Nature PhysicsPub Date : 2025-07-14DOI: 10.1038/s41567-025-02955-0
Juris Meija
{"title":"Elusive isotope ratios","authors":"Juris Meija","doi":"10.1038/s41567-025-02955-0","DOIUrl":"10.1038/s41567-025-02955-0","url":null,"abstract":"Unresolved discrepancies between isotope ratio measurements are not uncommon and have even slowed down the revision of the International System of Units, explains Juris Meija.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"21 7","pages":"1170-1170"},"PeriodicalIF":18.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144629529","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}
Nature PhysicsPub Date : 2025-07-14DOI: 10.1038/s41567-025-02981-y
{"title":"Take a tour of telescopes or tokamaks","authors":"","doi":"10.1038/s41567-025-02981-y","DOIUrl":"10.1038/s41567-025-02981-y","url":null,"abstract":"It’s never too early to plan for a regular dose of physics during your vacation. If you are looking for inspiration, we have some hidden physics gems for you.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"21 7","pages":"1029-1029"},"PeriodicalIF":18.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s41567-025-02981-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144629530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nature PhysicsPub Date : 2025-07-14DOI: 10.1038/s41567-025-02967-w
Mark Buchanan
{"title":"Too late to be careless","authors":"Mark Buchanan","doi":"10.1038/s41567-025-02967-w","DOIUrl":"10.1038/s41567-025-02967-w","url":null,"abstract":"","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"21 7","pages":"1031-1031"},"PeriodicalIF":18.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144629533","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}
Nature PhysicsPub Date : 2025-07-11DOI: 10.1038/s41567-025-02952-3
H. Zhang, N. Peshcherenko, Fazhi Yang, T. Z. Ward, P. Raghuvanshi, L. Lindsay, Claudia Felser, Yang Zhang, J.-Q. Yan, H. Miao
{"title":"Measurement of phonon angular momentum","authors":"H. Zhang, N. Peshcherenko, Fazhi Yang, T. Z. Ward, P. Raghuvanshi, L. Lindsay, Claudia Felser, Yang Zhang, J.-Q. Yan, H. Miao","doi":"10.1038/s41567-025-02952-3","DOIUrl":"10.1038/s41567-025-02952-3","url":null,"abstract":"In condensed matter, angular momentum is intimately related to the emergence of topological quantum states, including chiral superconductivity, quantum spin liquids and various chiral quasiparticles. Recently, it has been predicted that microscopic lattice excitations, known as phonons, can carry finite angular momentum, leading to specific physical properties of materials. However, phonon angular momentum has not yet been observed directly. Here we demonstrate that angular momentum conservation results in a macroscopic mechanical torque when applying a time-reversal symmetry-breaking thermal gradient along the chiral axis of single-crystal tellurium. We probe this torque using a cantilever-based device and establish that it changes sign by flipping the chirality or thermal gradient. This behavior disappears in polycrystalline samples that lack a preferred chirality. Our experimental results align well with theoretical calculations. We provide compelling evidence for phonon angular momentum, which might enable quantum states with potential applications in microelectronics. Theory predicts that phonons—quanta of lattice vibrations—can carry finite angular momentum and thus influence physical properties of materials. Now phonons with angular momentum have been seen in tellurium with a chiral crystal structure.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"21 9","pages":"1387-1391"},"PeriodicalIF":18.4,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144603305","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}
Nature PhysicsPub Date : 2025-07-11DOI: 10.1038/s41567-025-02917-6
Md Shafayat Hossain, Zi-Jia Cheng, Yu-Xiao Jiang, Tyler A. Cochran, Song-Bo Zhang, Huangyu Wu, Xiaoxiong Liu, Xiquan Zheng, Guangming Cheng, Byunghoon Kim, Qi Zhang, Maksim Litskevich, Junyi Zhang, Jinjin Liu, Jia-Xin Yin, Xian P. Yang, Jonathan D. Denlinger, Massimo Tallarida, Ji Dai, Elio Vescovo, Anil Rajapitamahuni, Nan Yao, Anna Keselman, Yingying Peng, Yugui Yao, Zhiwei Wang, Luis Balicas, Titus Neupert, M. Zahid Hasan
{"title":"Topological excitonic insulator with tunable momentum order","authors":"Md Shafayat Hossain, Zi-Jia Cheng, Yu-Xiao Jiang, Tyler A. Cochran, Song-Bo Zhang, Huangyu Wu, Xiaoxiong Liu, Xiquan Zheng, Guangming Cheng, Byunghoon Kim, Qi Zhang, Maksim Litskevich, Junyi Zhang, Jinjin Liu, Jia-Xin Yin, Xian P. Yang, Jonathan D. Denlinger, Massimo Tallarida, Ji Dai, Elio Vescovo, Anil Rajapitamahuni, Nan Yao, Anna Keselman, Yingying Peng, Yugui Yao, Zhiwei Wang, Luis Balicas, Titus Neupert, M. Zahid Hasan","doi":"10.1038/s41567-025-02917-6","DOIUrl":"10.1038/s41567-025-02917-6","url":null,"abstract":"Correlated topological materials often maintain a delicate balance among physical symmetries. Many topological orders are symmetry protected, whereas most correlated phenomena arise from spontaneous symmetry breaking. Cases where symmetry breaking induces a non-trivial topological phase are rare. Here we demonstrate the presence of two such phases in Ta2Pd3Te5, where Coulomb interactions form excitons that condense below 100 K, one with zero and the other with finite momentum. We observed a full spectral bulk gap, which stems from exciton condensation. This topological excitonic insulator state spontaneously breaks mirror symmetries but involves a weak structural coupling. Scanning tunnelling microscopy shows gapless boundary modes in the bulk insulating phase. Their magnetic field response, together with theoretical modelling, indicates a topological origin. These observations establish Ta2Pd3Te5 as a topological excitonic insulator in a three-dimensional crystal. Thus, our results manifest a unique sequence of topological exciton condensations in a bulk crystal, offering exciting opportunities to study critical behaviour and excitations. Experimental systems in which non-trivial topology is driven by spontaneous symmetry breaking are rare. Now, topological gaps resulting from two excitonic condensates have been demonstrated in a three-dimensional material.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"21 8","pages":"1250-1259"},"PeriodicalIF":18.4,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144603009","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}
Nature PhysicsPub Date : 2025-07-11DOI: 10.1038/s41567-025-02942-5
Giacomo Mazza
{"title":"Intertwined orders in a quantum material","authors":"Giacomo Mazza","doi":"10.1038/s41567-025-02942-5","DOIUrl":"10.1038/s41567-025-02942-5","url":null,"abstract":"Symmetry-protected topological orders are often in competition with electronic correlations that tend to induce orders with broken symmetry. Now, a quantum material is shown to exhibit correlation-driven tuneable excitonic instabilities intertwined with symmetry-protected topological orders.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"21 8","pages":"1181-1182"},"PeriodicalIF":18.4,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144603008","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}
Nature PhysicsPub Date : 2025-07-10DOI: 10.1038/s41567-025-02954-1
Yao Luo, Jinsoo Park, Marco Bernardi
{"title":"First-principles diagrammatic Monte Carlo for electron–phonon interactions and polaron","authors":"Yao Luo, Jinsoo Park, Marco Bernardi","doi":"10.1038/s41567-025-02954-1","DOIUrl":"10.1038/s41567-025-02954-1","url":null,"abstract":"In condensed matter, phonons—quanta of the lattice vibration field—couple with electrons, leading to the formation of entangled electron–phonon states called polarons. In the intermediate- and strong-coupling regimes common to many conventional and quantum materials, a many-body treatment of polarons requires adding up a large number of electron–phonon Feynman diagrams. In this regard, diagrammatic Monte Carlo is an efficient method for diagram summation and has been used to study polarons within simplified electron–phonon models. Here we develop diagrammatic Monte Carlo calculations based on accurate first-principles electron–phonon interactions, enabling numerically exact results for the ground-state and dynamical properties of polarons in real materials. We implement these calculations in LiF, SrTiO3, and rutile and anatase TiO2, and describe both localized and delocalized polarons. Our work enables the precise modeling of electron–phonon interactions and polarons in coupling regimes ranging from weak to strong. The results will provide deeper insights into transport phenomena, linear response and superconductivity within the strong electron–phonon coupling regime. Diagrammatic Monte Carlo calculations accurately describe polarons in different theoretical models. Now, integrating this with accurate first-principles calculations can describe the ground-state and dynamic properties of polarons in real materials.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"21 8","pages":"1275-1282"},"PeriodicalIF":18.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144593846","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}
Nature PhysicsPub Date : 2025-07-09DOI: 10.1038/s41567-025-02948-z
Diana Serrano
{"title":"Ytterbium dopants for quantum simulation","authors":"Diana Serrano","doi":"10.1038/s41567-025-02948-z","DOIUrl":"10.1038/s41567-025-02948-z","url":null,"abstract":"Understanding and controlling many-body interactions is essential for advancing quantum science. A crystal containing millions of strongly interacting ytterbium ion dopants has now been used to simulate complex quantum many-body phenomena.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"21 8","pages":"1175-1176"},"PeriodicalIF":18.4,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144586397","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}
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