Nature Physics最新文献_第3页

Observation of the transverse Thomson effect 横向汤姆逊效应的观察

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-26 DOI: 10.1038/s41567-025-02936-3

Atsushi Takahagi, Takamasa Hirai, Abdulkareem Alasli, Sang J. Park, Hosei Nagano, Ken-ichi Uchida

引用次数: 0

Tunable interplay between light and heavy electrons in twisted trilayer graphene 扭曲三层石墨烯中轻电子和重电子之间的可调谐相互作用

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-26 DOI: 10.1038/s41567-025-02956-z

Andrew T. Pierce, Yonglong Xie, Jeong Min Park, Zhuozhen Cai, Kenji Watanabe, Takashi Taniguchi, Pablo Jarillo-Herrero, Amir Yacoby

{"title":"Tunable interplay between light and heavy electrons in twisted trilayer graphene","authors":"Andrew T. Pierce, Yonglong Xie, Jeong Min Park, Zhuozhen Cai, Kenji Watanabe, Takashi Taniguchi, Pablo Jarillo-Herrero, Amir Yacoby","doi":"10.1038/s41567-025-02956-z","DOIUrl":"https://doi.org/10.1038/s41567-025-02956-z","url":null,"abstract":"In systems with multiple energy bands, the interplay between electrons with different effective masses drives correlated phenomena that do not occur in single-band systems. Magic-angle twisted trilayer graphene is a tunable platform for exploring such effects, hosting both heavy electrons in its flat bands and delocalized light Dirac electrons in dispersive bands. Superconductivity in this system spans a wider range of phase space than moiré materials without dispersive bands, suggesting that interband interactions influence the stabilization of correlated phases. Here we investigate the interplay between the light and heavy electrons in magic-angle twisted trilayer graphene by performing local compressibility measurements with a scanning single-electron-transistor microscope. We establish that weak incompressibility features near several integer moiré band fillings host a finite population of light Dirac electrons at the Fermi level, despite a gap opening in the flat band sector. At higher magnetic field near charge neutrality, we find a phase transition sequence that is robust over nearly 10 μm but exhibits complex spatial dependence. Calculations establish that the Dirac sector can be viewed as flavour analogous to the spin and valley degrees of freedom.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"34 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144488469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Membraneless protocell confined by a heat flow 受热流限制的无膜原始细胞

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-26 DOI: 10.1038/s41567-025-02935-4

Alexander Floroni, Noël Yeh Martín, Thomas Matreux, Laura I. Weise, Sheref S. Mansy, Hannes Mutschler, Christof B. Mast, Dieter Braun

{"title":"Membraneless protocell confined by a heat flow","authors":"Alexander Floroni, Noël Yeh Martín, Thomas Matreux, Laura I. Weise, Sheref S. Mansy, Hannes Mutschler, Christof B. Mast, Dieter Braun","doi":"10.1038/s41567-025-02935-4","DOIUrl":"https://doi.org/10.1038/s41567-025-02935-4","url":null,"abstract":"In living cells, a complex mixture of biomolecules is assembled within and across membranes. This non-equilibrium state is maintained by sophisticated protein machinery, which imports food molecules, removes waste products and orchestrates cell division. However, it remains unclear how this complex cellular machinery emerged and evolved. Here we show how the molecular contents of a cell can be coupled in a coordinated way to non-equilibrium heat flow. A temperature difference across a water-filled pore assembled the core components of a modern cell, which could then activate the gene expression. The mechanism arose from the interplay of convection and thermophoresis, both driven by the same heat source. The cellular machinery of protein synthesis from DNA via RNA was triggered as a direct result of the concentration of cell components. The same non-equilibrium setting continued to attract food molecules from an adjacent fluid stream, keeping the cellular molecules in a confined pocket protected against diffusion. Our results show how a simple non-equilibrium physical process can assemble the many different molecules of a cell and trigger its basic functions. The framework provides a membrane-free environment to bridge the long evolutionary times from an RNA world to a protein-based cell-like proto-metabolism.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"17 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144488467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantum neural networks can be normal 量子神经网络可以是正常的

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-24 DOI: 10.1038/s41567-025-02941-6

Jayne Thompson

引用次数: 0

Intercellular flow dominates the poroelasticity of multicellular tissues 多细胞组织的孔隙弹性主要由细胞间流动决定

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-20 DOI: 10.1038/s41567-025-02947-0

Fan Liu, Bo Gao, Liran Lei, Shuainan Liu, Hui Li, Ming Guo

{"title":"Intercellular flow dominates the poroelasticity of multicellular tissues","authors":"Fan Liu, Bo Gao, Liran Lei, Shuainan Liu, Hui Li, Ming Guo","doi":"10.1038/s41567-025-02947-0","DOIUrl":"https://doi.org/10.1038/s41567-025-02947-0","url":null,"abstract":"The mechanical characteristics of cells and extracellular matrices—such as elasticity, surface tension and viscosity—can influence diseases such as fibrosis and tumour metastasis. Multicellular tissues have traditionally been modelled as viscoelastic materials, which overlooked the abundance of intercellular space and intercellular flow within the structure. Although intercellular flow can substantially impact development and disease progression, its role in the mechanical behaviour of tissues remains unclear. Here we show that fluid transport via the intercellular space determines the immediate mechanical response of tissues upon deformation. We directly measure the mechanical response of multicellular tissues by applying parallel plate compression via a tailored micro-mechanics platform. We find that both cultured three-dimensional cell spheroids and native mouse pancreatic islets exhibit apparent poroelastic behaviour over a timescale of up to a minute. These findings highlight the fundamental role of interstitial fluid transport in the mechanics of multicellular systems and could help identify potential physical regulators of development and diseases, as well as strategies for engineering multicellular living systems.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"8 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144329003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Floquet states in graphene revealed at last

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-19 DOI: 10.1038/s41567-025-02939-0

Julien Madéo, Keshav M. Dani

引用次数: 0

Neutron scattering and thermodynamic evidence for emergent photons and fractionalization in a pyrochlore spin ice 焦绿石自旋冰中涌现光子和分馏的中子散射和热力学证据

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-19 DOI: 10.1038/s41567-025-02922-9

Bin Gao, Félix Desrochers, David W. Tam, Diana M. Kirschbaum, Paul Steffens, Arno Hiess, Duy Ha Nguyen, Yixi Su, Sang-Wook Cheong, Silke Paschen, Yong Baek Kim, Pengcheng Dai

{"title":"Neutron scattering and thermodynamic evidence for emergent photons and fractionalization in a pyrochlore spin ice","authors":"Bin Gao, Félix Desrochers, David W. Tam, Diana M. Kirschbaum, Paul Steffens, Arno Hiess, Duy Ha Nguyen, Yixi Su, Sang-Wook Cheong, Silke Paschen, Yong Baek Kim, Pengcheng Dai","doi":"10.1038/s41567-025-02922-9","DOIUrl":"https://doi.org/10.1038/s41567-025-02922-9","url":null,"abstract":"The three-dimensional pyrochlore lattice of corner-sharing tetrahedra can host a quantum spin ice, a quantum analogue of the classical spin ice found in other pyrochlore compounds. This state can manifest a quantum spin liquid, and indeed, these compounds are predicted to have emergent gauge fields that produce linearly dispersing collective magnetic excitations near zero energy, in addition to the presence of higher-energy spinon excitations. Here we use polarized neutron scattering experiments on single crystals of the Ce2Zr2O7 pyrochlore. We find evidence for magnetic excitations near zero energy, in addition to signatures of spinons at higher energies. Furthermore, we perform heat capacity measurements and find behaviour consistent with the cubic-in-temperature dependence expected for linearly dispersing gapless bosonic modes. Comparing the observed magnetic excitations with theoretical calculations, we argue that Ce2Zr2O7 is a strong candidate for a dipolar–octupolar quantum spin ice with dominant dipolar Ising interactions.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"38 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144319425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

From actin to action 从行动到行动

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-18 DOI: 10.1038/s41567-025-02937-2

Yu Shi

引用次数: 0

Driven quantum fluids sound like supersolids 驱动的量子流体听起来像超固体

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-18 DOI: 10.1038/s41567-025-02934-5

Claudia Politi

引用次数: 0

Feedback between F-actin organization and active stress governs criticality and energy localization in the cell cytoskeleton f -肌动蛋白组织和主动应激之间的反馈决定了细胞骨架的临界性和能量定位

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-18 DOI: 10.1038/s41567-025-02919-4

Zachary Gao Sun, Nathan Zimmerberg, Patrick Kelly, Carlos Floyd, Garegin Papoian, Michael Murrell

{"title":"Feedback between F-actin organization and active stress governs criticality and energy localization in the cell cytoskeleton","authors":"Zachary Gao Sun, Nathan Zimmerberg, Patrick Kelly, Carlos Floyd, Garegin Papoian, Michael Murrell","doi":"10.1038/s41567-025-02919-4","DOIUrl":"https://doi.org/10.1038/s41567-025-02919-4","url":null,"abstract":"Self-organized criticality can occur in earthquakes, avalanches and biological processes, and is characterized by intermittent, scale-free energy dissipation. In living cells, the actin cytoskeleton undergoes dynamic structural reorganization, particularly during migration and division, where molecular motors generate mechanical stresses that drive large dissipative events. However, the mechanisms governing these critical transitions remain unclear. Here we show that cytoskeletal criticality emerges from the interplay between F-actin organization and active stress generation. Our study focuses on a minimal actomyosin system in vitro, which is composed of F-actin filaments, myosin II motors and nucleation-promoting factors. By systematically varying the actin connectivity and nematic order, we demonstrate that ordered and sparsely connected networks exhibit exponential stress dissipation, whereas disordered and highly connected networks show heavy-tailed distributions of energy release and the 1/f noise characteristic of self-organized criticality. Increased disorder leads to stress localization, shifting force propagation into stiffer mechanical modes, reminiscent of Anderson localization in condensed-matter systems. Furthermore, we show that network architecture directly regulates the myosin II filament size, establishing a chemical–mechanical feedback loop that modulates criticality. Our findings provide insights into the collective cytoskeletal dynamics, energy localization and cellular self-organization.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"590 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144312211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0