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Charge density waves in the 2.5-dimensional quantum heterostructure

Physical Review B 2025年第4期111卷 L041101-L041101页

作者： F. Z. Yang T. T. Zhang F. Y. Meng H. C. Lei C. Nelson Y. Q. Cai E. Vescovo A. H. Said P. M. Lozano Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100190 China School of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices Renmin University of China Beijing 100872 China Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education) Renmin University of China Beijing 100872 China National Synchrotron Light Source II Brookhaven National Laboratory Upton New York 11973 USA Advanced Photon Source Argonne National Laboratory Lemont Illinois 60439 USA

Charge density wave (CDW) and their interplay with correlated and topological quantum states are at the forefront of condensed matter research. The 4Hb−TaS2 is a CDW ordered quantum heterostructure that is formed by alternative stacking of Mott insulating 1T-TaS2 and Ising superconducting 1H-TaS2. While the 13×13 and 3×3 CDWs have been respectively observed in the bulk 1T-TaS2 and 2H-TaS2, the CDWs and their pivotal role for unconventional superconductivity in the 4Hb−TaS2 remain unsolved. In this Letter, we reveal the two-dimensional (2D) 13×13 chiral CDW in the 1T layers and intraunit cell coupled 2D 2×2 CDW in the 1H and 1H' layers of 4Hb−TaS2. Our results establish 4Hb−TaS2 a 2.5D quantum heterostructure, where 2D quantum states emerge from 3D crystalline structure.

关键词： Charge density waves

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Mild photothermal therapy-enhanced nano-ferroptosis inducer for potent treatment of advanced prostate cancer

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Nano Research 2025年第4期18卷 375-387页

作者： Xiao Hu Fei Li Xin-Hang Qian Yu-Sen Zhang Shuai Ke Yun-Xia Jin Shuai Yuan Yuan-Yuan Zhang Rui Li Lei Cao Lang Rao Xian-Tao Zeng Ling-Ling Zhang Center for Evidence-Based and Translational Medicine Zhongnan Hospital of Wuhan UniversityWuhan 430071China Institute of Chemical Biology Shenzhen Bay LaboratoryShenzhen 518132China Department of Urology Zhongnan Hospital of Wuhan UniversityWuhan 430071China Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules&College of Chemistry and Chemical EngineeringHubei UniversityWuhan 430062China Xinjiang Key Laboratory of Solid State Physics and Devices School of Physics Science and TechnologyXinjiang UniversityUrumqi 830017China

Androgen deprivation therapy(ADT)and androgen receptor signaling inhibitors(ARSis)often have limited efficacy in patients with advanced prostate cancer(PCa)(especially AR-negative).Inducing ferroptosis in PCa cells is an attractive therapeutic *** this work,mesoporous polydopamine nanoparticles(MPDA NPs)were developed to simultaneously deliver Cu^(+)/Cu^(2+)ion pairs and glutathione peroxidase 4(GPX4)inhibitor RSL3 to tumor sites for enhanced treatment of *** prepared MPDA-Cu-RSL3@HA(MPCRH)NPs induced ferroptosis by promoting lipid peroxidation and regulating phospholipid profiles in PCa cells,and the above effects were further enhanced by mild photothermal therapy(mPTT)without damaging normal *** can promote reactive oxygen species(ROS)generation and degrade tumor extracellular matrix in vivo to promote nanodrugs intratumoral *** short,this work shows the great application potential of mPTT-enhanced nano-ferroptosis inducers in the field of PCa treatment,in order to provide a reasonable paradigm for nanodrug development and PCa treatment.

关键词： prostate cancer ferroptosis mild photothermal therapy chemodynamic therapy mesoporous polydopamine

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A High-Performance Layered/Spinel Heterostructured Cathode Enabled by Ultrafast Joule Heating

SSRN

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SSRN 2023年

作者： Zhu, Wei Su, Hai Bai, Panxing Li, Zhenfei Zhang, Jingchao Zhang, Jinfeng Li, Mengjie Chen, Yanan Xu, Yunhua School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education Tianjin Key Laboratory of Composite and Functional Materials Tianjin University Tianjin300072 China

Spinel LiMn2O4 is one of the most promising cathode materials due to its low cost, high discharge voltage (~4.0 V), and non-toxicity. However, it suffers from insufficient cycling performance caused by irreversible phase transition and Mn dissolution. In addition, the low synthesis efficiency caused by the long heating time also plagues its application and depletes the cost merits of raw materials. Herein, we report a heterostructured cathode material of electrochemically-inert layered Li2MnO3 and active spinel LiMn2O4 phases, which is synthesized in seconds by ultrafast Joule heating. The heterostructure is rapidly formed as a result of the non-equilibrium process produced by the ultrafast Joule heating rate. The inert layered phase serves as a structure stabilization agent to suppress the structure damage and Mn dissolution, thus promising an excellent electrochemical performance with a high capacity retention of 83% after 800 cycles at 5C. Our findings provide an efficient design and synthesis strategy for developing high-performance and low-cost cathode materials. © 2023, The Authors. All rights reserved.

关键词： Lithium-ion batteries

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A facile process to optimize performance of regenerated Nd-Fe-B sintered magnets:Chemo-selective dissolution washing

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Journal of Rare Earths 2023年第12期41卷 1976-1983,I0006页

作者： Haibo Xu Qingmei Lu Lichao Yu Liying Cong Haowen Tian Weiqiang Liu Youhao Liu Yunqiao Wang Jingwu Chen Xiaofei Yi Qiong Wu Ming Yue College of Materials Science&Engineering Key Lab of Advanced Functional MaterialsBeijing University of TechnologyBeijing100124China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou341119China State Key Laboratory of Rare Earth Permanent Magnetic Materials Hefei231500China Earth-Panda Advanced Magnetic Materials Co. Ltd.Hefei231500China Beijing Zhong Ke San Huan Research Beijing102200China

In this work,the recycled Nd-Fe-B powders and regenerated Nd-Fe-B sintered magnets with low impurity content were successfully prepared from Nd-Fe-B magnet sludge via reduction diffusion(RD)method followed by a chemo-selective dissolution washing proc *** chemo-selective dissolution effect of various solution(deionized water,dilute acetic acid solution,NH_(4)Cl-methanol solution) was evaluated by impurity content and magnetic properties of the recycled Nd-Fe-B *** NH_(4)Cl-methanol solution can selectively remove impurities with minimal damage to the magnetic ***,the optimal NH_(4)Cl concentration and liquid-to-solid ratio were *** a consequence,the contents of Ca,O,and H after optimal washing process are reduced to 0.07 wt%,0.31 wt% and 0.22 wt%,***,M_(3) Tis increased to 146.72 emu/g,which is 33% higher than that of the initial ***,the regenerated Nd-Fe-B sintered magnets with properties of B_(r)=11.66 kG,H_(cj)=16.49 kOe,and(BH)_(m)=31.78 MGOe were successfully prepared by mixing with 40 wt% Nd4Fe14B alloy *** with the corresponding regenerated magnets washed with deionized water,the remanence and coercivity are increased by 18% and 59%,respectively.

关键词： Recycling Nd-Fe-B magnet Sludge Chemo-selective dissolution Washing process Magnetic properties Reduction diffusion Rare earths

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范德华材料Ta_(2)Ni_(3)Te_(5)中巨大的面内振动和输运各向异性

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science China Materials 2024年第7期67卷 2201-2209页

作者：谈海歌张颖赵志生王昌龙张冉冉王莎莎马响冯艳谷猛陆亚林姜娟张顺洪向斌 Department of Materials Science&Engineering CAS Key Lab of Materials for Energy ConversionAnhui Laboratory of Advanced Photon Science and TechnologyUniversity of Science and Technology of ChinaHefei 230026China Department of Physics and School of Emerging Technology University of Science and Technology of ChinaHefei 230026China Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field LaboratoryChinese Academy of SciencesHefei 230031China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China International Center for Quantum Design of Functional Materials(ICQD) University of Science and Technology of ChinaHefei 230026China

目前,Ta_(2)M3Te_(5)(M=Ni,Pd)层状范德华化合物可承载各种奇异电子态,且具有表现出非平凡输运现象的诱人潜力,因而重新引起人们的兴趣.其特征有Luttinger液体、量子自旋霍尔效应、高阶拓扑结构和超导电性.本文中,我们报道了单晶Ta_(2)N... 详细信息

目前,Ta_(2)M3Te_(5)(M=Ni,Pd)层状范德华化合物可承载各种奇异电子态,且具有表现出非平凡输运现象的诱人潜力,因而重新引起人们的兴趣.其特征有Luttinger液体、量子自旋霍尔效应、高阶拓扑结构和超导电性.本文中,我们报道了单晶Ta_(2)Ni_(3)Te_(5)的合成,并揭示了其在每个具有准一维键合特征的层内的多重平面内各向异性.我们的技术结合了偏振拉曼光谱、角度分辨光电发射光谱、第一性原理计算和电/磁输运测量的能力.链状低对称层状结构的声子振动产生了高度各向异性的拉曼响应,不同的链内和链间键合特性导致电子带和声学声子的各向异性色散,这共同导致[100]和[001]方向之间的巨大平面内迁移率各向异性(2000%).这一结果与我们的电输运和霍尔效应测量结果相符.因此,沿不同平面内方向的输运行为也表现出不同的温度和磁场依赖性.本工作揭示的丰富的面内各向异性表明,Ta_(2)Ni_(3)Te_(5)是探索新型二维各向异性电子动力学的一个很有前途的平台,在下一代纳米电子器件中具有潜在的应用前景.

关键词： in-plane anisotropy vibrational and electronic transport anisotropy quasi-1D layered structure first-principles calculations angle-resolved photoemission spectroscopy(ARPES)

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Enhanced Magnetic Interaction between Ga and Fe in Two-Dimensional van der Waals Ferromagnetic Crystal Fe_(3)GaTe_(2)

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Chinese Physics Letters 2023年第8期40卷 108-112页

作者：查鹤鸣李炜张高节刘文晶邓力玮姜琦叶茂武浩常海欣乔山 State Key Laboratory of Functional Materials for Informatics Center for Excellence in Superconducting ElectronicsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Department of Physics and State Key Laboratory of Surfac Physics Fudan UniversityShanghai 200433China State Key Laboratory of Material Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Wuhan National High Magnetic Field Center and Institute for Quantum Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Center for Transformative Science ShanghaiTech UniversityShanghai 201210China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Shenzhen R&D Center of Huazhong University of Science and Technology Shenzhen 518000China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

Fe_(3)GaTe_(2),a recently discovered van der Waals ferromagnetic crystal with the highest Curie temperature and strong perpendicular magnetic anisotropy among two-dimensional(2D)magnetic materials,has attracted significant attention and makes it a promising candidate for next-generation spintronic *** with Fe_(3)GeTe_(2),which has the similar crystal structure,the mechanism of the enhanced ferromagnetic properties in Fe_(3)GaTe_(2)is still unclear and needs to be ***,by using x-ray magnetic circular dichroism measurements,we find that both Ga and Te atoms contribute to the total magnetic moment of the system with antiferromagnetic coupling to Fe *** first-principles calculations reveal that Fe_(3)GaTe_(2)has van Hove singularities at the Fermi level in nonmagnetic state,resulting in the magnetic instability of the system and susceptibility to magnetic phase *** addition,the calculation results about the density of states in ferromagnetic states of two materials suggest that the exchange interaction between Fe atoms is strengthened by replacing Ge atoms with Ga *** findings indicate the increase of both the itinerate and local moments in Fe_(3)GaTe_(2)in view of Stoner and exchange interaction models,which results in the enhancement of the overall magnetism and a higher Curie *** work provides insight into the underlying mechanism of Fe_(3)GaTe_(2)’s remarkable magnetic properties and has important implications for searching 2D materials with expected magnetic properties in the future.

关键词： magnetic ferromagnetic mechanism

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Phase evolution and performance analysis of PcBN carbide insert prepared by integrated sintering with different WC-Co alloy substrate

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Ceramics International 2025年第17期51卷 23837-23843页

作者： Liu, Xuechao Chen, Mao Shi, Chunyan Liu, Guoqi Li, Hongxia Wang, Hailong Fan, Bingbing Chen, Yongqiang School of Material Science and Engineering Zhengzhou University Henan 450001 China Luoyang Industrial Technology Research Institute Zhengzhou University Henan 450001 China ZhengZhou New Asia Superhard Material Composite Co. Ltd Henan 450066 China State Key Laboratory of Advanced Refractories Sinosteel Luoyang Institute of Refractories Research Co. Ltd. Henan 471039 China

In this work, polycrystalline cubic boron nitride (PcBN) carbide insert was prepared by a six-anvil high-pressure apparatus at 1500 °C and 5.5 GPa, integrated sintering with different alloy substrates of the Co content. This work studied the effects of different Co content in alloy substrates on phase composition, microstructure, and mechanical properties of the PcBN carbide insert. The result shows that the binder reacted with cBN particles to produce AlN, AlCo, TiB2, W2B, and Co2B. At the same time, transgranular fracture is wide spread in the sintered body. The flexural strength and hardness of the PcBN carbide insert first increase and then fall. When the alloy substrate is WC-11.5 wt% Co, the PcBN carbide insert shows excellent comprehensive performance, with the flexural strength and hardness reaching 1675.67 MPa and 4100.51 Hv, respectively. Through integrated sintering, Co in the alloy substrate diffused and reacted with the binder in the cBN network at the bonding interface, forming a transition area that significantly improves the bonding strength. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： III-V semiconductors

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Regulation of morphology and visible light-driven photocatalysis of WO_(3)nanostructures by changing pH

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Rare Metals 2021年第7期40卷 1738-1745页

作者： You-Shu Fan Xiao-Li Xi Yang-Si Liu Zuo-Ren Nie Lin-Yan Zhao Qing-Hua Zhang College of Materials Science and Engineering Key Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaBeijing University of TechnologyBeijing 100124China National Engineering Laboratory for Industrial Big-data Application Technology Beijing University of TechnologyBeijing 100124China

The controlled preparation of hexagonal tungsten trioxide(h-WO_(3))nanostructures was achieved by adjusting the pH of the precursor *** effect of the pH on the morphology,elemental composition,and photocatalytic performance of the samples was characterized via X-ray diffraction(XRD),scanning electron microscopy,energy dispersive X-ray spectroscopy,and Raman ***-visible(UV-Vis)spectra were used to evaluate the absorbance and the photocatalytic performance of methylene ***(PL),electrochemical impedance spectroscopy,photocurrent response and Brunauer-Emmett-Teller(BET)were used to study the optical properties,electrical performance,and specific surface area of the WO_(3)-nanostructures,*** results indicate that the WO_(3) nanorods prepared at pH=1.0 exhibit the highest photocatalytic performance(87.4%in 1 h),whereas the WO_(3) nanoblocks prepared at p H=3.0 show the *** photocatalytic performance of the one dimensional(1 D)-nanorods can be attributed to their high specific surface area and charge transfer *** h-WO_(3) nanostructures were synthesized via a simple method and without a capping *** show an excellent photocatalytic performance,which is promising for their application in environment purification.

关键词： h-WO_(3) Morphology pH Photocatalysis Charge transfer Optoelectrical properties

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Extremely strong coupling s-wave superconductivity in the medium-entropy alloy TiHfNbTa

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science China(Physics,Mechanics & Astronomy) 2023年第7期66卷 127-135页

作者： Lingyong Zeng Xunwu Hu Mebrouka Boubeche Kuan Li Longfu Li Peifeng Yu Kangwang Wang Chao Zhang Kui Jin Dao-Xin Yao Huixia Luo School of Materials Science and Engineering State Key Laboratory of Optoelectronic Materials and TechnologiesKey Lab of Polymer Composite&Functional MaterialsGuangdong Provincial Key Laboratory of Magnetoelectric Physics and DevicesSun Yat-Sen UniversityGuangzhou 510275China Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices Center for Neutron Science and TechnologySchool of PhysicsSun Yat-Sen UniversityGuangzhou 510275China Songshan Lake Materials Laboratory University Innovation TownDongguan 523808China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Key Laboratory of Vacuum Physics School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing 100049China

Here we report a TiHfNbTa bulk medium-entropy alloy(MEA)superconductor crystallized in the body-centered cubic structure with the unit cell parameter a=3.35925?,which is synthesized by an arc melting *** properties of the TiHfNbTa are studied by employing magnetic susceptibility,resistivity,and specific heat *** results show a bulk superconducting transition temperature(Tc)of around 6.75 *** lower and upper critical fields for TiHfNbTa are45.8 m T and 10.46 T,***-principles calculations show that the d electrons of Ti,Hf,Nb,and Ta are the main contribution to the total density of states near the Fermi *** results indicate that the superconductivity is a conventional swave type with extremely strong coupling(△C_(el)/γ_(n)T_(c)=2.88,2△_(0)/k_(B)T_(c)=5.02,and λ_(ep)=2.77).The extremely strong coupling behavior in the s-wave type Ti Hf Nb Ta MEA superconductor is unusual because it generally happens in cuprates,pnictides,and other unconventional superconductors.

关键词： medium-entropy alloy superconductivity s-wave type TiHfNbTa

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Polybenzimidazole functionalized electrolyte with Li-wetting and self-fluorination functionalities for practical Li metal batteries

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InfoMat 2022年第5期4卷 174-186页

作者： Dongjiang Chen Yuanpeng Liu Chuan Xia Yupei Han Qingwei Sun Xuchang Wang Wei Chen Xian Jian Weiqiang Lv Jianyi Ma Weidong He National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbinChina School of Physics University of Electronic Science and Technology of ChinaChengduChina School of Materials and Energy University of Electronic Science and Technology of ChinaChengduChina Institute of Atomic and Molecular Physics Sichuan UniversityChengduSichuanChina

Rough Li plating,low ionic conductivity,and low thermal stability of conventional electrolytes post-primary challenges for achieving reliable high-capacity rechargeable lithium batteries,for which lithiummetal is frequently proposed as themost promising anode *** low-polarity commercial polypropylene/polyethylene separators fail to support the application of high-energy-density Li anodes due to their rigid physicochemical properties and the high reactivity of Li metal,leading to fatal dendrite formation and vigorous exothermic reaction with ***,we develop a Li-wetting,flame-retardant binary polymer electrolyte by functionalizing poly(vinylidene fluoride)(PVDF)separators with nonflammable polybenzimidazole(PBI)to build safe room-temperature solid-state electrolyte membranes.A dendrite-free LiFePO4 cell with the solid polymer electrolyte(SPE)delivers a discharge capacity of 127 mAh g^(-1) at 25℃ with a capacity retention of 87.5%after 500 cycles at 0.5℃(0.15 mA cm^(-2)).Phase-field simulations and density functional theory calculations demonstrate that the negatively charged benzimidazole chains of PBI own superior affinity to lithium bis(trifluoromethanesulfonyl)imide(LiTFSI),and shares overlapping electron density with Li anode,giving rise to accelerated Li^(+)conduction at room temperature and uniform Li electrodeposition at the electrolyte/Li metal *** SPE is also flame-retardant since heat-resistant polytetrafluoroethylene and a dense,heat-blocking graphitized carbon layer are formed in intense heat throughdehydrogenation/fluorination of PVDF under the catalysis of Lewis base imidazole rings and the decomposition of benzimidazole rings in *** such fire-resistant mechanism is ever reported in conventional electrolytes.

关键词： flame-retardant properties Li metal polybenzimidazole solid polymer electrolyte uniform Li deposition

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