Control of charge-spin interconversion in van der Waals heterostructures with chiral charge density waves

Abstract

A charge density wave (CDW) represents an exotic state in which electrons are arranged in a long range ordered pattern in low-dimensional materials. Although our understanding of the fundamental character of CDW has been enriched after extensive studies, its relationship with functional phenomena remains relatively limited. Here, we show an unprecedented demonstration of a tunable charge-spin interconversion (CSI) in graphene/1T-TaS${}_2$ van der Waals heterostructures by manipulating the distinct CDW phases in 1T-TaS${}_2$. Whereas CSI from spins polarized in all three directions are observed in the heterostructure when the CDW phase does not show commensurability, the output of one of the components disappears and the other two are enhanced when the CDW phase becomes commensurate. The experimental observation is supported by first-principles calculations, which evidence that chiral CDW multidomains are at the origin of the switching of CSI. Our results uncover a new approach for on-demand CSI in low-dimensional systems, paving the way for advanced spin-orbitronic devices.

Funding information: Marie Sklodowska-Curie Actions, H2020-MSCA-ITN-2020; Project Acronym SPEAR; Grant Agreement No. 955671

References in corpus (45)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Van der Waals heterostructures
• Advanced capabilities for materials modelling with Quantum ESPRESSO
• Spin torque switching with the giant spin Hall effect of tantalum
• Maximally-localized Wannier functions for entangled energy bands
• New Perspectives for Rashba Spin-Orbit Coupling
• Wannier90 as a community code: new features and applications
• Graphene Spintronics
• Spin Transfer Torque Generated by the Topological Insulator Bi_2Se_3
• Room Temperature Reversible Spin Hall Effect
• Control of spin-orbit torques through crystal symmetry in WTe2/ferromagnet bilayers
• Van der Waals heterostructures for spintronics and opto-spintronics
• Colloquium: Spintronics in graphene and other two-dimensional materials
• Intrinsic spin Hall effect in platinum metal
• Resonant x-ray scattering studies of charge order in cuprates
• Weyl Node and Spin Texture in Trigonal Tellurium and Selenium
• Room temperature spin Hall effect in graphene/MoS${}_2$ van der Waals heterostructures
• Charge-to-Spin Conversion by the Rashba-Edelstein Effect in 2D van der Waals Heterostructures up to Room Temperature
• Spin transport in graphene/transition metal dichalcogenide heterostructures
• Calculation of intrinsic spin Hall conductivity by Wannier interpolation
• SOT-MRAM 300mm integration for low power and ultrafast embedded memories
• Band insulator to Mott insulator transition in 1T-TaS${}_2$
• Tunable room-temperature spin galvanic and spin Hall effects in van der Waals heterostructures
• Radial spin texture in elemental tellurium with chiral crystal structure
• Unconventional charge-spin conversion in Weyl-semimetal WTe2
• Optimal charge-to-spin conversion in graphene on transition metal dichalcogenides
• Spin Hall effect and Weak Antilocalization in Graphene/Transition Metal Dichalcogenide Heterostructures
• Large multi-directional spin-to-charge conversion in low symmetry semimetal MoTe${}_2$ at room temperature
• Unconventional spin Hall effects in nonmagnetic solids
• Correlated electronic states at domain walls of a Mott-charge-density-wave insulator 1T-TaS2
• Spin-orbit magnetic state readout in scaled ferromagnetic/heavy metal nanostructures
• Generation of spin currents and spin densities in systems with reduced symmetry
• Covariant conservation laws and the spin Hall effect in Dirac-Rashba systems
• Gate tunability of highly efficient spin-to-charge conversion by spin Hall effect in graphene proximitized with WSe${}_2$
• Emergent Honeycomb Network of Topological Excitations in Correlated Charge Density Wave
• Visualization of Chiral Electronic Structure and Anomalous Optical Response in a Material with Chiral Charge Density Waves
• Large room temperature spin-to-charge conversion signals in a few-layer graphene/Pt lateral heterostructure
• Charge-to-spin conversion in twisted graphene/WSe${}_2$ heterostructures
• Electrical switching of ferro-rotational order in nano-thick 1T-TaS${}_2$ crystals
• Unconventional charge-to-spin conversions in graphene/MoTe2 van der Waals heterostructures
• Omnidirectional spin-to-charge conversion in graphene/NbSe${}_2$ van der Waals heterostructures
• Resolving spin currents and spin densities generated by charge-spin interconversion in systems with reduced crystal symmetry
• Spin-orbit and exchange proximity couplings in graphene/1T-TaS${}_2$ heterostructure triggered by a charge density wave
• The electric pulses induced multi-resistance states in the hysteresis temperature range of 1T-TaS2 and 1T-TaS1.6Se0.4
• Nonperturbative approach to interfacial spin-orbit torques induced by Rashba effect

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