Nature Search

Optical-helicity-driven magnetization dynamics in metallic ferromagnets

Optical switching of ferromagnets has attracted interest for use in ultrafast spintronics but the physical origin of the effect remains unclear. Here the authors determine the contributions of two proposed mechanisms, the inverse Faraday effect and optical spin-transfer torque.

Gyung-Min Choi
André Schleife
David G. Cahill
ResearchOpen Access18 Apr 2017
Nature Communications

Volume: 8, P: 1-7
Optical spin-orbit torque in heavy metal-ferromagnet heterostructures

It is known that torques can be exerted on spins in a ferromagnet (FM) layer when an in-plane electric current is injected into a heavy metal (HM) layer in contact with the FM layer. Here, the authors demonstrate that torques can be generated without the current injection by shining instead circularly polarized light on the HM.

Gyung-Min Choi
Jung Hyun Oh
Hyun-Woo Lee
ResearchOpen Access20 Mar 2020
Nature Communications

Volume: 11, P: 1-7
Observation of the orbital Hall effect in a light metal Ti

The orbital Hall effect is observed in the light metal titanium, confirming the orbital Hall effect and indicating that orbital angular momentum is an important degree of freedom in solids.

Young-Gwan Choi
Daegeun Jo
Hyun-Woo Lee
Research05 Jul 2023
Nature

Volume: 619, P: 52-56
Spin current generated by thermally driven ultrafast demagnetization

Spin currents can be generated by passing electric currents through ferromagnets, but the process is too slow for ultrafast spintronics. Here, the authors show an approach for laser-driven thermal spin generation that has the potential to attain much higher speeds.

Gyung-Min Choi
Byoung-Chul Min
David G. Cahill
Research10 Jul 2014
Nature Communications

Volume: 5, P: 1-8
Spin-torque-driven gigahertz magnetization dynamics in the non-collinear antiferromagnet Mn₃Sn

An optically induced spin current pulse induces gigahertz magnetization dynamics in Mn₃Sn with a spin coherence length of approximately 15 nm, which is longer than in ferromagnets.

Won-Bin Lee
Seongmun Hwang
Gyung-Min Choi
Research03 Feb 2025
Nature Nanotechnology

Volume: 20, P: 487-493
Spin current driven by ultrafast magnetization of FeRh

In some magnetic materials, it is possible to magnetize or demagnetize the system on extremely short timescales. The angular momentum carried by the magnetic state must be generated or dissipated. Here, Kang et al find a significant correlation between spin current and the magnetization dynamics in the ultrafast magnetization processes, implying angular momentum transfer from electrons to magnons.

Kyuhwe Kang
Hiroki Omura
Gyung-Min Choi
ResearchOpen Access29 Jun 2023
Nature Communications

Volume: 14, P: 1-8
Thermal spin-transfer torque driven by the spin-dependent Seebeck effect in metallic spin-valves

The spin-dependent Seebeck effect converts thermal gradients into spin currents. It is now shown that this effect can be used to drive spin-transfer torques on picosecond timescales using the heat currents created by ultrafast pulses of laser light.

Gyung-Min Choi
Chul-Hyun Moon
David G. Cahill
Research08 Jun 2015
Nature Physics

Volume: 11, P: 576-581
Association of metabolic dysfunction-associated steatotic liver disease and steatosis-associated fibrosis estimator with subclinical coronary atherosclerosis: observation cohort study

Joonho Jeong
Seungbong Han
Neung Hwa Park
ResearchOpen Access10 Jul 2025
Scientific Reports

Volume: 15, P: 1-13
Differential impact of lipoprotein(a) on subclinical coronary atherosclerosis in asymptomatic individuals with and without diabetes mellitus

Mi-Hee Jang
Sangwoo Park
Gyung-Min Park
ResearchOpen Access01 Jul 2025
Scientific Reports

Volume: 15, P: 1-8
Engineering electrode interfaces for telecom-band photodetection in MoS₂/Au heterostructures via sub-band light absorption

Near-infrared light absorption in 2D materials can be engineered using electrode fabrication methods, which were exploited to construct sensitive telecom-band photodetectors based on MoS₂.

Chengyun Hong
Saejin Oh
Ji-Hee Kim
ResearchOpen Access23 Nov 2023
Light: Science & Applications

Volume: 12, P: 1-11
Proposing a new solution for marine debris by utilizing on-board low-temperature eco-friendly pulverization system

Dong-Ha Lee
Sungkyun Park
Jae-Myung Lee
ResearchOpen Access21 Dec 2021
Scientific Reports

Volume: 11, P: 1-13
Thermal transport in layer-by-layer assembled polycrystalline graphene films

David Estrada
Zuanyi Li
Eric Pop
ResearchOpen Access05 Mar 2019
npj 2D Materials and Applications

Volume: 3, P: 1-7
Spintronics meets orbitronics: Emergence of orbital angular momentum in solids

Daegeun Jo
Dongwook Go
Hyun-Woo Lee
ReviewsOpen Access28 Jun 2024
npj Spintronics

Volume: 2, P: 1-9
Evaluation of the incremental prognostic value of the combination of CYP2C19 poor metabolizer status and ABCB1 3435 TT polymorphism over conventional risk factors for cardiovascular events after drug-eluting stent implantation in East Asians

Mahn-Won Park
Sung Ho Her
Kiyuk Chang
Research23 Dec 2015
Genetics in Medicine

Volume: 18, P: 833-841

Search

Optical-helicity-driven magnetization dynamics in metallic ferromagnets

Optical spin-orbit torque in heavy metal-ferromagnet heterostructures

Observation of the orbital Hall effect in a light metal Ti

Spin current generated by thermally driven ultrafast demagnetization

Spin-torque-driven gigahertz magnetization dynamics in the non-collinear antiferromagnet Mn₃Sn

Spin current driven by ultrafast magnetization of FeRh

Thermal spin-transfer torque driven by the spin-dependent Seebeck effect in metallic spin-valves

Association of metabolic dysfunction-associated steatotic liver disease and steatosis-associated fibrosis estimator with subclinical coronary atherosclerosis: observation cohort study

Differential impact of lipoprotein(a) on subclinical coronary atherosclerosis in asymptomatic individuals with and without diabetes mellitus

Engineering electrode interfaces for telecom-band photodetection in MoS₂/Au heterostructures via sub-band light absorption

Proposing a new solution for marine debris by utilizing on-board low-temperature eco-friendly pulverization system

Thermal transport in layer-by-layer assembled polycrystalline graphene films

Spintronics meets orbitronics: Emergence of orbital angular momentum in solids

Evaluation of the incremental prognostic value of the combination of CYP2C19 poor metabolizer status and ABCB1 3435 TT polymorphism over conventional risk factors for cardiovascular events after drug-eluting stent implantation in East Asians

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