Nature Physics最新文献_第4页

Emergent exchange-driven giant magnetoelastic coupling in a correlated itinerant ferromagnet 相关流动铁磁体中紧急交换驱动的巨磁弹性耦合

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-17 DOI: 10.1038/s41567-025-02893-x

Carolina A. Marques, Luke C. Rhodes, Weronika Osmolska, Harry Lane, Izidor Benedičič, Masahiro Naritsuka, Siri A. Berge, Rosalba Fittipaldi, Mariateresa Lettieri, Antonio Vecchione, Peter Wahl

{"title":"Emergent exchange-driven giant magnetoelastic coupling in a correlated itinerant ferromagnet","authors":"Carolina A. Marques, Luke C. Rhodes, Weronika Osmolska, Harry Lane, Izidor Benedičič, Masahiro Naritsuka, Siri A. Berge, Rosalba Fittipaldi, Mariateresa Lettieri, Antonio Vecchione, Peter Wahl","doi":"10.1038/s41567-025-02893-x","DOIUrl":"https://doi.org/10.1038/s41567-025-02893-x","url":null,"abstract":"The interaction between the electronic and structural degrees of freedom is central to several intriguing phenomena observed in condensed-matter physics. In magnetic materials, magnetic interactions couple to lattice degrees of freedom, resulting in magnetoelastic coupling, which is typically small and only detectable in macroscopic samples. Here we demonstrate a giant magnetoelastic coupling in the correlated itinerant ferromagnet Sr4Ru3O10. We establish an effective control of magnetism in the surface layer and utilize it to probe the impact of magnetism on its electronic and structural properties. By using scanning tunnelling microscopy, we reveal subtle changes in the electronic structure dependent on ferromagnetic or antiferromagnetic alignment between the surface and subsurface layers. We further determine the consequences of the exchange force on the relaxation of the surface layer, which exhibits giant magnetostriction. Our results provide a direct measurement of the impact of exchange interactions and correlations on structural details in a quantum material, revealing how electronic correlations result in a strong electron–lattice coupling.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"142 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144304688","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

Experimental demonstration of breakeven for a compact fermionic encoding 紧凑费米子编码的收支平衡实验证明

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-16 DOI: 10.1038/s41567-025-02931-8

Ramil Nigmatullin, Kévin Hémery, Khaldoon Ghanem, Steven Moses, Dan Gresh, Peter Siegfried, Michael Mills, Thomas Gatterman, Nathan Hewitt, Etienne Granet, Henrik Dreyer

{"title":"Experimental demonstration of breakeven for a compact fermionic encoding","authors":"Ramil Nigmatullin, Kévin Hémery, Khaldoon Ghanem, Steven Moses, Dan Gresh, Peter Siegfried, Michael Mills, Thomas Gatterman, Nathan Hewitt, Etienne Granet, Henrik Dreyer","doi":"10.1038/s41567-025-02931-8","DOIUrl":"https://doi.org/10.1038/s41567-025-02931-8","url":null,"abstract":"Solving the Fermi–Hubbard model is a central task in the study of strongly correlated materials. Digital quantum computers can, in principle, be suitable for this purpose, but have so far been limited to quasi-one-dimensional models. This is because of exponential overheads caused by the interplay of noise and the non-locality of the mapping between fermions and qubits. Here we use a trapped-ion quantum computer to experimentally demonstrate that a recently developed local encoding can overcome this problem. In particular, we show that suitable reordering of terms and application of circuit identities—a scheme called corner hopping—substantially reduces the cost of simulating fermionic hopping. This enables the efficient preparation of the ground state of a 6 × 6 spinless Fermi–Hubbard model encoded in 48 physical qubits. We also develop two error mitigation schemes for systems with conserved quantities, based on local postselection and on extrapolation of local observables, respectively. Our results suggest that Fermi–Hubbard models beyond classical simulability can be addressed by digital quantum computers without large increases in gate fidelity.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"33 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296020","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

Adaptation in doubt 适应能力存疑

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-14 DOI: 10.1038/s41567-025-02968-9

Mark Buchanan

引用次数: 0

Student interactions with generative AI 学生与生成式人工智能的互动

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-13 DOI: 10.1038/s41567-025-02932-7

W. Brian Lane

引用次数: 0

Scooping for ground states 挖掘基态

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-13 DOI: 10.1038/s41567-025-02897-7

Peter Brommer

引用次数: 0

Magmatic intrusions in real time 实时岩浆侵入

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-13 DOI: 10.1038/s41567-025-02950-5

Lishu Wu

引用次数: 0

Earth’s position in the Universe 地球在宇宙中的位置

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-13 DOI: 10.1038/s41567-025-02915-8

Karine Le Bail

引用次数: 0

Women scientists through the ages 历代的女科学家

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-13 DOI: 10.1038/s41567-025-02933-6

Nina Meinzer

引用次数: 0

Take protons for a ride 带上质子兜风

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-13 DOI: 10.1038/s41567-025-02949-y

Stefanie Reichert

{"title":"Take protons for a ride","authors":"Stefanie Reichert","doi":"10.1038/s41567-025-02949-y","DOIUrl":"https://doi.org/10.1038/s41567-025-02949-y","url":null,"abstract":"In this proof-of-principle demonstration, the team loaded around 100 protons into BASE-STEP, a 900-kg Penning-trap system. With the help of two overhead cranes and a trailer, the system was then transported across the hall of the antimatter factory to the loading bay and onto the truck. BASE-STEP features shielding, support structures and transport frames, along with an uninterruptible power supply with two battery units and a liquid helium tank to enable continuous operation of the superconducting magnet system during transport — for up to four hours. Once connected to the power grid, cryogenic temperatures could be maintained using a pulse-tube cooler.The truck covered a distance of around 3.7 kilometres and reached a maximum velocity of around 42 kilometres per hour. During this drive, Leonhardt and colleagues monitored the performance of the system, including the temperature of the superconducting magnet and the stability of the proton cloud within the trap. After bringing BASE-STEP back to its original location, the team showed that they could separate fractions of the proton cloud and eject them from the trap. This completed the successful demonstration of lossless transport of a trapped proton cloud, representing an important step towards transporting antiprotons to laboratories reachable within a four-hour limit.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"12 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144278562","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

Quasicrystal stability and nucleation kinetics from density functional theory 准晶稳定性和成核动力学的密度泛函理论

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-06-13 DOI: 10.1038/s41567-025-02925-6

Woohyeon Baek, Sambit Das, Shibo Tan, Vikram Gavini, Wenhao Sun

{"title":"Quasicrystal stability and nucleation kinetics from density functional theory","authors":"Woohyeon Baek, Sambit Das, Shibo Tan, Vikram Gavini, Wenhao Sun","doi":"10.1038/s41567-025-02925-6","DOIUrl":"https://doi.org/10.1038/s41567-025-02925-6","url":null,"abstract":"The aperiodic order of quasicrystals bridges the amorphous and crystalline regime, so it has remained unclear whether quasicrystals are metastable or stable phases of matter. Density functional theory is often used to evaluate thermodynamic stability, but quasicrystals are long-range aperiodic and their energies cannot be calculated using conventional ab initio methods. Here, we perform first-principles calculations on quasicrystal nanoparticles of increasing size, from which we can directly extrapolate their bulk and surface energies. Using this technique, we determine with high confidence that the icosahedral quasicrystals ScZn7.33 and YbCd5.7 are ground-state phases, thus revealing that translational symmetry is not a necessary condition for the zero-temperature stability of inorganic solids. Although we found the ScZn7.33 quasicrystal to be thermodynamically stable, we show on a mixed thermodynamic and kinetic phase diagram that its solidification from the melt is limited by nucleation, which illustrates why even stable materials may be kinetically challenging to grow. Our techniques broadly open the door to first-principles investigations into the structure–bonding–stability relationships of aperiodic materials.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"42 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144278564","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