Large spin-to-charge conversion at room temperature in extended epitaxial Sb2Te3 topological insulator chemically grown on Silicon

Abstract

Spin-charge interconversion phenomena at the interface between magnetic materials and topological insulators (TIs) are attracting enormous interest in the research effort towards the development of fast and ultra-low power devices for the future information and communication technology. We report a large spin-to-charge conversion efficiency in Au/Co/Au/Sb2Te3/Si(111) heterostructures based on Sb2Te3 TIs grown by metal organic chemical vapor deposition on 4 inches Si(111) substrates. By conducting room temperature spin pumping ferromagnetic resonance, we measure an inverse Edelstein Effect length λIEE up to 0.75 nm, a record value for 3-dimensional chalcogenide-based TIs heterostructures. Our results open the path toward the use of chemical methods to produce TIs on large area Si substrates and characterized by highly performing spin-charge conversion, thus marking a milestone toward future technology-transfer.

arXiv commentMain text: 28 pages, 5 figures and 2 tables. Supplementary information are also included in the file with additional 12 pages

References in corpus (33)

• Topological Insulators
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Universal Intrinsic Spin-Hall Effect
• Enhanced Gilbert Damping in Thin Ferromagnetic Films
• Spin Transfer Torque Generated by the Topological Insulator Bi_2Se_3
• Nonlocal magnetization dynamics in ferromagnetic heterostructures
• Emergent Phenomena Induced by Spin-Orbit Coupling at Surfaces and Interfaces
• Spin pumping and magnetization dynamics in metallic multilayers
• Quantifying spin Hall angles from spin pumping: Experiments and Theory
• Spin-Diffusion Lengths in Metals and Alloys, and Spin-Flipping at Metal/Metal Interfaces: an Experimentalist's Critical Review
• Role of transparency of platinum-ferromagnet interface in determining intrinsic magnitude of spin Hall effect
• Fermi level dependent charge-to-spin current conversion by Dirac surface state of topological insulators
• Spin-pumping into surface states of topological insulator α-Sn, spin to charge conversion at room temperature
• Room temperature magnetization switching in topological insulator-ferromagnet heterostructures by spin-orbit torques
• On the line shape of the electrically detected ferromagnetic resonance
• Surface state dominated spin-charge current conversion in topological insulator/ferromagnetic insulator heterostructures
• Effective spin-mixing conductance of heavy-metal-ferromagnet interfaces
• Observation of inverse spin Hall effect in bismuth selenide
• Spin Hall Angle Quantification from Spin Pumping and Microwave Photoresistance
• Ultrafast Spin-To-Charge Conversion at the Surface of Topological Insulator Thin Films
• Dependence of spin pumping spin Hall effect measurements on layer thicknesses and stacking order
• FMR-related phenomena in spintronic devices
• Spin transport parameters in metallic multilayers determined by ferromagnetic resonance measurements of spin pumping
• Probing two topological surface bands of Sb2Te3 by spin-polarized photoemission spectroscopy
• Control of spin-orbit torques by interface engineering in topological insulator heterostructures
• Dirac-Surface-State-Dominated Spin to Charge Current Conversion in the Topological Insulator $(B{i}_{0.22}S{b}_{0.78}{)}_{2}T{e}_3$ Films at Room Temperature
• Spin diffusion length and polarization of ferromagnetic metals measured by spin-absorption technique in lateral spin valves
• Band engineering of Dirac surface states in topological insulators-based van der Waals heterostructures
• Dependence of nonlocal Gilbert damping on the ferromagnetic layer type in FM/Cu/Pt heterostructures
• Highly efficient spin-to-charge current conversion at room temperature in strained HgTe surface states
• Unveiling the polarity of the spin-to-charge current conversion in $B{i}_{2}S{e}_3$
• Universal scaling for the spin-electricity conversion on surface states of topological insulators
• Efficient Edelstein effects in one-atom-layer Tl-Pb compound

Cited by in corpus (5)

• Spin-orbit readout using thin films of topological insulator Sb2Te3 deposited by industrial magnetron sputtering
• Exploiting the close-to-Dirac point shift of Fermi level in Sb2Te3/Bi2Te3 topological insulator heterostructure for spin-charge conversion
• Giant spin-charge conversion in ultrathin films of the MnPtSb half-Heusler compound
• Gate-Tunable Spin-to-Charge Conversion in Topological Insulator-Magnetic Insulator Heterostructures at Room Temperature
• Terahertz time-domain signatures of the inverse Edelstein effect in topological-insulator|ferromagnet heterostructures