Electrical Control of Valley-Zeeman Spin-Orbit-Coupling-Induced Spin Precession at Room Temperature.

  title={Electrical Control of Valley-Zeeman Spin-Orbit-Coupling-Induced Spin Precession at Room Temperature.},
  author={Josep Ingla-Ayn'es and Franz Herling and Jaroslav Fabian and Luis E. Hueso and F{\`e}lix Casanova},
  journal={Physical review letters},
  volume={127 4},
The ultimate goal of spintronics is achieving electrically controlled coherent manipulation of the electron spin at room temperature to enable devices such as spin field-effect transistors. With conventional materials, coherent spin precession has been observed in the ballistic regime and at low temperatures only. However, the strong spin anisotropy and the valley character of the electronic states in 2D materials provide unique control knobs to manipulate spin precession. Here, by manipulating… 

Figures and Tables from this paper

Spin injection by spin–charge coupling in proximity induced magnetic graphene

Within the field of spintronics major efforts are directed towards developing applications for spin-based transport devices made fully out of two-dimensional materials. In this work we present an

Gate-Voltage-Modulated Spin Precession in Graphene/WS2 Field-Effect Transistors

Transition metal dichalcogenide materials are studied to investigate unexplored research avenues, such as spin transport behavior in 2-dimensional materials due to their strong spin-orbital

Omnidirectional spin-to-charge conversion in graphene/NbSe2 van der Waals heterostructures

The conversion of spin currents polarized in different directions into charge currents is a keystone for novel spintronic devices. Van der Waals heterostructures with tailored symmetry are a very

Topological insulator spin transistor

When a charge current is injected into the surface state of a topological insulator (TI), the resulting shift of the spin-momentum-locked Fermi surface leads to the appearance of a net spin

Accessing the spin structure of buried electronic states

In spin- and angle-resolved photoemission spectroscopy (SARPES) the energy-momentum dispersion of electronic states in crystalline solids is measured along with the spin direction of the photoemitted

Experimental observation of spin−split energy dispersion in high-mobility single-layer graphene/WSe2 heterostructures

Proximity-induced spin–orbit coupling in graphene has led to the observation of intriguing phenomena like time-reversal invariant $${{\mathbb{Z}}}_{2}$$ Z 2 topological phase and spin-orbital

Towards fully two-dimensional spintronic devices

Within the field of spintronics major efforts are directed towards developing applications for spin-based transport devices made fully out of two-dimensional (2D) materials. In this work we present

Spin Control Without Magnetic Fields

Researchers demonstrate that they can control the polarization direction of a spin current without having to apply a magnetic field, which could aid in implementing energy-efficient spintronics



Electrical detection of coherent spin precession using the ballistic intrinsic spin Hall effect.

The experiments show that the ballistic spin Hall effect can be used for efficient injection or detection of spin polarized electrons, thereby enabling the development of an integrated spin transistor.

Tunable room-temperature spin galvanic and spin Hall effects in van der Waals heterostructures

Strongly enhanced room-temperature spin-to-charge interconversion in graphene driven by the proximity of WS 2 and electric-field tunability is demonstrated.

Control of Spin Precession in a Spin-Injected Field Effect Transistor

The injection and detection of spin between two ferromagnetic contacts are demonstrated and how the magnitude of the spin-current between the source and drain contacts can be controlled by a voltage applied to a gate is shown.

Spin Hall Effect Transistor

The utility of the spin Hall effect in a microelectronic device geometry, realizes the spin transistor with electrical detection directly along the gated semiconductor channel, and provides an experimental tool for exploring spin Hall and spin precession phenomena in an electrically tunable semiconductor layer are shown.

A two-dimensional spin field-effect switch

This paper demonstrates an approach that differs from previous proposals such as the Datta and Das modulator, and that is based on a van de Waals heterostructure of atomically thin graphene and semiconducting MoS2, that allows switching of the spin current in the graphene channel between ON and OFF states.

Spin inversion in graphene spin valves by gate-tunable magnetic proximity effect at one-dimensional contacts

Gate-tunable spin transport in encapsulated graphene-based spin valves with one-dimensional ferromagnetic edge contacts with magnetization reversal by an applied magnetic field or a high-density spin-polarized current is demonstrated.

Electrical gate control of spin current in van der Waals heterostructures at room temperature

An all-electrical spintronic device at room temperature with the creation, transport and control of the spin in 2D materials heterostructures, which can be key building blocks in future device architectures are demonstrated.

Room-Temperature Spin Hall Effect in Graphene/MoS2 van der Waals Heterostructures.

This work unambiguously demonstrates experimentally the spin Hall effect in graphene induced by MoS2 proximity and for varying temperatures up to room temperature, paving the way toward the combination of spin information transport and spin-to-charge conversion in two-dimensional materials.

Contact-induced spin relaxation in Hanle spin precession measurements

In the field of spintronics the "conductivity mismatch" problem remains an important issue. Here the difference between the resistance of ferromagnetic electrodes and a (high resistive) transport

Spin–orbit magnetic state readout in scaled ferromagnetic/heavy metal nanostructures

The efficient detection of a magnetic state at nanoscale dimensions is important for the development of spin-logic devices. Magnetoresistance effects can be used to detect magnetic states, but they