Article
Physics, Applied
O. Alves Santos, F. Feringa, K. S. Das, J. Ben Youssef, B. J. van Wees
Summary: This study reports the control of magnon conductivity modulation efficiency in yttrium iron garnet through magnon spin injection from a ferromagnetic metal permalloy. The enhancement of modulation efficiency is attributed to the anomalous spin Hall effect, which is maximized when the Py magnetization is perpendicular to the charge current. Interestingly, the modulation efficiency of thermally generated magnons exhibits an opposite behavior than expected.
PHYSICAL REVIEW APPLIED
(2021)
Article
Chemistry, Physical
X-Y Wei, O. Alves Santos, C. H. Sumba Lusero, G. E. W. Bauer, J. Ben Youssef, B. J. van Wees
Summary: This study reports a giant magnon conductivity in thin yttrium iron garnet films. By reducing the number of occupied two-dimensional subbands from a large number to a few, a transition from three-dimensional to two-dimensional magnon transport is achieved. The high conductivity obtained offers opportunities for developing low-dissipation magnon-based spintronic devices.
Article
Physics, Applied
Seondo Park, Yun Daniel Park
Summary: The study measured the spin current generated in platinum by the spin Nernst effect, highlighting the importance of device geometry in all-metallic systems. By using ferromagnetic metal contacts as spin accumulation detectors, the researchers successfully quantitatively separated the spin Nernst signal from the parasitic anomalous Nernst voltage.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Multidisciplinary
Zhejunyu Jin, Xianglong Yao, Zhenyu Wang, H. Y. Yuan, Zhaozhuo Zeng, Weiwei Wang, Yunshan Cao, Peng Yan
Summary: It has been discovered that hidden nonlinear magnon transport in magnetic textures can generate fictitious magnetic fields. By analyzing the scattering features between magnons and skyrmions, a significant Hall angle in both confluence and splitting modes has been predicted, and it has been found that the Hall angle reverses its sign when switching the handedness of the incident magnons. This finding may open up new possibilities for probing gauge fields through nonlinear means.
PHYSICAL REVIEW LETTERS
(2023)
Review
Nanoscience & Nanotechnology
Libor Smejkal, Allan H. MacDonald, Jairo Sinova, Satoru Nakatsuji, Tomas Jungwirth
Summary: This review organizes the current understanding of anomalous antiferromagnetic materials that generate a Hall effect and discusses their applications in spintronics, topological condensed matter, and multipole magnetism.
NATURE REVIEWS MATERIALS
(2022)
Article
Physics, Applied
Yajuan Hui, Jun Lu, Hui Jiang, Weinan Lin, Chao Dong, Kaifeng Dong, Qiang He, Xiangshui Miao
Summary: In this study, the magnetic texture of exfoliated van der Waals FePS3 was investigated using spin Hall magnetoresistance (SMR) measurements. The results showed that the SMR signal exhibited a negative feature corresponding to antiferromagnetic SMR during in-plane field rotations, while the perpendicular field induced changes in the SMR signal due to canted spins. These findings provide important guidance for further research on the magnetic texture of van der Waals antiferromagnetic materials using the SMR approach.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Physics, Applied
M. K. Zhao, C. H. Wan, X. M. Luo, Y. Z. Wang, T. Y. Ma, W. L. Yang, Y. Zhang, L. Yin, G. Q. Yu, X. F. Han
Summary: Spin logics offer a shortcut to logic-in-memory architectures by independently controlling magnetization of in-plane and perpendicular layers without an external magnetic field. Experimental construction of five Boolean logic gates in a single device in a field-free condition marks progress towards practical spin-orbit torque logics.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Pieter M. Gunnink, Rembert A. Duine, Andreas Rueckriegel
Summary: In this study, we derived the anomalous Hall contributions from dipolar interactions in magnetic insulators, revealing the role of magnons as carriers of angular momentum in diffusive spin transport. We calculated the anomalous and magnon spin conductivities for yttrium iron garnet (YIG) thin films, showing a finite anomalous Hall conductivity for a magnetic field perpendicular to the film. Moreover, we demonstrated the possibility of electrical detection and injection of spin, predicting experimentally measurable Hall coefficients for a variety of temperatures and magnetic field strengths.
Article
Physics, Multidisciplinary
X. R. Wang
Summary: The authors demonstrate an anomalous spin Hall and inverse spin Hall effect, predicting the generation of spin currents with different directions in magnetic systems. This offers potential applications in spintronics for generating spin currents with various polarization orientations.
COMMUNICATIONS PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
M. Mehraeen, Steven S. -L. Zhang
Summary: This study predicts the existence of spin anomalous-Hall unidirectional magnetoresistance (AH-UMR) in conducting bilayers composed of a ferromagnetic layer and a nonmagnetic layer, which is different from the well-studied unidirectional spin-Hall magnetoresistance and is mainly derived from the spin anomalous Hall effect in the ferromagnetic layer. It is found that the charge-spin conversion induced by the spin anomalous Hall effect and the structural inversion asymmetry generate a net nonequilibrium spin density in the ferromagnetic layer, which modulates the resistance of the bilayer when the direction of the applied current or the magnetization is reversed.
Article
Physics, Multidisciplinary
Ping Li, Jing-Zhao Zhang, Zhi-Xin Guo, Tai Min, Xiangrong Wang
Summary: Charge-spin interconversion in magnetic materials is investigated by using first-principles calculations, and a new spin Hall effect is discovered, with the relationship between the order parameter, spin Berry curvature, and spin Hall conductivity revealed.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2023)
Article
Materials Science, Multidisciplinary
Oliver Busch, Boerge Goebel, Ingrid Mertig
Summary: The spin Hall effect is typically associated with spin-orbit interaction, but it can also occur in specific materials even in absence of spin-orbit coupling. Coplanar kagome antiferromagnets Mn3X are interesting candidates for applications involving spin currents. The main contribution to the intrinsic spin Hall signal in these materials comes from noncollinear magnetic texture and is most significant in coplanar systems. Furthermore, spin-orbit coupling or out-of-plane tilting of magnetic moments can effectively reduce the spin Hall effect.
Article
Materials Science, Multidisciplinary
Roberto E. Troncoso, Mike A. Lund, Arne Brataas, Akashdeep Kamra
Summary: The study investigates spin pumping from a van der Waals antiferromagnet to a normal metal, revealing unique spin phenomena. By measuring the spin current components, the complex behavior of spin-mixing conductances and magnon modes coupling can be detected. Interface engineering can lead to unconventional spin currents and open up new opportunities in this hybrid system.
Article
Physics, Applied
Sajid Husain, Nicholas Figueiredo-Prestes, Olivier Fayet, Sophie Collin, Florian Godel, Eric Jacquet, Nicolas Reyren, Henri Jaffres, Jean-Marie George
Summary: Ferrimagnetic insulators (FIMIs) are promising materials for spin-orbit torque (SOT) devices due to their ability to propagate a spin current without Ohmic losses. The origin of the anomalous Hall effect (AHE) in FIMI/heavy metal (HM) systems has remained unclear. In this study, we demonstrate that the AHE and spin Hall magnetoresistance (SMR) in FIMI/HM bilayer heterostructures have the same origin.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Anish Rai, M. Benjamin Jungfleisch
Summary: We demonstrate the influence of damping and field-like torques in the magnon-photon coupling process using classical integration of the generalized Landau-Lifshitz-Gilbert equation and RLC equation. By considering the phase correlation between dynamic magnetization and microwave current, we show that the gap between two hybridized modes can be controlled by changing the direction of the dc current density J in samples with damping parameter in the order of 10(-3). Our results suggest the feasibility of experimental realization of the proposed magnon-photon coupling control mechanism in yttrium iron garnet/Pt hybrid structures.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Physics, Applied
K. S. Das, F. K. Dejene, B. J. van Wees, I. J. Vera-Marun
APPLIED PHYSICS LETTERS
(2019)
Article
Chemistry, Multidisciplinary
Kumar Sourav Das, Denys Makarov, Paola Gentile, Mario Cuoco, Bart J. van Wees, Carmine Ortix, Ivan J. Vera-Marun
Review
Physics, Applied
Jean-Francois Dayen, Soumya J. Ray, Olof Karis, Ivan J. Vera-Marun, M. Venkata Kamalakar
APPLIED PHYSICS REVIEWS
(2020)
Review
Physics, Multidisciplinary
A. Avsar, H. Ochoa, F. Guinea, B. Ozyilmaz, B. J. Van Wees, I. J. Vera-Marun
REVIEWS OF MODERN PHYSICS
(2020)
Article
Physics, Applied
H. J. Waring, N. A. B. Johansson, I. J. Vera-Marun, T. Thomson
PHYSICAL REVIEW APPLIED
(2020)
Article
Chemistry, Multidisciplinary
Dina Abdul Wahab, Mathias Augustin, Samuel Manas Valero, Wenjun Kuang, Sarah Jenkins, Eugenio Coronado, Irina V. Grigorieva, Ivan J. Vera-Marun, Efren Navarro-Moratalla, Richard F. L. Evans, Kostya S. Novoselov, Elton J. G. Santos
Summary: The study of 2D van der Waals material CrI3 reveals the importance of quantum effects in describing the properties of low-dimensional magnetic compounds. Biquadratic exchange interactions are crucial for quantitatively describing the magnetism of CrI3, while quantum rescaling corrections are needed to reproduce its thermal properties.
ADVANCED MATERIALS
(2021)
Article
Physics, Applied
O. Alves Santos, F. Feringa, K. S. Das, J. Ben Youssef, B. J. van Wees
Summary: This study reports the control of magnon conductivity modulation efficiency in yttrium iron garnet through magnon spin injection from a ferromagnetic metal permalloy. The enhancement of modulation efficiency is attributed to the anomalous spin Hall effect, which is maximized when the Py magnetization is perpendicular to the charge current. Interestingly, the modulation efficiency of thermally generated magnons exhibits an opposite behavior than expected.
PHYSICAL REVIEW APPLIED
(2021)
Article
Physics, Applied
J. C. Toscano-Figueroa, N. Natera-Cordero, D. A. Bandurin, C. R. Anderson, V. H. Guarochico-Moreira, I. Grigorieva, I. J. Vera-Marun
Summary: The study demonstrates a method of fabricating ultrathin tunnel-barrier contacts to graphene by chemically functionalizing graphene, leading to enhanced spin-injection efficiency and addressing the resistance mismatch issue in spintronic devices.
PHYSICAL REVIEW APPLIED
(2021)
Article
Chemistry, Multidisciplinary
Victor H. Guarochico-Moreira, Jose L. Sambricio, Khalid Omari, Christopher R. Anderson, Denis A. Bandurin, Jesus C. Toscano-Figueroa, Noel Natera-Cordero, Kenji Watanabe, Takashi Taniguchi, Irina Grigorieva, Ivan J. Vera-Marun
Summary: Spin injection and tunable spin signal in graphene have been achieved using van der Waals heterostructures with one-dimensional (1D) contacts. This architecture prevents significant doping from the contacts, enabling high-quality graphene channels. At low temperature, spin signals can be enhanced by electrostatic gating.
Review
Engineering, Electrical & Electronic
Paola Gentile, Mario Cuoco, Oleksii M. Volkov, Zu-Jian Ying, Ivan J. Vera-Marun, Denys Makarov, Carmine Ortix
Summary: This article reviews the development of electronic materials with nanoscale curved geometries, examines the effects of shape, confinement, and strain, and explores how to utilize these effects in electronic, spintronic, and superconducting devices. The article also discusses the methods required for synthesizing and characterizing curvilinear nanostructures and highlights key areas for future development in curved electronics.
NATURE ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
H. J. Waring, Y. Li, C. Moutafis, I. J. Vera-Marun, T. Thomson
Summary: Researchers have found that synthetic ferromagnets have a unique layer structure, where the dynamic response of the ferromagnetic layers is closely related to the difference in magnetization and interlayer coupling. Experimental results demonstrate that conventional acoustic and optical descriptions do not fully capture the complexities of synthetic ferromagnets' dynamics.
Article
Materials Science, Multidisciplinary
Matteo Carrega, Ivan J. Vera-Marun, Alessandro Principi
Article
Materials Science, Multidisciplinary
K. S. Das, F. Feringa, M. Middelkamp, B. J. van Wees, I. J. Vera-Marun