inc…
View article: Enhanced optical properties of MoSe2 grown by molecular beam epitaxy on hexagonal boron nitride
Enhanced optical properties of MoSe2 grown by molecular beam epitaxy on hexagonal boron nitride Open
Transition metal dichalcogenides (TMDs) like MoSe2 exhibit remarkable optical properties such as intense photoluminescence (PL) in the monolayer form. To date, narrow-linewidth PL is only achieved in micrometer-sized exfoliated TMD flakes …
View article: Enhanced optical properties of MoSe$_2$ grown by molecular beam epitaxy on hexagonal boron nitride
Enhanced optical properties of MoSe$_2$ grown by molecular beam epitaxy on hexagonal boron nitride Open
Transition metal dichalcogenides (TMD) like MoSe$_2$ exhibit remarkable optical properties such as intense photoluminescence (PL) in the monolayer form. To date, narrow-linewidth PL is only achieved in micrometer-sized exfoliated TMD flake…
View article: Two-dimensional to bulk crossover of the WSe$_2$ electronic band structure
Two-dimensional to bulk crossover of the WSe$_2$ electronic band structure Open
Transition Metal Dichalcogenides (TMD) are layered materials obtained by stacking two-dimensional sheets weakly bonded by van der Waals interactions. In bulk TMD, band dispersions are observed in the direction normal to the sheet plane (z-…
View article: Development and optimization of large-scale integration of 2D material in memristors
Development and optimization of large-scale integration of 2D material in memristors Open
Two-dimensional (2D) materials like transition metal dichalcogenides (TMD) have proved to be serious candidates to replace silicon in several technologies with enhanced performances. In this respect, the two remaining challenges are the wa…
View article: Magnetic evolution of Cr2Te3 epitaxially grown on graphene with post-growth annealing
Magnetic evolution of Cr2Te3 epitaxially grown on graphene with post-growth annealing Open
Two-dimensional and van der Waals ferromagnets are ideal platform to study low-dimensional magnetism and proximity effects in van der Waals heterostructures. Their ultimate two-dimensional character also offers the opportunity to easily ad…
View article: Development and optimization of large-scale integration of 2D material in memristors
Development and optimization of large-scale integration of 2D material in memristors Open
Two-dimensional (2D) materials like transition metal dichalcogenides (TMD) have proved to be serious candidates to replace silicon in several technologies with enhanced performances. In this respect, the two remaining challenges are the wa…
View article: Magnetic evolution of Cr$_2$Te$_3$ epitaxially grown on graphene with post-growth annealing
Magnetic evolution of Cr$_2$Te$_3$ epitaxially grown on graphene with post-growth annealing Open
Two-dimensional and van der Waals ferromagnets are ideal platform to study low dimensional magnetism and proximity effects in van der Waals heterostructures. Their ultimate two dimensional character offers also the opportunity to easily ad…
View article: Light-driven Electrodynamics and Demagnetization in FenGeTe2 (n = 3, 5) Thin Films
Light-driven Electrodynamics and Demagnetization in FenGeTe2 (n = 3, 5) Thin Films Open
Two-dimensional materials-based ultrafast spintronics is expected to surpass conventional data storage and manipulation technologies, that are now reaching their fundamental limits. The newly discovered van der Waals (VdW) magnets provide …
View article: Spin–Orbit Torques and Magnetization Switching in (Bi,Sb)<sub>2</sub>Te<sub>3</sub>/Fe<sub>3</sub>GeTe<sub>2</sub> Heterostructures Grown by Molecular Beam Epitaxy
Spin–Orbit Torques and Magnetization Switching in (Bi,Sb)<sub>2</sub>Te<sub>3</sub>/Fe<sub>3</sub>GeTe<sub>2</sub> Heterostructures Grown by Molecular Beam Epitaxy Open
Topological insulators (TIs) hold promise for manipulating the magnetization of a ferromagnet (FM) through the spin-orbit torque (SOT) mechanism. However, integrating TIs with conventional FMs often leads to significant device-to-device va…
View article: Atomic‐Layer Controlled Transition from Inverse Rashba–Edelstein Effect to Inverse Spin Hall Effect in 2D PtSe<sub>2</sub> Probed by THz Spintronic Emission
Atomic‐Layer Controlled Transition from Inverse Rashba–Edelstein Effect to Inverse Spin Hall Effect in 2D PtSe<sub>2</sub> Probed by THz Spintronic Emission Open
2D materials, such as transition metal dichalcogenides, are ideal platforms for spin‐to‐charge conversion (SCC) as they possess strong spin–orbit coupling (SOC), reduced dimensionality and crystal symmetries as well as tuneable band struct…
View article: Angular dependence of the interlayer coupling at the interface between two dimensional materials 1T-PtSe$_2$ and graphene
Angular dependence of the interlayer coupling at the interface between two dimensional materials 1T-PtSe$_2$ and graphene Open
We present a study by Scanning Tunneling Microscopy, supported by ab initio calculations, of the interaction between graphene and monolayer (semiconducting) PtSe$_2$ as a function of the twist angle $θ$ between the two layers. We analyze t…
View article: Atomic scale imaging of the negative charge induced by a single vanadium dopant atom in monolayer WSe$_2$ using 4D-STEM
Atomic scale imaging of the negative charge induced by a single vanadium dopant atom in monolayer WSe$_2$ using 4D-STEM Open
There has been extensive activity exploring the doping of semiconducting two-dimensional (2D) transition metal dichalcogenides in order to tune their electronic and magnetic properties. The outcome of doping depends on various factors, inc…
View article: Mapping domain junctions using 4D-STEM: toward controlled properties of epitaxially grown transition metal dichalcogenide monolayers
Mapping domain junctions using 4D-STEM: toward controlled properties of epitaxially grown transition metal dichalcogenide monolayers Open
Epitaxial growth has become a promising route to achieve highly crystalline continuous two-dimensional layers. However, high-quality layer production with expected electrical properties is still challenging due to the defects induced by th…
View article: Mapping domain junctions using 4D-STEM: toward controlled properties of epitaxially grown transition metal dichalcogenide monolayers
Mapping domain junctions using 4D-STEM: toward controlled properties of epitaxially grown transition metal dichalcogenide monolayers Open
Epitaxial growth has become a promising route to achieve highly crystalline continuous two-dimensional layers. However, high-quality layer production with expected electrical properties is still challenging due to the defects induced by th…
View article: Atomic-layer controlled THz Spintronic emission from Epitaxially grown Two dimensional PtSe$_2$/ferromagnet heterostructures
Atomic-layer controlled THz Spintronic emission from Epitaxially grown Two dimensional PtSe$_2$/ferromagnet heterostructures Open
Terahertz (THz) Spintronic emitters based on ferromagnetic/metal junctions have become an important technology for the THz range, offering powerful and ultra-large spectral bandwidths. These developments have driven recent investigations o…
View article: Epitaxial van der Waals heterostructures of Cr2Te3 on 2D materials
Epitaxial van der Waals heterostructures of Cr2Te3 on 2D materials Open
Achieving large-scale growth of two-dimensional (2D) ferromagnetic materials with high Curie temperature (TC) and perpendicular magnetic anisotropy (PMA) is highly desirable for the development of ultra-compact magnetic sensors and magneti…
View article: Spin-orbit torque switching in 2D ferromagnet / topological insulator heterostructure grown by molecular beam epitaxy
Spin-orbit torque switching in 2D ferromagnet / topological insulator heterostructure grown by molecular beam epitaxy Open
Topological insulators (TIs) are a promising class of materials for manipulating the magnetization of an adjacent ferromagnet (FM) through the spin-orbit torque (SOT) mechanism. However, current studies combining TIs with conventional FMs …