Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Valence Bond Theory

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Reconstruction of magnon eigenfunctions by X-ray magnetic vector chronoscopy.

Nature nanotechnology·2026

Same author

Interfacial Coexistence of Superconductivity and Magnetism in NbN/Ti/MnBi<sub>2</sub>Te<sub>4</sub> Heterostructures.

ACS applied materials & interfaces·2026

Same author

Tunable chiral magneto-transport through band structure engineering in magnetic topological insulators Mn(Bi<sub>1-</sub>Sb<i></i>)<sub>2</sub>Te<sub>4</sub>.

Science advances·2025

Same author

Unusually High Occupation of Co 3d State in Magnetic Weyl Semimetal Co<sub>3</sub>Sn<sub>2</sub>S<sub>2</sub>.

ACS nano·2025

Same author

Controllable magnetism and an anomalous Hall effect in (Bi<sub>1-<i>x</i></sub>Sb<sub><i>x</i></sub>)<sub>2</sub>Te<sub>3</sub>-intercalated MnBi<sub>2</sub>Te<sub>4</sub> multilayers.

Nanoscale·2025

Same author

Correction to "Rolling Motion of Rigid Skyrmion Crystallites Induced by Chiral Lattice Torque".

Nano letters·2025

Search research articles

Related Experiment Video

Updated: Jun 14, 2026

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

Spin pumping through nanocrystalline topological insulators.

David M Burn¹, Jheng-Cyuan Lin², Ryuji Fujita²

¹Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom.

|March 22, 2023

Summary

This summary is machine-generated.

Nanocrystalline topological insulators (TIs) enhance spin pumping for spintronic devices. This study demonstrates efficient spin current transfer through TIs using x-ray ferromagnetic resonance, overcoming limitations of single-crystalline films.

Keywords:

ferromagnetic resonance nanocrystalline quantum materials spin pumping topological insulators x-ray magnetic circular dichroism

More Related Videos

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

Published on: April 12, 2018

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

Related Experiment Videos

Last Updated: Jun 14, 2026

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

Published on: April 12, 2018

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

Area of Science:

Condensed Matter Physics
Materials Science
Spintronics

Background:

Topological surface states (TSSs) in topological insulators (TIs) enable dissipationless spin transport.
Conventional spintronic devices like spin valves use trilayer structures with ferromagnetic (FM) and non-magnetic layers.
Single-crystalline TIs have limited spin pumping efficiency due to a single spin-momentum locked channel.

Purpose of the Study:

To investigate the potential of nanocrystalline TI films for enhanced spin pumping.
To demonstrate efficient spin current transfer through TI layers in a FM/TI/FM heterostructure.

Main Methods:

Fabrication of nanocrystalline TI films with grain sizes preventing TSS hybridization.
Utilized element-selective, x-ray based ferromagnetic resonance (XFMR) spectroscopy.
Measured spin pumping from a FM layer, through the TI layer, and into a second FM layer (spin sink).

Main Results:

Demonstrated successful spin pumping from a ferromagnetic layer through a topological insulator.
Showcased efficient spin current transfer into a second ferromagnetic layer acting as a spin sink.
Nanocrystalline TI films provide multiple spin channels, enhancing spin pumping efficiency compared to single-crystalline films.

Conclusions:

Nanocrystalline TI films are promising for improving spin current generation and transfer in spintronic devices.
The study validates the use of XFMR for probing spin dynamics in TI-based heterostructures.
This approach offers a pathway to more efficient spintronic devices by leveraging the unique properties of TIs.