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Strong Vertical Piezoelectricity and Broad-pH-Value Photocatalyst in Ferroelastic Y2Se2BrF Monolayer. 铁弹性 Y2Se2BrF 单层中的强垂直压电性和宽 PH 值光催化剂。
IF 9.6 1区 材料科学
Nano Letters Pub Date : 2024-07-12 DOI: 10.1021/acs.nanolett.4c01943
Qi-Wen He, Jun-Hui Wang, Dan-Yang Zhu, Dai-Song Tang, Zengtao Lv, Feng Guo, Xiao-Chun Wang
{"title":"Strong Vertical Piezoelectricity and Broad-pH-Value Photocatalyst in Ferroelastic Y<sub>2</sub>Se<sub>2</sub>BrF Monolayer.","authors":"Qi-Wen He, Jun-Hui Wang, Dan-Yang Zhu, Dai-Song Tang, Zengtao Lv, Feng Guo, Xiao-Chun Wang","doi":"10.1021/acs.nanolett.4c01943","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c01943","url":null,"abstract":"<p><p>With the development of miniaturized devices, there is an increasing demand for 2D multifunctional materials. Six ferroelastic semiconductors, Y<sub>2</sub>Se<sub>2</sub><i>XX'</i> (<i>X</i>, <i>X'</i> = I, Br, Cl, or F; <i>X</i> ≠ <i>X'</i>) monolayers, are theoretically predicted here. Their in-plane anisotropic band structure, elastic and piezoelectric properties can be switched by ferroelastic strain. Moderate energy barriers can prevent the undesired ferroelastic switching that minor interferences produce. These monolayers exhibit high carrier mobilities (up to 10<sup>4</sup> cm<sup>2</sup> V<sup>-1</sup> s<sup>-1</sup>) with strong in-plane anisotropy. Furthermore, their wide bandgaps and high potential differences make them broad-pH-value and high-performance photocatalysts at pH value of 0-14. Strikingly, Y<sub>2</sub>Se<sub>2</sub>BrF possesses outstanding <i>d</i><sub>33</sub> (<i>d</i><sub>33</sub> = -405.97 pm/V), greatly outperforming CuInP<sub>2</sub>S<sub>6</sub> by 4.26 times. Overall, the nano Y<sub>2</sub>Se<sub>2</sub>BrF is a hopeful candidate for multifunctional devices to generate a direct current and achieve solar-free photocatalysis. This work provides a new paradigm for the design of multifunctional energy materials.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":9.6,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141589008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sono-blasting Triggered Cascading-Amplification of Oxidative Stress for Enhanced Interventional Therapy of Hepatocellular Carcinoma 超声爆破触发氧化应激级联放大,加强肝细胞癌的介入治疗
IF 10.8 1区 材料科学
Nano Letters Pub Date : 2024-07-12 DOI: 10.1021/acs.nanolett.4c02027
Dong Li, Kexin Zhang, Kaiyang Wang, Renmiao Peng, Xijian Liu, Yamei Miao, Yuanpei Lan, Ruizhi Wang, Lile Dong, Yu Luo
{"title":"Sono-blasting Triggered Cascading-Amplification of Oxidative Stress for Enhanced Interventional Therapy of Hepatocellular Carcinoma","authors":"Dong Li, Kexin Zhang, Kaiyang Wang, Renmiao Peng, Xijian Liu, Yamei Miao, Yuanpei Lan, Ruizhi Wang, Lile Dong, Yu Luo","doi":"10.1021/acs.nanolett.4c02027","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c02027","url":null,"abstract":"Interventional therapy is widely regarded as a highly promising treatment approach for nonsurgical liver cancer. However, the development of drug resistance and tolerance to hypoxic environments after embolization can lead to increased angiogenesis, enhanced tumor cell stemness, and greater invasiveness, resulting in metastasis and recurrence. To address these challenges, a novel approach involving the use of lecithin and DSPE-PEG comodified Ca<sup>2+</sup> loaded (NH<sub>4</sub>)<sub>2</sub>S<sub>2</sub>O<sub>8</sub> (LDCNSO) drug in combination with transcatheter arterial embolization (TAE) has been proposed. The sono-blasting effect of LDCNSO under ultrasound triggers a cascading amplification of oxidative stress, by releasing sulfate radical (·SO<sub>4</sub><sup>–</sup>), hydroxyl radical (·OH), and superoxide (·O<sub>2</sub><sup>–</sup>), inducing Ca<sup>2+</sup> overload, and reducing glutathione (GSH) levels, which eventually leads to apoptosis. LDCNSO alongside TAE has demonstrated remarkable therapeutic efficacy in the rabbit orthotopic cancer model, resulting in significant inhibition of tumor growth. This research provides valuable insights for the effective treatment of orthotopic tumors.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":10.8,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141597553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Separators Modified with Ultrathin Montmorillonite/Polymer Nanocoatings Achieve Dendrite-Free Lithium Deposition at High Current Densities. 使用超薄蒙脱石/聚合物纳米涂层改性的分离器可在高电流密度下实现无枝晶的锂沉积。
IF 9.6 1区 材料科学
Nano Letters Pub Date : 2024-07-12 DOI: 10.1021/acs.nanolett.4c01221
Ying Zhang, Yicheng Hua, Guoqiang Zhao, Feiyue Tu, Tianbao Li, Mitch Guijun Li, Liangjie Fu, Caihong Yang, Aidong Tang, Huaming Yang
{"title":"Separators Modified with Ultrathin Montmorillonite/Polymer Nanocoatings Achieve Dendrite-Free Lithium Deposition at High Current Densities.","authors":"Ying Zhang, Yicheng Hua, Guoqiang Zhao, Feiyue Tu, Tianbao Li, Mitch Guijun Li, Liangjie Fu, Caihong Yang, Aidong Tang, Huaming Yang","doi":"10.1021/acs.nanolett.4c01221","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c01221","url":null,"abstract":"<p><p>Fatal dendritic growth in lithium metal batteries is closely related to the composition and thickness of the modified separator. Herein, an ultrathin nanocoating composed of monolayer montmorillonite (MMT), poly(vinyl alcohol) (PVA) on a polypropylene separator is prepared. The MMT was exfoliated into monolayers (only 0.96 nm) by intercalating PVA under ultrasound, followed by cross-linking with glutaraldehyde. The thickness of the nanocoating on the polypropylene separator, as determined using the pull-up method, is only 200-500 nm with excellent properties. As a result, the lithium-symmetric battery composed of it has a low overpotential (only 40 mV) and a long lifespan of more than 7900 h at high current density, because ion transport is unimpeded and Li<sup>+</sup> flows uniformly through the ordered ion channels between the MMT layers. Additionally, the separator exhibited excellent cycling stability in Li-S batteries. This study offers a new idea for fabricating ultrathin clay/polymer modified separators for metal anode stable cycling at high current densities.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":9.6,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141597945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Lattice Distortion Promotes Incipient Plasticity in Multiprincipal Element Alloys 晶格畸变促进多元素合金的初期塑性
IF 10.8 1区 材料科学
Nano Letters Pub Date : 2024-07-12 DOI: 10.1021/acs.nanolett.4c02086
Luling Wang, Yang Cao, Yonghao Zhao
{"title":"Lattice Distortion Promotes Incipient Plasticity in Multiprincipal Element Alloys","authors":"Luling Wang, Yang Cao, Yonghao Zhao","doi":"10.1021/acs.nanolett.4c02086","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c02086","url":null,"abstract":"Multiprincipal element alloys usually exhibit earlier pop-in events than pure metals and dilute solid solutions during nanoindentation experiments. To understand the origin of this phenomenon, large-scale atomic simulations of nanoindentation were performed on a series of metallic materials to investigate the underlying physics of incipient plasticity at the nanoscale. Statistical result shows that lattice distortion δ and normalized critical pressure <i>p</i><sub>c</sub>/<i>E</i><sub>s</sub> follow a power-law relationship. Via quantitative analysis on the relative positions of the atoms within the nearest neighbor shell, the physical origin of premature incipient plasticity is revealed as severe lattice distortion induces large relative atomic displacement, so only a small indentation strain is required to meet the critical displacement threshold that triggers incipient plasticity. Therefore, for perfect crystals, lattice distortion is an intrinsic and determinative factor that affects the first pop-in event.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":10.8,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141597554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Electrochemically Programmable Metasurface with Independently Controlled Metasurface Pixels at Optical Frequencies. 在光学频率下可独立控制元表面像素的电化学可编程元表面。
IF 9.6 1区 材料科学
Nano Letters Pub Date : 2024-07-12 DOI: 10.1021/acs.nanolett.4c02536
Robin Kaissner, Benjamin Renz, Frank Neubrech, Yueqiang Hu, Na Liu
{"title":"An Electrochemically Programmable Metasurface with Independently Controlled Metasurface Pixels at Optical Frequencies.","authors":"Robin Kaissner, Benjamin Renz, Frank Neubrech, Yueqiang Hu, Na Liu","doi":"10.1021/acs.nanolett.4c02536","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c02536","url":null,"abstract":"<p><p>Metasurfaces have revolutionized optical technologies by offering powerful, compact, and versatile solutions to control light. Conducting polymers, characterized by their conjugated molecular structures, facilitate charge transport and exhibit interesting electrical, optical, and mechanical properties. Integrating conducting polymers with optical metasurfaces can unlock new opportunities and functionalities in modern optics. In this work, we demonstrate an electrochemically programmable metasurface with independently controlled metasurface pixels at optical frequencies. Electrochemical modulation of locally conjugated polyaniline on gold nanorods, which are arranged on addressable electrodes according to the Pancharatnam-Berry phase design, enables dynamic control over the metasurface pixels into programmable configurations. With the same metasurface device, we showcase diverse optical functions, including dynamic beam diffraction and varifocal lensing along and off the optical axis. The synergy between flat optics and conducting polymer science holds immense potential to enhance the performance and function versatility of metasurfaces, paving the way for innovative optical applications.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":9.6,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141589005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tuning Exciton Emission via Ferroelectric Polarization at a Heterogeneous Interface between a Monolayer Transition Metal Dichalcogenide and a Perovskite Oxide Membrane 通过单层过渡金属二掺杂物与过氧化物膜之间的异质界面上的铁电极化调谐激子发射
IF 10.8 1区 材料科学
Nano Letters Pub Date : 2024-07-12 DOI: 10.1021/acs.nanolett.4c01853
Jaehong Choi, Kevin J. Crust, Lizhong Li, Kihong Lee, Jialun Luo, Jae-Pil So, Kenji Watanabe, Takashi Taniguchi, Harold Y. Hwang, Kin Fai Mak, Jie Shan, Gregory D. Fuchs
{"title":"Tuning Exciton Emission via Ferroelectric Polarization at a Heterogeneous Interface between a Monolayer Transition Metal Dichalcogenide and a Perovskite Oxide Membrane","authors":"Jaehong Choi, Kevin J. Crust, Lizhong Li, Kihong Lee, Jialun Luo, Jae-Pil So, Kenji Watanabe, Takashi Taniguchi, Harold Y. Hwang, Kin Fai Mak, Jie Shan, Gregory D. Fuchs","doi":"10.1021/acs.nanolett.4c01853","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c01853","url":null,"abstract":"We demonstrate the integration of a thin BaTiO<sub>3</sub> (BTO) membrane with monolayer MoSe<sub>2</sub> in a dual-gate device that enables in situ manipulation of the BTO ferroelectric polarization with a voltage pulse. While two-dimensional (2D) transition metal dichalcogenides (TMDs) offer remarkable adaptability, their hybrid integration with other families of functional materials beyond the realm of 2D materials has been challenging. Released functional oxide membranes offer a solution for 2D/3D integration via stacking. 2D TMD excitons can serve as a local probe of the ferroelectric polarization in BTO at a heterogeneous interface. Using photoluminescence (PL) of MoSe<sub>2</sub> excitons to optically read out the doping level, we find that the relative population of charge carriers in MoSe<sub>2</sub> depends sensitively on the ferroelectric polarization. This finding points to a promising avenue for future-generation versatile sensing devices with high sensitivity, fast readout, and diverse applicability for advanced signal processing.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":10.8,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141597552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exceptional Rate Performances of Li-Rich Mn-Based Cathodes Enabled by Boron-Based Additives-Driven Self-Optimized Interface 通过硼基添加剂驱动的自优化界面实现富锰基锂离子阴极的卓越速率性能
IF 10.8 1区 材料科学
Nano Letters Pub Date : 2024-07-12 DOI: 10.1021/acs.nanolett.4c01104
Kang Ma, Yu Cao, Shaojie Zhang, Yiming Zhang, Siyu Fang, Xinpeng Han, Fengmin Jin, Jie Sun
{"title":"Exceptional Rate Performances of Li-Rich Mn-Based Cathodes Enabled by Boron-Based Additives-Driven Self-Optimized Interface","authors":"Kang Ma, Yu Cao, Shaojie Zhang, Yiming Zhang, Siyu Fang, Xinpeng Han, Fengmin Jin, Jie Sun","doi":"10.1021/acs.nanolett.4c01104","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c01104","url":null,"abstract":"Li-rich Mn-based cathode material (LRM), as a promising cathode for high energy density lithium batteries, suffers from severe side reactions in conventional lithium hexafluorophosphate (LiPF<sub>6</sub>)-based carbonate electrolytes, leading to unstable interfaces and poor rate performances. Herein, a boron-based additives-driven self-optimized interface strategy is presented to dissolve low ionic conductivity LiF nanoparticles at the outer cathode electrolyte interface, leading to the optimized interfacial components, as well as the enhanced Li ion migration rate in electrolytes. Being attributed to these superiorities, the LRM||Li battery delivers a high-capacity retention of 92.19% at 1C after 200 cycles and a low voltage decay of 1.08 mV/cycle. This work provides a new perspective on the rational selection of functional additives with an interfacial self-optimized characteristic to achieve a long lifespan LRM with exceptional rate performances.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":10.8,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141597551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nonstoichiometry Induced Amorphous Grain Boundary of Na5SmSi4O12 Solid-State Electrolyte for Long-Life Dendrite-Free Sodium Metal Battery. 用于长寿命无枝晶金属钠电池的 Na5SmSi4O12 固态电解质的非化学计量诱导非晶晶界
IF 9.6 1区 材料科学
Nano Letters Pub Date : 2024-07-11 DOI: 10.1021/acs.nanolett.4c01743
Boqian Yi, Zhixuan Wei, Wanqing Jia, Ge Sun, Wenzhe Si, Shiyu Yao, Gang Chen, Fei Du
{"title":"Nonstoichiometry Induced Amorphous Grain Boundary of Na<sub>5</sub>SmSi<sub>4</sub>O<sub>12</sub> Solid-State Electrolyte for Long-Life Dendrite-Free Sodium Metal Battery.","authors":"Boqian Yi, Zhixuan Wei, Wanqing Jia, Ge Sun, Wenzhe Si, Shiyu Yao, Gang Chen, Fei Du","doi":"10.1021/acs.nanolett.4c01743","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c01743","url":null,"abstract":"<p><p>Oxide ceramics are considered promising candidates as solid electrolytes (SEs) for sodium metal batteries. However, the high sintering temperature induced boundaries and pores between angular grains lead to high grain boundary resistance and pathways for dendrite growth. Herein, we report a grain boundary modification strategy, which <i>in situ</i> generates an amorphous matrix among Na<sub>5</sub>SmSi<sub>4</sub>O<sub>12</sub> oxide grains via tuning the chemical composition. The mechanical properties as well as electron mitigating capability of modified SE have been significantly enhanced. As a result, the SE achieves a room-temperature total ionic conductivity of 5.61 mS cm<sup>-1</sup>, the highest value for sodium-based oxide SEs. The Na|SE|Na symmetric cell achieves a high critical current density of 2.5 mA cm<sup>-2</sup> and excellent cycle life over more than 2800 h at 0.15 mA cm<sup>-2</sup> without dendrite formation. The full cell with Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> as the cathode demonstrates impressive cycling performance, maintaining stability over 3000 cycles at 5C without observable loss of capacity.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":9.6,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141589007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cu(II) Specifically Disassembles Insulin Amyloid Nanostructures via Direct Interaction with Cross-β Fibrils. Cu(II)通过与交叉β纤维直接相互作用,特异性地分解胰岛素淀粉样蛋白纳米结构。
IF 9.6 1区 材料科学
Nano Letters Pub Date : 2024-07-11 DOI: 10.1021/acs.nanolett.4c00113
Shikha Mittal, Kailash Prasad Prajapati, Masihuzzaman Ansari, Kajal Joshi, Nishant Mishra, Om Prakash Mahato, Bibin Gnanadhason Anand, Karunakar Kar
{"title":"Cu(II) Specifically Disassembles Insulin Amyloid Nanostructures via Direct Interaction with Cross-β Fibrils.","authors":"Shikha Mittal, Kailash Prasad Prajapati, Masihuzzaman Ansari, Kajal Joshi, Nishant Mishra, Om Prakash Mahato, Bibin Gnanadhason Anand, Karunakar Kar","doi":"10.1021/acs.nanolett.4c00113","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c00113","url":null,"abstract":"<p><p>In this work, we demonstrate direct evidence of the antiamyloid potential of Cu(II) ions against amyloid formation of insulin. The Cu(II) ions were found to efficiently disassemble the preformed amyloid nanostructures into soluble species and suppress monomer fibrillation under aggregation-prone conditions. The direct interaction of Cu(II) ions with the cross-β structure of amyloid fibrils causes substantial disruption of both the interchain and intrachain interactions, predominantly the H-bonds and hydrophobic contacts. Further, the Cu(II) ions show a strong affinity for the aggregation-prone conformers of the protein and inhibit their spontaneous self-assembly. These results reveal the possible molecular mechanism for the antiamyloidogenic potential of Cu(II) which could be important for the development of metal-ion specific therapeutic strategies against amyloid linked complications.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":9.6,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141578270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Magnetic Structure-Dependent Ultrafast Spin Relaxation in Magnet CrI3: A Time-Domain ab Initio Study. 磁性 CrI3 中与磁结构有关的超快自旋弛豫:时域 ab Initio 研究。
IF 9.6 1区 材料科学
Nano Letters Pub Date : 2024-07-11 DOI: 10.1021/acs.nanolett.4c01809
Haoran Lu, Run Long
{"title":"Magnetic Structure-Dependent Ultrafast Spin Relaxation in Magnet CrI<sub>3</sub>: A Time-Domain ab Initio Study.","authors":"Haoran Lu, Run Long","doi":"10.1021/acs.nanolett.4c01809","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c01809","url":null,"abstract":"<p><p>Two-dimensional magnet CrI<sub>3</sub> is a promising candidate for spintronic devices. Using nonadiabatic molecular dynamics and noncollinear spin time-dependent density functional theory, we investigated hole spin relaxation in two-dimensional CrI<sub>3</sub> and its dependence on magnetic configurations, impacted by spin-orbit and electron-phonon interactions. Driven by in-plane and out-of-plane iodine motions, the relaxation rates vary, extending from over half a picosecond in ferromagnetic systems to tens of femtoseconds in certain antiferromagnetic states due to significant spin fluctuations, associated with the nonadiabatic spin-flip in tuning to the adiabatic flip. Antiferromagnetic CrI<sub>3</sub> with staggered layer magnetic order notably accelerates adiabatic spin-flip due to enhanced state degeneracy and additional phonon modes. Ferrimagnetic CrI<sub>3</sub> shows a transitional behavior between ferromagnetic and antiferromagnetic types as the magnetic moment changes. These insights into the spin dynamics of CrI<sub>3</sub> underscore its potential for rapid-response spintronic applications and advance our understanding of two-dimensional materials for spintronics.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":9.6,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141578273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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