Nature Physics最新文献_第2页

Twisted path to Landau levels

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-03-20 DOI: 10.1038/s41567-025-02837-5

Kenji Yasuda

引用次数: 0

Interplay between topology and correlations in the second moiré band of twisted bilayer MoTe2

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-03-20 DOI: 10.1038/s41567-025-02803-1

Fan Xu, Xumin Chang, Jiayong Xiao, Yixin Zhang, Feng Liu, Zheng Sun, Ning Mao, Nikolai Peshcherenko, Jiayi Li, Kenji Watanabe, Takashi Taniguchi, Bingbing Tong, Li Lu, Jinfeng Jia, Dong Qian, Zhiwen Shi, Yang Zhang, Xiaoxue Liu, Shengwei Jiang, Tingxin Li

{"title":"Interplay between topology and correlations in the second moiré band of twisted bilayer MoTe2","authors":"Fan Xu, Xumin Chang, Jiayong Xiao, Yixin Zhang, Feng Liu, Zheng Sun, Ning Mao, Nikolai Peshcherenko, Jiayi Li, Kenji Watanabe, Takashi Taniguchi, Bingbing Tong, Li Lu, Jinfeng Jia, Dong Qian, Zhiwen Shi, Yang Zhang, Xiaoxue Liu, Shengwei Jiang, Tingxin Li","doi":"10.1038/s41567-025-02803-1","DOIUrl":"https://doi.org/10.1038/s41567-025-02803-1","url":null,"abstract":"Topological flat bands formed in two-dimensional lattice systems offer an opportunity to study fractional phases of matter in the absence of an external magnetic field. Examples include fractional quantum anomalous Hall effects and fractional topological insulators. Recently, fractional quantum anomalous Hall effects have been experimentally realized in both twisted bilayer MoTe2 and rhombohedral-stacked multilayer graphene on hexagonal boron nitride. These studies focus mainly on the first moiré flat band, but there is a possibility that non-Abelian states could occur in the second moiré band. Here we present a systematic transport study of twisted bilayer MoTe2 devices, focusing on the second moiré band. We observe ferromagnetism in the second moiré band, and a Chern insulator state driven by out-of-plane magnetic fields at a filling factor of three holes per moiré unit cell. Between fillings of 2.2 and 2.7 holes per moiré unit cell, we observe a finite temperature resistivity minimum with a 1/T scaling law at low temperatures and a large out-of-plane negative magnetoresistance. Applying an out-of-plane electric field can induce quantum phase transitions at both integer and fractional filling factors. Our studies lay the groundwork for realizing tunable topological states and other unexpected magnetic phases beyond the first moiré flat band based in twisted MoTe2.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"55 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660606","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

A metallic room-temperature d-wave altermagnet

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-03-18 DOI: 10.1038/s41567-025-02822-y

Bei Jiang, Mingzhe Hu, Jianli Bai, Ziyin Song, Chao Mu, Gexing Qu, Wan Li, Wenliang Zhu, Hanqi Pi, Zhongxu Wei, Yu-Jie Sun, Yaobo Huang, Xiquan Zheng, Yingying Peng, Lunhua He, Shiliang Li, Jianlin Luo, Zheng Li, Genfu Chen, Hang Li, Hongming Weng, Tian Qian

{"title":"A metallic room-temperature d-wave altermagnet","authors":"Bei Jiang, Mingzhe Hu, Jianli Bai, Ziyin Song, Chao Mu, Gexing Qu, Wan Li, Wenliang Zhu, Hanqi Pi, Zhongxu Wei, Yu-Jie Sun, Yaobo Huang, Xiquan Zheng, Yingying Peng, Lunhua He, Shiliang Li, Jianlin Luo, Zheng Li, Genfu Chen, Hang Li, Hongming Weng, Tian Qian","doi":"10.1038/s41567-025-02822-y","DOIUrl":"https://doi.org/10.1038/s41567-025-02822-y","url":null,"abstract":"Altermagnetism is a recently discovered unconventional magnetic phase that is characterized by time-reversal symmetry breaking and spin-split band structures in materials with zero net magnetization. Recently, spin-polarized band structures and a vanishing net magnetization were observed in semiconductors MnTe and MnTe2, confirming this unconventional magnetic order. Metallic altermagnets offer advantages for exploring physical phenomena related to low-energy quasiparticle excitations and for applications in spintronics because the finite electrical conductivity of metals allows direct manipulation of the spin current through the electric field. We demonstrate that KV2Se2O is a metallic room-temperature altermagnet with d-wave spin-momentum locking. Our experiments probe the magnetic and electronic structures of this compound and reveal a highly anisotropic spin-polarized Fermi surface and the emergence of a spin-density-wave order in the altermagnetic phase. These characteristics suggest that KV2Se2O could be a helpful platform for high-performance spintronic devices and for studying many-body effects coupled with unconventional magnetism.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"16 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640382","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

Jet hammers and boring ultrasound

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-03-18 DOI: 10.1038/s41567-025-02833-9

Michael C. Kolios

引用次数: 0

Detection of fractional quantum Hall states by entropy-sensitive measurements

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-03-17 DOI: 10.1038/s41567-025-02813-z

Nishat Sultana, Robert W. Rienstra, Kenji Watanabe, Takashi Taniguchi, Joseph A. Stroscio, Nikolai B. Zhitenev, D. E. Feldman, Fereshte Ghahari

引用次数: 0

The lasting legacy of Poincaré

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2025-03-14 DOI: 10.1038/s41567-025-02818-8

Mark Buchanan

引用次数: 0

Evidence of universal conformal invariance in living biological matter

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-03-14 DOI: 10.1038/s41567-025-02791-2

Benjamin H. Andersen, Francisco M. R. Safara, Valeriia Grudtsyna, Oliver J. Meacock, Simon G. Andersen, William M. Durham, Nuno A. M. Araujo, Amin Doostmohammadi

{"title":"Evidence of universal conformal invariance in living biological matter","authors":"Benjamin H. Andersen, Francisco M. R. Safara, Valeriia Grudtsyna, Oliver J. Meacock, Simon G. Andersen, William M. Durham, Nuno A. M. Araujo, Amin Doostmohammadi","doi":"10.1038/s41567-025-02791-2","DOIUrl":"https://doi.org/10.1038/s41567-025-02791-2","url":null,"abstract":"The emergent dynamics of collective cellular movement are typically thought to depend on how cells interact with one another and the mechanisms used to drive motility, both of which exhibit remarkable diversity across different biological systems. Here we report experimental evidence of a universal feature in the patterns of flow that spontaneously emerge in groups of collectively moving cells. Specifically, we demonstrate that the flows generated by collectively moving dog kidney cells, human breast cancer cells and two different strains of pathogenic bacteria exhibit robust conformal invariance. We also show that the precise form of invariance in all four systems is described by the Schramm–Loewner evolution—a family of planar curves defined by a single parameter—and belongs to the percolation universality class. The presence of universal conformal invariance reveals that the macroscopic features of living biological matter exhibit universal translational, rotational and scale symmetries that are independent of the microscopic properties of its constituents. Our results show that flow patterns generated by different systems are highly conserved and that biological systems can be used to experimentally test predictions from the theories for conformally invariant structures.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"8 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618709","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 computers quickly find local minima

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-03-14 DOI: 10.1038/s41567-025-02832-w

Tongyang Li

引用次数: 0

Single-fluorogen imaging reveals distinct environmental and structural features of biomolecular condensates

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-03-14 DOI: 10.1038/s41567-025-02827-7

Tingting Wu, Matthew R. King, Yuanxin Qiu, Mina Farag, Rohit V. Pappu, Matthew D. Lew

{"title":"Single-fluorogen imaging reveals distinct environmental and structural features of biomolecular condensates","authors":"Tingting Wu, Matthew R. King, Yuanxin Qiu, Mina Farag, Rohit V. Pappu, Matthew D. Lew","doi":"10.1038/s41567-025-02827-7","DOIUrl":"https://doi.org/10.1038/s41567-025-02827-7","url":null,"abstract":"Biomolecular condensates are viscoelastic materials. Simulations predict that condensates formed by intrinsically disordered proteins are network fluids defined by spatially inhomogeneous organization of the underlying molecules. Here, we test these predictions and find that molecules within condensates are organized into slow-moving nanoscale clusters and fast-moving dispersed molecules. These results, obtained using single-fluorogen tracking and super-resolution imaging of different disordered protein-based condensates, affirm the predicted spatially inhomogeneous organization of molecules within condensates. We map the internal environments and interfaces of condensates using fluorogens that localize differently to the interiors versus interface between dilute phase and condensate. We show that nanoscale clusters within condensates are more hydrophobic than regions outside the clusters, and regions within condensates that lie outside clusters are more hydrophobic than coexisting dilute phases. Our findings provide a structural and dynamical basis for the viscoelasticity of condensates.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"68 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618488","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

Never judge a book by its cover

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2025-03-14 DOI: 10.1038/s41567-025-02794-z

Richard J. C. Brown

引用次数: 0