arXiv - PHYS - Other Condensed Matter最新文献_第3页

Nanowrinkle Waveguide in Graphene for Enabling Secure Dirac Fermion Transport 实现安全狄拉克费米子传输的石墨烯纳米皱波导

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-07-29 DOI: arxiv-2407.20148

Seunghyun Jun, Myung-Chul Jung, Nojoon Myoung

引用次数: 0

Successive ferroelectric orders and magnetoelectric coupling without long-range magnetic order in highly frustrated pyrochlore compounds: Sm$_2$Ti$_{2-x}$V$_x$O$_7$ 高沮度火成化合物中无长程磁序的连续铁电阶和磁电耦合：Sm$_2$Ti$_{2-x}$V$_x$O$_7$

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-07-29 DOI: arxiv-2407.19883

S. Mukherjee, O. Ivashko, S. Majumdar, A. Kumar, S. Giri

{"title":"Successive ferroelectric orders and magnetoelectric coupling without long-range magnetic order in highly frustrated pyrochlore compounds: Sm$_2$Ti$_{2-x}$V$_x$O$_7$","authors":"S. Mukherjee, O. Ivashko, S. Majumdar, A. Kumar, S. Giri","doi":"arxiv-2407.19883","DOIUrl":"https://doi.org/arxiv-2407.19883","url":null,"abstract":"Sm$_2$Ti$_2$O$_7$, a member of rare-earth titanate pyrochlores, exhibits\u0000dipolar-octupolar antiferromagnetism below $T_N$ = 0.35 K. We observed two\u0000ferroelectric transitions at 182 ($T_{FE1}$) and 52 K ($T_{FE2}$),\u0000significantly higher than $T_N$ for Sm$_2$Ti$_{2-x}$V$_x$O$_7$ ($x$ = 0, 0.1).\u0000Although the ferroelectric transition temperatures remain unchanged, the\u0000polarization value decreases considerably with V doping. A structural\u0000transition to a polar $R3m$ rhombohedral phase from the cubic $Fdbar{3}m$\u0000structure occurs at $T_{FE1}$, involving a distortion in the pyochlore lattice.\u0000Remarkably, significant linear magnetoelectric coupling is observed in both\u0000compounds, with further enhancement of magnetoelectric coupling due to magnetic\u0000V doping. The existence of magnetoelectric coupling without long-range magnetic\u0000order in a frustrated pyrochlore system could enable the tailoring of\u0000magnetoelectric coupling properties, which can be further fine-tuned through V\u0000doping. The emergence of ferroelectricity in a frustrated magnetic system\u0000introduces an intriguing aspect to these compounds and paves the way for\u0000developing ferroelectric order driven by the alleviation of magnetic\u0000frustration in pyrochlore systems.","PeriodicalId":501211,"journal":{"name":"arXiv - PHYS - Other Condensed Matter","volume":"74 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141872804","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

Enhanced Piezoelectricity in Sustainable-by-design Chitosan Nanocomposite Elastomers for Prosthetics, Robotics, and Circular Electronics 通过可持续设计增强壳聚糖纳米复合弹性体的压电性，用于假肢、机器人和循环电子设备

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-07-26 DOI: arxiv-2407.18585

Jacopo Nicoletti, Leonardo Puppulin, Julie Routurier, Saimir Frroku, Nouha Loudhaief, Claudia Crestini, Alvise Perosa, Maurizio Selva, Matteo Gigli, Domenico De Fazio, Giovanni Antonio Salvatore

{"title":"Enhanced Piezoelectricity in Sustainable-by-design Chitosan Nanocomposite Elastomers for Prosthetics, Robotics, and Circular Electronics","authors":"Jacopo Nicoletti, Leonardo Puppulin, Julie Routurier, Saimir Frroku, Nouha Loudhaief, Claudia Crestini, Alvise Perosa, Maurizio Selva, Matteo Gigli, Domenico De Fazio, Giovanni Antonio Salvatore","doi":"arxiv-2407.18585","DOIUrl":"https://doi.org/arxiv-2407.18585","url":null,"abstract":"Piezoelectricity, the generation of electric charge in response to mechanical\u0000stress, is a key property in both natural and synthetic materials. This study\u0000significantly boosts the piezoelectric response of chitosan, a biodegradable\u0000biopolymer, by integrating chitin/chitosan nanocrystals into natural\u0000chitosan-based thin film elastomers. The resulting materials achieve d$_{33}$\u0000values of 15-19 pmV$^{-1}$, a marked improvement over the 5-9 pmV$^{-1}$\u0000observed in pure chitosan films thanks to increased crystallinity from the\u0000nanocrystals. We utilize piezoresponse force microscopy (PFM) to accurately\u0000measure the d$_{33}$ coefficient, employing an engineered extraction method\u0000that eliminates the electrostatic contribution, which can overestimate the\u0000piezoelectric response. The resulting chitosan elastomers exhibit elastic\u0000deformation up to 40% strain and a Young's modulus of approximately 100 MPa,\u0000similar to soft tissues. These properties, along with the fact that the\u0000employed materials can be entirely crafted from upcycled biowaste, make these\u0000elastomers ideal for prosthetics, wearable devices, energy harvesters, and\u0000sustainable transducers. Our findings underscore the potential of\u0000chitosan-based piezoelectric materials for advanced applications in\u0000biotechnology, soft robotics, and the green Internet of Things.","PeriodicalId":501211,"journal":{"name":"arXiv - PHYS - Other Condensed Matter","volume":"363 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141873430","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

Predicting quantum materials properties using novel faithful machine learning embeddings 利用新型忠实机器学习嵌入预测量子材料特性

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-07-25 DOI: arxiv-2407.18388

Gavin Nop, Micah Mundy, Durga Paudyal, Jonathan Smith

引用次数: 0

Partitioning of total charge in matter from geometric phases of electrons 从电子几何相划分物质总电荷

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-07-24 DOI: arxiv-2407.17202

Joyeta Saha, Sujith Nedungattil Subrahmanian, Joydeep Bhattacharjee

{"title":"Partitioning of total charge in matter from geometric phases of electrons","authors":"Joyeta Saha, Sujith Nedungattil Subrahmanian, Joydeep Bhattacharjee","doi":"arxiv-2407.17202","DOIUrl":"https://doi.org/arxiv-2407.17202","url":null,"abstract":"Based on geometric phases of Bloch electrons computed from first-principles,\u0000we propose a scheme for unambiguous partitioning of charge in matter, derivable\u0000directly from the Kohn-Sham states. Generalizing the fact that geometric phases\u0000acquired by electrons due to evolution of their crystal momentum $vec k$ in a\u0000direction through out the Brillouin zone(BZ), provide position of their\u0000localization with net minimum spread along the corresponding direction in real\u0000space. We find that the total charge can be meaningfully distributed into\u0000charge centres simultaneously contributed by triads of electrons with their\u0000crystal momentum evolving linearly independently through each unique $vec k$\u0000across the BZ. The resultant map of charge centres readily renders not only the\u0000qualitative nature of inter-atomic as well as intra-atomic hybridization of\u0000electrons, but also unbiased quantitative estimates of electrons on atoms or\u0000shared between them, as demonstrated in a select variety of isolated and\u0000periodic systems with varying degree of sharing of valence electrons among\u0000atoms, including variants of multi-centered bonds.","PeriodicalId":501211,"journal":{"name":"arXiv - PHYS - Other Condensed Matter","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141784199","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

Magnetotransport in a graphite cylinder under quantizing fields 量子化磁场下石墨圆柱体中的磁传输

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-07-19 DOI: arxiv-2407.14263

N. Kunchur, S. Galeski, F. Menges, R. Wawrzyńczak, C. Felser, T. Meng, J. Gooth

引用次数: 0

Observation of surface Fermi arcs in altermagnetic Weyl semimetal CrSb 观测改磁韦尔半金属 CrSb 的表面费米弧

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-07-18 DOI: arxiv-2407.13497

Wenlong Lu, Shiyu Feng, Yuzhi Wang, Dong Chen, Zihan Lin, Xin Liang, Siyuan Liu, Wanxiang Feng, Kohei Yamagami, Junwei Liu, Claudia Felser, Quansheng Wu, Junzhang Ma

{"title":"Observation of surface Fermi arcs in altermagnetic Weyl semimetal CrSb","authors":"Wenlong Lu, Shiyu Feng, Yuzhi Wang, Dong Chen, Zihan Lin, Xin Liang, Siyuan Liu, Wanxiang Feng, Kohei Yamagami, Junwei Liu, Claudia Felser, Quansheng Wu, Junzhang Ma","doi":"arxiv-2407.13497","DOIUrl":"https://doi.org/arxiv-2407.13497","url":null,"abstract":"As a special type of collinear antiferromagnetism (AFM), altermagnetism has\u0000garnered significant research interest recently. Altermagnets exhibit broken\u0000parity-time symmetry and zero net magnetization in real space, leading to\u0000substantial band splitting in momentum space even in the absence of spin-orbit\u0000coupling. Meanwhile, parity-time symmetry breaking always induce nontrivial\u0000band topology such as Weyl nodes. While Weyl semimetal states and nodal lines\u0000have been theoretically proposed in altermagnets, rare reports of experimental\u0000observation have been made up to this point. Using ARPES and first-principles\u0000calculations, we systematically studied the electronic structure of the\u0000room-temperature altermagnet candidate CrSb. At generic locations in momentum\u0000space, we clearly observed band spin splitting. Furthermore, we identified\u0000discrete surface Fermi arcs on the (100) cleaved side surface close to the\u0000Fermi level originating from bulk band topology. Our results imply that CrSb\u0000contains interesting nontrivial topological Weyl physics, in addition to being\u0000an excellent room temperature altermagnet.","PeriodicalId":501211,"journal":{"name":"arXiv - PHYS - Other Condensed Matter","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141744640","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

Influence of different mutual friction models on two-way coupled quantized vortices and normal fluid in superfluid $^4$He 不同相互摩擦模型对超流体 $^4$He 中双向耦合量子化涡流和法向流体的影响

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-07-17 DOI: arxiv-2407.12392

Hiromichi Kobayashi, Satoshi Yui, Makoto Tsubota

{"title":"Influence of different mutual friction models on two-way coupled quantized vortices and normal fluid in superfluid $^4$He","authors":"Hiromichi Kobayashi, Satoshi Yui, Makoto Tsubota","doi":"arxiv-2407.12392","DOIUrl":"https://doi.org/arxiv-2407.12392","url":null,"abstract":"We study the influence of two mutual friction models on quantized vortices\u0000and normal fluid using two-way coupled simulations of superfluid $^4$He. The\u0000normal fluid is affected by quantized vortices via mutual friction. A previous\u0000study [Y. Tang, et al. Nat. Commun. 14, 2941 (2023)] compared the time\u0000evolutions of the vortex ring radius and determined that the self-consistent\u0000two-way coupled mutual friction (S2W) model yielded better agreement with the\u0000experimental results than the two-way coupled mutual friction (2W) model whose\u0000model parameters were determined through experiments with rotating superfluid\u0000helium. In this study, we compare the two models in more detail in terms of the\u0000quantized vortex ring propagation, reconnection, and thermal counterflow. We\u0000found that the S2W model exhibits better results than the 2W model on the\u0000microscopic scale near a quantized vortex, such as during quantized vortex ring\u0000propagation and reconnection, although the S2W model requires a higher spatial\u0000resolution. For complex flows such as a thermal counterflow, the 2W model can\u0000be applied even to a low-resolution flow while maintaining the anisotropic\u0000normal fluid velocity fluctuations. In contrast, the 2W model predicts lower\u0000normal fluid velocity fluctuations than the S2W model. The two models show\u0000probability density functions with $- 3$ power-law tails for the normal fluid\u0000velocity fluctuations.","PeriodicalId":501211,"journal":{"name":"arXiv - PHYS - Other Condensed Matter","volume":"163 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141744696","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

3He adsorbed on molecular hydrogen surfaces 分子氢表面吸附的 3He

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-07-17 DOI: arxiv-2407.12436

M. C. Gordillo, J. Boronat

引用次数: 0

Quantum Advancements in Neutron Scattering Reshape Spintronic Devices 中子散射的量子进步重塑自旋电子器件

arXiv - PHYS - Other Condensed Matter Pub Date : 2024-07-15 DOI: arxiv-2407.10822

M. E. Henderson, D. G. Cory, D. Sarenac, D. A. Pushin

{"title":"Quantum Advancements in Neutron Scattering Reshape Spintronic Devices","authors":"M. E. Henderson, D. G. Cory, D. Sarenac, D. A. Pushin","doi":"arxiv-2407.10822","DOIUrl":"https://doi.org/arxiv-2407.10822","url":null,"abstract":"Topological magnetism has sparked an unprecedented age in quantum\u0000technologies. Marked by twisted spin structures with exotic dynamical modes,\u0000topological magnets have motivated a new generation of spintronic devices which\u0000transcend the limits of conventional semiconductor-based electronics. While\u0000existing material probes have biased studies and device conceptualizations for\u0000thin samples in two dimensions, advancements in three-dimensional probing\u0000techniques using beams of neutrons, are transforming our understanding of\u0000topological and emergent physics to reimagine spintronic devices. Here, we\u0000review recent neutron scattering breakthroughs which harness quantum degrees of\u0000freedom to enable three-dimensional topological investigations of quantum\u0000materials. We discuss applications of structured and tomographic neutron\u0000scattering techniques to topological magnets, with particular emphasis on\u0000magnetic skyrmion systems and their inspired three-dimensional logic device\u0000infrastructures through novel multi-bit encoding and control schemes.\u0000SANS-based dynamic visualizations and coherent manipulations of\u0000three-dimensional topological qubits are proposed using electric field controls\u0000of depth-dependant helicities and spin-orbit tuning of the neutron beam.\u0000Together, these investigations uncover a new world of three-dimensional\u0000topological physics which enhances spintronic devices through a novel set of\u0000structures, dynamics, and controls, unique to three-dimensional systems.","PeriodicalId":501211,"journal":{"name":"arXiv - PHYS - Other Condensed Matter","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141722043","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