Chinese Physics Letters最新文献

Gate Tunable Labyrinth Domain Structures in a van der Waals Itinerant Ferromagnet Cr7Te8 范德华巡回铁磁体 Cr7Te8 中的栅极可调谐迷宫域结构

Chinese Physics Letters Pub Date : 2024-08-08 DOI: 10.1088/0256-307x/41/9/097501

Kui Meng, Zeya Li, Yicheng Shen, Xiangyu Bi, Junhao Rao, Yuting Qian, Zhansheng Gao, Peng Chen, Caiyu Qiu, Feng Qin, Jinxiong Wu, Feng Luo, Junwei Huang, Hongtao Yuan

{"title":"Gate Tunable Labyrinth Domain Structures in a van der Waals Itinerant Ferromagnet Cr7Te8","authors":"Kui Meng, Zeya Li, Yicheng Shen, Xiangyu Bi, Junhao Rao, Yuting Qian, Zhansheng Gao, Peng Chen, Caiyu Qiu, Feng Qin, Jinxiong Wu, Feng Luo, Junwei Huang, Hongtao Yuan","doi":"10.1088/0256-307x/41/9/097501","DOIUrl":"https://doi.org/10.1088/0256-307x/41/9/097501","url":null,"abstract":"\u0000 Manipulating magnetic domain structure plays a key role in advanced spintronics devices. Theoretical rationale is that the labyrinthine domain structure, normally appearing in ferromagnetic thin films with strong magnetic anisotropy, shows a great potential to increase data storage density for designing magnetic nonvolatile memory and logic devices. However, an electrical control of labyrinthine domain structure remains elusive. Here, we demonstrate the gate-driven evolution of labyrinthine domain structures in an itinerant ferromagnet Cr7Te8. By combining electric transport measurements and micromagnetic finite difference simulations, we found that the hysteresis loop of anomalous Hall effect in Cr7Te8 samples shows distinct features corresponding to the generation of labyrinthine domain structures. The labyrinthine domain structures are found to be electrically tunable via Li-electrolyte gating, and such gate-driven evolution in Cr7Te8 originates from the reduction of the magnetic anisotropic energy with gating, revealed by our micromagnetic simulations. Our results on the gate control of anomalous Hall effect in an itinerant magnetic material provide an opportunity to understand the formation and evolution of labyrinthine domain structures, paving a new route towards electric-field driven spintronics.","PeriodicalId":505209,"journal":{"name":"Chinese Physics Letters","volume":"31 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141927189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solitons and Their Biperiodic Pulsation in Ultrafast Fiber Lasers Based on CB/GO 基于 CB/GO 的超快光纤激光器中的孤子及其双周期脉动

Chinese Physics Letters Pub Date : 2024-07-16 DOI: 10.1088/0256-307x/41/8/084203

Zhen-Tao Ju, Zhi-Zeng Si, Xin Yan, Chao-Qing Dai

引用次数: 0

Bound and resonating multiquark configurations 束缚和共振多夸克构型

Chinese Physics Letters Pub Date : 2024-07-16 DOI: 10.1088/0256-307x/41/8/081401

Jean-Marc Richard

引用次数: 0

Electronic Correlation and Pseudogap-like Behavior of High-Temperature Superconductor La3Ni2O7 高温超导体 La3Ni2O7 的电子相关性和类伪缺口行为

Chinese Physics Letters Pub Date : 2024-07-10 DOI: 10.1088/0256-307x/41/8/087402

Yidian Li, Xian Du, Yantao Cao, C. Pei, Mingxin Zhang, Wenxuan Zhao, Kaiyi Zhai, R. Xu, Zhongkai Liu, Zhiwei Li, Jinkui Zhao, Gang Li, Y. Qi, Hanjie Guo, Yulin Chen, Lexian Yang

{"title":"Electronic Correlation and Pseudogap-like Behavior of High-Temperature Superconductor La3Ni2O7","authors":"Yidian Li, Xian Du, Yantao Cao, C. Pei, Mingxin Zhang, Wenxuan Zhao, Kaiyi Zhai, R. Xu, Zhongkai Liu, Zhiwei Li, Jinkui Zhao, Gang Li, Y. Qi, Hanjie Guo, Yulin Chen, Lexian Yang","doi":"10.1088/0256-307x/41/8/087402","DOIUrl":"https://doi.org/10.1088/0256-307x/41/8/087402","url":null,"abstract":"\u0000 High-temperature superconductivity (HTSC) remains one of the most challenging and fascinating mysteries in condensed matter physics. Recently, superconductivity with transition temperature exceeding liquid-nitrogen temperature is discovered in La3Ni2O7 at high pressure, which provides a new platform to explore the unconventional HTSC. In this work, using high-resolution angle-resolved photoemission spectroscopy and ab-initio calculation, we systematically investigate the electronic structures of La3Ni2O7 at ambient pressure. Our experiments are in nice agreement with ab-initio calculations after considering an orbital-dependent band renormalization effect. The strong electron correlation effect pushes a flat band of d\u0000 \u0000 z\u0000 2\u0000 orbital component below the Fermi level (E\u0000 F), which is predicted to locate right at E\u0000 F under high pressure. Moreover, the d\u0000 \u0000 x\u0000 2-y\u0000 2\u0000 band shows a pseudogap-like behavior with suppressed spectral weight and diminished quasiparticle peak near E\u0000 F. Our findings provide important insights into the electronic structure of La3Ni2O7, which will shed light on the understanding of the unconventional superconductivity in nickelates.","PeriodicalId":505209,"journal":{"name":"Chinese Physics Letters","volume":"47 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141660096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural and ferroelectric transition in few-layer HfO2 films from first principles 从第一原理看少层 HfO2 薄膜的结构和铁电转换

Chinese Physics Letters Pub Date : 2024-07-09 DOI: 10.1088/0256-307x/41/8/087701

Ruiling Gao, Chao Liu, Bowen Shi, Yongchang Li, Bing Luo, Rui Chen, Wen-Ze Ouyang, Heng Gao, Shunbo Hu, Yin Wang, Dongdong Li, Wei Ren

{"title":"Structural and ferroelectric transition in few-layer HfO2 films from first principles","authors":"Ruiling Gao, Chao Liu, Bowen Shi, Yongchang Li, Bing Luo, Rui Chen, Wen-Ze Ouyang, Heng Gao, Shunbo Hu, Yin Wang, Dongdong Li, Wei Ren","doi":"10.1088/0256-307x/41/8/087701","DOIUrl":"https://doi.org/10.1088/0256-307x/41/8/087701","url":null,"abstract":"\u0000 The discovery of ferroelectricity in HfO2-based materials with high dielectric constant has inspired tremendous research interest for next-generation electronic devices. Importantly, films structure and strain are key factors in the exploration of ferroelectricity in the fluorite-type oxide HfO2 films. Here we have investigated the structures and strain-induced ferroelectric transition in the different phases of few-layer HfO2 films (layer number N=1-5). It is found that HfO2 films for all phases are more stable with increasing films thickness. Among them, the Pmn2\u0000 \u0000 1\u0000 (110)-oriented film is the most stable, and the films of N=4, 5 occur a P2\u0000 \u0000 1\u0000 ferroelectric transition under tensile strain, resulting in polarization about 11.8 μC/cm2 along in-plane a-axis. The ferroelectric transition is caused by the strain, which induces the displacement of Hf and O atoms on the surface to non-centrosymmetric positions away from the original paraelectric positions, accompanied by the change of surface Hf-O bond lengths. More importantly, three new stable HfO2 2D structures are discovered, together with computed electronic structures, mechanical, and dielectric properties analyses. This work provides guidance for theoretical and experimental study of the new structures and strain-tuned ferroelectricity in freestanding HfO2 films.","PeriodicalId":505209,"journal":{"name":"Chinese Physics Letters","volume":"45 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141664819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonlinear-optical analogies in nuclear-like soliton reactions: selection rules, nonlinear tunneling and sub-barrier fusion-fission 类核孤子反应中的非线性-光学类比：选择规则、非线性隧道和亚势垒聚变-裂变

Chinese Physics Letters Pub Date : 2024-07-09 DOI: 10.1088/0256-307x/41/8/080501

T. Belyaeva, V. Serkin

{"title":"Nonlinear-optical analogies in nuclear-like soliton reactions: selection rules, nonlinear tunneling and sub-barrier fusion-fission","authors":"T. Belyaeva, V. Serkin","doi":"10.1088/0256-307x/41/8/080501","DOIUrl":"https://doi.org/10.1088/0256-307x/41/8/080501","url":null,"abstract":"\u0000 The main goal of our article is to reveal unexpected but intriguing analogies arising between optical solitons and nuclear physics, which still remain hidden from us. We consider the main cornerstones of the concept of nonlinear optics of nuclear reactions and the well-dressed repulsive-core solitons. On the base of this model, we reveal the most intriguing properties of the nonlinear tunneling of nucleus-like solitons and the soliton selfinduced sub-barrier transparency effect. We describe novel interesting and stimulating analogies between the interaction of nucleus-like solitons on the repulsive barrier and nuclear sub-barrier reactions. The main finding of our study concerns the conservation of total number of nucleons (or the baryon number) in nuclear-like soliton reactions. We show that inelastic interactions among well-dressed repulsive-core solitons arise only when a “cloud” of “dressing” spectral side-bands appears in the frequency spectra of the solitons. This property of nucleus-like solitons is directly related to the nuclear density distribution described by the dimensionless small shape-squareness parameter. Thus the Fourier spectra of nucleus-like solitons are similar to the nuclear form factors. We show that the nuclear-like reactions between well-dressed solitons are realized by “exchange” between “particle-like” side-bands in their spectra.","PeriodicalId":505209,"journal":{"name":"Chinese Physics Letters","volume":"119 46","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141665297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation of rotating asymmetric sideways forces during Vertical Displacement Events in CFETR 模拟 CFETR 垂直位移事件中的旋转不对称侧向力

Chinese Physics Letters Pub Date : 2024-07-05 DOI: 10.1088/0256-307x/41/8/085201

Changzhi Jiang, Shunwen Wang, Zhenyu Zhou, Di Hu, Bo Li, Jorek team

{"title":"Simulation of rotating asymmetric sideways forces during Vertical Displacement Events in CFETR","authors":"Changzhi Jiang, Shunwen Wang, Zhenyu Zhou, Di Hu, Bo Li, Jorek team","doi":"10.1088/0256-307x/41/8/085201","DOIUrl":"https://doi.org/10.1088/0256-307x/41/8/085201","url":null,"abstract":"\u0000 Tokamak plasmas with elongated cross-sections are susceptible to Vertical Displacement Events (VDEs), which can damage the first wall via heat flux or electromagnetic (EM) forces. We present a 3D nonlinear reduced MHD simulation of CFETR plasma during a cold VDE following the thermal quench, focusing on the relationship between the EM force, plasma displacement, and the n = 1 mode. The dominant mode, identified as m/n = 2/1, becomes destabilized when most of the current is contracted within the q = 2 surface. The displacement of the plasma current centroid is less than that of the magnetic axis due to the presence of SOL current in the open field line region. Hence, the symmetric component of the induced vacuum vessel current is significantly mitigated. The direction of the sideways force keeps a constant phase approximately compared with the asymmetric component of the vacuum vessel current and the SOL current, which in turn keep in-phase with the dominant 2/1 mode, respectively. Their amplitudes are also closely associated with the growth of the dominant mode. These findings provide insights into potential methods for controlling the phase and amplitude of sideways forces during VDEs in the future.","PeriodicalId":505209,"journal":{"name":"Chinese Physics Letters","volume":" 40","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141675925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exciton Bose-Einstein condensation in transition metal dichalcogenide monolayer under in-plane magnetic fields 面内磁场下过渡金属二掺杂单层中的激子玻色-爱因斯坦凝聚

Chinese Physics Letters Pub Date : 2024-07-04 DOI: 10.1088/0256-307x/41/8/087101

Dengfeng Wang, Yingda Chen, ZhiChuan Niu, W. Lou, Kai Chang

引用次数: 0

Rydberg-atom terahertz heterodyne receiver with ultrahigh spectral resolution 具有超高光谱分辨率的雷德贝格-原子太赫兹外差接收器

Chinese Physics Letters Pub Date : 2024-07-04 DOI: 10.1088/0256-307x/41/8/084201

Zhen-Yue She, Xiaojie Zhu, Ya-Yi Lin, Xianzhe Li, Xiaolin Yang, Yanfei Shang, Yuqin Teng, Haitao Tu, Kaiyu Liao, Caixia Zhang, Xiaohong Liu, Jiehua Chen, Wei Huang

引用次数: 0

Pressure-tuned intrinsic anomalous Hall conductivity in kagome magnets RV6Sn6 (R = Gd, Tb) 卡戈梅磁体 RV6Sn6（R = Gd、Tb）中的压力调谐本征反常霍尔电导率

Chinese Physics Letters Pub Date : 2024-03-27 DOI: 10.1088/0256-307x/41/4/047503

Xiangming Kong, Zicheng Tao, Rui Zhang, Wei Xia, Xu Chen, Cuiying Pei, Tianping Ying, Yanpeng Qi, Yanfeng Guo, Xiaofan Yang, Shiyan Li

{"title":"Pressure-tuned intrinsic anomalous Hall conductivity in kagome magnets RV6Sn6 (R = Gd, Tb)","authors":"Xiangming Kong, Zicheng Tao, Rui Zhang, Wei Xia, Xu Chen, Cuiying Pei, Tianping Ying, Yanpeng Qi, Yanfeng Guo, Xiaofan Yang, Shiyan Li","doi":"10.1088/0256-307x/41/4/047503","DOIUrl":"https://doi.org/10.1088/0256-307x/41/4/047503","url":null,"abstract":"\u0000 Exploration of exotic phenomena in magnetic topological systems is at the frontier of condensed matter physics, holding a significant promise for the applications in topological spintronics. However, complex magnetic structures carrying nontrivial topological properties hinder its progresses. Here, we investigate the pressure effect on the novel topological kagome magnets GdV6Sn6 and TbV6Sn6 to dig out the interplay between magnetic Gd/Tb layers and nonmagnetic V-based kagome sublattice. The pressure-tuned magnetic transition temperature T\u0000 m in both compounds exhibit a turning point at the critical pressure P\u0000 c, accompanying with a sign reversal in anomalous Hall effect (AHE). The separation of intrinsic and extrinsic contributions using the TYJ scaling model suggests that the intrinsic mechanism originating from the electronic Berry curvature holds the priority in the competition with extrinsic mechanism in AHE. Above findings can be attributed to the combined effect of pressure-tuned band topology and magnetic interaction in segregated layers. Our results provide a practical route to design and manipulate the intrinsic AHE in magnetic topological materials.","PeriodicalId":505209,"journal":{"name":"Chinese Physics Letters","volume":"100 44","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140377610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0