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| Open AccessAsymmetric C–H Dehydrogenative Alkenylation via a Photo-induced Chiral α‑Imino Radical Intermediate
The direct alkenylation with simple alkenes stands out as the most ideal yet challenging strategy for obtaining high-valued desaturated alkanes. Herein, the authors present a direct asymmetric dehydrogenative α-C(sp3)-H alkenylation of carbonyls based on synergistic photoredox-cobalt-chiral primary amine catalysis under visible light.
- Zongbin Jia
- , Liang Cheng
- & Sanzhong Luo
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Article
| Open AccessTracking nuclear motion in single-molecule magnets using femtosecond X-ray absorption spectroscopy
The authors use femtosecond K-edge X-ray absorption spectroscopy to follow nuclear motion in a manganese-based tri-nuclear single-molecule magnet, and resolve changes in bond lengths on the order of hundreds of ångströms and on sub-picosecond timescales.
- Kyle Barlow
- , Ryan Phelps
- & J. Olof Johansson
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Article
| Open AccessSustainable upcycling of mixed spent cathodes to a high-voltage polyanionic cathode material
Direct recycling of critical battery materials bring promise but a challenge for the mixed cathode chemistries. Here, the authors report a sustainable upcycling approach, transforming degraded LiFePO4 and Mn-rich cathodes into a high-voltage polyanionic material with an increased energy density and economic value.
- Guanjun Ji
- , Di Tang
- & Hui-Ming Cheng
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| Open AccessAtomically dispersed asymmetric cobalt electrocatalyst for efficient hydrogen peroxide production in neutral media
The relationship between the structural configurations of M-N-C electrocatalysts and their performances in neutral environments has been insufficiently investigated. Here the authors demonstrate that an ultralow metal-loaded Co-N-C electrocatalyst, featuring the asymmetric Co-C/N/O configuration, exhibit exceptional efficiency in electrochemically producing hydrogen peroxide under neutral conditions.
- Longxiang Liu
- , Liqun Kang
- & Guanjie He
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Article
| Open AccessDynamics of growing carbon nanotube interfaces probed by machine learning-enabled molecular simulations
There is a lack of atomic level insight on the role of defects on carbon nanotubes' growth. Here, authors present a machine learning force field to drive near-microsecond simulations the entire growth process of this material, unveiling mechanisms of defect formation and healing.
- Daniel Hedman
- , Ben McLean
- & Feng Ding
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Article
| Open AccessSpin-orbit torque manipulation of sub-terahertz magnons in antiferromagnetic α-Fe2O3
Antiferromagnetic spintronics offer high speed operations, and reduced issues with stray fields compared to ferromagnetic systems, however, antiferromagnets are typically more challenging to manipulate electrically. Here, Yang, Kim, and coauthors demonstrate electrical control of magnon dispersion and frequency in an α-Fe2O3/Pt heterostructure.
- Dongsheng Yang
- , Taeheon Kim
- & Hyunsoo Yang
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Article
| Open AccessUltrastrong magnon-magnon coupling and chiral spin-texture control in a dipolar 3D multilayered artificial spin-vortex ice
Extending magnetic nanostructures into three dimensions offers a vast increase in potential functionalities, but this typically comes at the expense of ease of fabrication and measurement. Here, Dion et al. demonstrate an approach to creating three dimensional magnetic nanostructures while retaining easy fabrication and readout of established two dimensional approaches.
- Troy Dion
- , Kilian D. Stenning
- & Jack C. Gartside
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Article
| Open AccessElectric-field tunable Type-I to Type-II band alignment transition in MoSe2/WS2 heterobilayers
Photoluminescence and photocurrent measurements indicate that MoSe2/WS2 hetero-bilayers can be switched from type-I to type-II band alignment by applying a vertical electric field.
- Jed Kistner-Morris
- , Ao Shi
- & Nathaniel Gabor
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Article
| Open AccessCrown ether decorated silicon photonics for safeguarding against lead poisoning
Lead toxification in society is a public health crisis. The exposure to lead poisoning gives rise to a multitude of health issues. In this work, a chip-scale photonic platform that enables the highly quantitative detection of lead is demonstrated.
- Luigi Ranno
- , Yong Zen Tan
- & Jia Xu Brian Sia
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Article
| Open AccessThree-dimensional liquid metal-based neuro-interfaces for human hippocampal organoids
Providing a suitable multi-electrode array (MEA) for free-floating neural organoids is a great challenge. Here, authors present a mesh soft stretchable MEA for recording neural signals in human hippocampal organoids derived from induced pluripotent stem cells.
- Yan Wu
- , Jinhao Cheng
- & Xingyu Jiang
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Article
| Open AccessEnabling 3D CT-scanning of cultural heritage objects using only in-house 2D X-ray equipment in museums
Visualising the structure of museum objects is a crucial step in understanding the origin, state, and composition of cultural heritage artifacts. Here the authors present an approach for creating computed tomography reconstructions using only standard 2D radiography equipment already available in most larger museums.
- Francien G. Bossema
- , Willem Jan Palenstijn
- & K. Joost Batenburg
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Article
| Open AccessOptical vectorial-mode parity Hall effect: a case study with cylindrical vector beams
This study uses a customized metasurface to unveil a distinct parity Hall effect in degenerate optical vectorial modes. This work realizes the advances in meta-devices and showcases new possibilities for manipulating optical fields based on parity.
- Changyu Zhou
- , Weili Liang
- & Xiaocong Yuan
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Article
| Open AccessLead-free dual-frequency ultrasound implants for wireless, biphasic deep brain stimulation
Ultrasound-driven bioelectronics offer a wireless scheme for implants. Here, the authors reported a lead-free dual-frequency ultrasound implants for wireless, biphasic deep brain stimulation.
- Qian Wang
- , Yusheng Zhang
- & Jiagang Wu
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Article
| Open AccessPlasma electron acceleration driven by a long-wave-infrared laser
The laser pulses that drive most laser wakefield accelerators have wavelengths near 1 micrometer and peak power > 100 terawatts. Here, the authors drive plasma wakes with 10 micrometer, 2-terawatt pulses, yielding relativistic electron beams with a collimated, narrow-energy-bandwidth component.
- R. Zgadzaj
- , J. Welch
- & M. C. Downer
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| Open AccessSynergistic growth of nickel and platinum nanoparticles via exsolution and surface reaction
Utilizing “Chemistry at a point”, Ni is exsolved from a perovskite lattice under deposited Pt nanoparticles. This yields even smaller Ni Pt alloy nanoparticles on a perovskite nanofiber structure, exhibiting high catalytic activity.
- Min Xu
- , Yukwon Jeon
- & John T. S. Irvine
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Article
| Open AccessMechanically controlled multifaceted dynamic transformations in twisted organic crystal waveguides
Crystals with mechanical responses are of interest, but often only one or two dynamic motions can be achieved with one crystal. Here, the authors report a combination of dynamic movements in naturally twisted optical waveguiding microcrystals.
- Mehdi Rohullah
- , Vuppu Vinay Pradeep
- & Rajadurai Chandrasekar
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Article
| Open AccessRapid and scalable photocatalytic C(sp2)–C(sp3) Suzuki−Miyaura cross-coupling of aryl bromides with alkyl boranes
In recent years a growing demand for drug design approaches that incorporate a higher number of sp3-hybridized carbons fuelled the development of innovative cross-coupling strategies to reliably introduce aliphatic fragments. Here, the authors present a powerful approach for the light-mediated B-alkyl Suzuki−Miyaura crosscoupling between alkyl boranes and aryl bromides.
- Ting Wan
- , Luca Capaldo
- & Timothy Noël
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Article
| Open AccessRapid and on-site wireless immunoassay of respiratory virus aerosols via hydrogel-modulated resonators
Infectious respiratory viruses have been an everlasting threaten to public health. Here, authors report a wireless immunoassay technology based on immuno-responsive hydrogel-modulated resonant sensors, which facilitate on-site respiratory virus surveillance.
- Xin Li
- , Rujing Sun
- & Qingjun Liu
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| Open AccessElectrochemical-repaired porous graphene membranes for precise ion-ion separation
The preparation of atom-thick lattices with Å-scale pores is desirable for achieving ion selectivity and high ion flux. Here authors present a cm-scale membrane made of atom-thick graphene film hosting zero-dimensional pores spanning only a few Å, repaired using an in situ electrochemical strategy, yielding high Li+/Mg2+ separation performance.
- Zongyao Zhou
- , Kangning Zhao
- & Kumar Varoon Agrawal
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Article
| Open AccessIdentifying regions of importance in wall-bounded turbulence through explainable deep learning
Understanding the role of coherent structures in the dynamics of turbulent flows is of high relevance for fluid dynamics, climate systems, and aerodynamics. The authors propose a deep learning approach to evaluate the importance of various types of coherent structure in the flow, to uncover main mechanisms of wall-bounded turbulence and develop techniques for its control.
- Andrés Cremades
- , Sergio Hoyas
- & Ricardo Vinuesa
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Article
| Open AccessCoherent electric field control of orbital state of a neutral nitrogen-vacancy center
Color centers in diamond have been proposed as a link between remote superconducting units in hybrid quantum systems, where their orbital degree of freedom is utilized. Here the authors report coherent electric-field control of the orbital state of a neutral NV center in diamond.
- Hodaka Kurokawa
- , Keidai Wakamatsu
- & Hideo Kosaka
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| Open AccessTailoring amorphous boron nitride for high-performance two-dimensional electronics
Here, the authors demonstrate a wafer-scale, low-temperature process using atomic layer deposition, for the synthesis of uniform, conformal amorphous boron nitride (aBN) thin films. They further fabricate aBN-encapsulated monolayer MoS2 field-effect transistors.
- Cindy Y. Chen
- , Zheng Sun
- & Joshua A. Robinson
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Article
| Open AccessIntegrated and DC-powered superconducting microcomb
Here the authors have developed a superconducting microwave frequency comb that is fully integrated, easy to manufacture, and operates with ultra-low power consumption, and could significantly advance microwave photonics and quantum processor integration.
- Chen-Guang Wang
- , Wuyue Xu
- & Peiheng Wu
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Article
| Open AccessSnail-inspired water-enhanced soft sliding suction for climbing robots
By mimicking the strong adhesive locomotion ability of snails, the authors present a sliding suction method to allow robots to climb with high adhesive force and low energy consumption up walls and on ceilings.
- Tianqi Yue
- , Hermes Bloomfield-Gadêlha
- & Jonathan Rossiter
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Article
| Open AccessTuning instability in suspended monolayer 2D materials
Tuning the instabilities of 2D materials can control their wrinkling behavior for interesting physical properties, but still challenging. Here, the authors report a push-to-shear experimental approach to control the wrinkling patterns of monolayer 2D materials and measure their bending stiffness.
- Yuan Hou
- , Jingzhuo Zhou
- & Yang Lu
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Article
| Open AccessUltra-narrowband and rainbow-free mid-infrared thermal emitters enabled by a flat band design in distorted photonic lattices
Narrowband thermal emitters realized with photonic nanostructures usually suffer from the rainbow effect. Here, the authors demonstrate rainbow-free thermal emissions with high temporal coherence through harnessing flatband high-Q resonances.
- Kaili Sun
- , Yangjian Cai
- & Zhanghua Han
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Article
| Open AccessA multifunctional smart field-programmable radio frequency surface
A field-programmable radio frequency surface (FPRFS) is proposed that can implement arbitrary antennas and impedance matching networks. An asymmetric excitation scheme is demonstrated to ensure radiation efficiency independent of the number of FPRFS switches.
- Tianzhi Li
- , Yang Yu
- & Efstratios Skafidas
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Article
| Open AccessOxidative photocatalysis on membranes triggers non-canonical pyroptosis
Oxidative damage to intracellular membrane proteins is critical to cells. Here, the authors use a water-oxidizing photocatalyst, generating ∙OH even under hypoxia, to show that membrane-specific protein oxidation triggers pyroptosis via non-canonical inflammasomes.
- Chaiheon Lee
- , Mingyu Park
- & Tae-Hyuk Kwon
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Article
| Open AccessDynamic microvilli sculpt bristles at nanometric scale
Bristleworms possess dedicated cells that can synthesize highly stereotypical bristles with sub-micrometric precision. Here, Ikeda and colleagues shed light on the underlying dynamics of cellular protrusions, revealing an extension-disassembly cycle that resembles a 3D printer.
- Kyojiro N. Ikeda
- , Ilya Belevich
- & Florian Raible
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| Open AccessA cell-free nutrient-supplemented perfusate allows four-day ex vivo metabolic preservation of human kidneys
As demand for organ transplants exceeds availability there has been an unmet need to extend preservation of deceased donor kidneys. Here, the authors show that a cell-free nutrient-supplemented perfusate allows 4-day preservation of human kidneys using spatially resolved lipidomics and metabolomics.
- Marlon J. A. de Haan
- , Marleen E. Jacobs
- & Ton J. Rabelink
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| Open AccessThe roll-to-roll revolution to tackle the industrial leap for perovskite solar cells
Roll-to-Roll (R2R) coating is a technology that potentially enhances throughput, reduces costs, and accommodates flexible substrates for fabricating various types of solar cells and modules. Here, authors discuss the R2R revolution to tackle the industrial leap for perovskite photovoltaic devices.
- Ershad Parvazian
- & Trystan Watson
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| Open AccessGiant magneto-photoluminescence at ultralow field in organic microcrystal arrays for on-chip optical magnetometer
The optical detection of magnetic fields is difficult for low field strengths. Here, the authors show how strong magneto-photoluminescence can be achieved in rubrene microcrystals and demonstrate its application in a magnetometer.
- Hong Wang
- , Baipeng Yin
- & Chuang Zhang
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Article
| Open AccessCavity-enhanced photon indistinguishability at room temperature and telecom wavelengths
Carbon nanotube-based single photon emitters allow for room-temperature operation, but suffer from vanishing indistinguishability due to strong dephasing. Following a theoretical proposal, the authors tackle the problem experimentally by using a cavity to enhance the photon coherence time and the emission spectral density in the regime of incoherent good cavity-coupling.
- Lukas Husel
- , Julian Trapp
- & Alexander Högele
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| Open AccessUnconventional magnetism mediated by spin-phonon-photon coupling
Here Pantazopoulos, Feist, García-Vidal, and Kamra explore the combination spin, phonon and photon coupling in a system of magnetic nanoparticles, and find that it leads to an emergent spin-spin interaction. This interaction is long-range and leads to an unconventional form of magnetism that can exhibit strong magnetization at temperatures very close to the critical temperature.
- Petros Andreas Pantazopoulos
- , Johannes Feist
- & Akashdeep Kamra
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| Open AccessFirefly-inspired bipolar information indication system actuated by white light
Inspired by fireflies, a bimodal information indication system using a photochemical afterglow material within a photonic crystal matrix is developed to display both static and changing information, such as sample type and degree of degradation.
- Hanwen Huang
- , Jiamiao Yin
- & Changchun Wang
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| Open AccessOperando Raman spectroscopy uncovers hydroxide and CO species enhance ethanol selectivity during pulsed CO2 electroreduction
Controlling the selectivity of the electroreduction of CO2 to value-added products is challenging. Here, authors use sub-second operando Raman spectroscopy to analyze Cu catalyst surfaces and discover the pivotal role of co-adsorbed OH and CO in enhancing ethanol selectivity.
- Antonia Herzog
- , Mauricio Lopez Luna
- & Beatriz Roldan Cuenya
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Article
| Open AccessHighest fusion performance without harmful edge energy bursts in tokamak
Damaging energy bursts in a tokamak are a major obstacle to achieving stable high-fusion performance. Here, the authors demonstrate the use of adaptive and machine-learning control to optimize the 3D magnetic field to prevent edge bursts and maximize fusion performance in two different fusion devices, DIII-D and KSTAR.
- S. K. Kim
- , R. Shousha
- & E. Kolemen
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Article
| Open AccessHigh-temperature concomitant metal-insulator and spin-reorientation transitions in a compressed nodal-line ferrimagnet Mn3Si2Te6
The coupling between topological electronic properties and magnetic order offers a promising route for magnetoelectric control with great potential for both applications and fundamental physics. Here, Susilo et al demonstrate the rich tunability of magnetic properties in nodal-line magnetic semiconductor Mn3Si2Te6 using pressure as control knob.
- Resta A. Susilo
- , Chang Il Kwon
- & Jun Sung Kim
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Article
| Open AccessCoherent optical coupling to surface acoustic wave devices
Surface acoustic wave devices enable modern electronics and are desirable for quantum systems. Here the authors access and control these devices optically, enabling high acoustic quality factors, materials spectroscopy, and hybrid quantum systems.
- Arjun Iyer
- , Yadav P. Kandel
- & William H. Renninger
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Article
| Open AccessRegulation of cerebral blood flow boosts precise brain targeting of vinpocetine-derived ionizable-lipidoid nanoparticles
Despite advances in active drug-targeting for blood-brain barrier penetration, challenges related to brain biodistribution, and drug accumulation persist. Here the authors show a molecular library design centered on cyclic tertiary amine compounds and develop a self-enhanced brain-targeted nucleic acid delivery system inspired by the neuroprotective properties of vinpocetine.
- Xufei Bian
- , Ling Yang
- & Chong Li
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Article
| Open AccessA fully autonomous robotic ultrasound system for thyroid scanning
Current thyroid ultrasounds rely heavily on the experience and skills of the sonographer and of the radiologist, and the process is physically and cognitively exhausting. Here, the authors show a fully autonomous robotic ultrasound system, which is able to scan thyroid regions without human assistance and identify malignant nodules.
- Kang Su
- , Jingwei Liu
- & Peter Xiaoping Liu
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Article
| Open AccessPolar Bloch points in strained ferroelectric films
Authors predict polar Bloch points with negative capacitance in tensile-strained ultrathin ferroelectric PbTiO3 film by phase-field simulations, observing their polarization structures by scanning transmission electron microscopic imaging.
- Yu-Jia Wang
- , Yan-Peng Feng
- & Xiu-Liang Ma
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Article
| Open AccessUnconventional superconductivity without doping in infinite-layer nickelates under pressure
The authors theoretically study the pressure dependence of the phase diagram of the nickelate PrNiO2 with and without Sr doping. At high pressure, they find that the superconducting dome is significantly enhanced in both Tc and doping-range of superconductivity compared with ambient pressure, with a maximal Tc of 100 K around 100 GPa in absence of external doping.
- Simone Di Cataldo
- , Paul Worm
- & Karsten Held
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Article
| Open AccessVitrification-enabled enhancement of proton conductivity in hydrogen-bonded organic frameworks
Proton conduction is one of the interesting applications of hydrogen-bonded organic frameworks. Here, the authors report hydrogen-bonded organic framework that can be transformed into glassy state, effectively mitigating grain boundary effects, and significantly enhancing proton conduction performance.
- Feng-Fan Yang
- , Xiao-Lu Wang
- & Linfeng Liang
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Article
| Open AccessDeciphering complexity in Pd–catalyzed cross-couplings
Knowledge about the full reaction signature, such as the complete profile of products and side-products is important in accelerating discovery chemistry. Here, the authors report a methodology using high-throughput experimentation and multivariate data analysis to examine Palladium- catalyzed cross-coulpling reactions.
- George E. Clarke
- , James D. Firth
- & Ian J. S. Fairlamb
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Article
| Open AccessNested non-covalent interactions expand the functions of supramolecular polymer networks
Supramolecular polymer networks have unique and useful properties due to the reversible nature of their cross-links. Here, the authors show that when two distinct supramolecular interaction classes exist within a single cross-link, new functions can result.
- David J. Lundberg
- , Christopher M. Brown
- & Jeremiah A. Johnson
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| Open AccessHalide Perovskite Inducing Anomalous Nonvolatile Polarization in Poly(vinylidene fluoride)-based Flexible Nanocomposites
Wang et al. report large nonvolatile polarization in stretchable polymer ferroelectrics incorporating perovskite nanocrystals. The built-in electric field from poled ferroelectrics stabilises Frenkel defects via interfacial coupling, which can also enhance the polarization of nonferroelectrics.
- Yao Wang
- , Chen Huang
- & Jiangyu Li
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Article
| Open AccessOvercoming strength-ductility tradeoff with high pressure thermal treatment
Conventional material processing methods often suffer by strength-ductility trade-off. Here, the authors show high-pressure and high-temperature treatment can transform an eutectic high entropy alloy to having a hierarchical microstructure with simultaneous enhancements of strength and ductility.
- Yao Tang
- , Haikuo Wang
- & Haofei Zhou
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Article
| Open AccessSpin-orbit-splitting-driven nonlinear Hall effect in NbIrTe4
Previous work proposed the Berry curvature dipole as the mechanism of the nonlinear Hall effect. Lee et al. establish the sign-changing Berry curvature hot spots from spin-orbit split bands as the origin of the Berry curvature dipole and link it to the nonlinear Hall effect in the topological semimetal NbIrTe4.
- Ji-Eun Lee
- , Aifeng Wang
- & Hyejin Ryu