Science China Physics, Mechanics & Astronomy最新文献_第2页

Fullerphene: A double covalently bonded two-dimensional fullerene semiconducting crystal with preserved Dirac states and emergent flat bands 富勒烯：一种双共价键的二维富勒烯半导体晶体，具有保留的狄拉克态和涌现的平带

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-09-08 DOI: 10.1007/s11433-025-2739-x

Yandi Zhu, Xiaoyan Ren, Xinlian Xue, Xigui Yang, Chongxin Shan, Xingju Zhao, Shunfang Li, Zhenyu Zhang

{"title":"Fullerphene: A double covalently bonded two-dimensional fullerene semiconducting crystal with preserved Dirac states and emergent flat bands","authors":"Yandi Zhu, Xiaoyan Ren, Xinlian Xue, Xigui Yang, Chongxin Shan, Xingju Zhao, Shunfang Li, Zhenyu Zhang","doi":"10.1007/s11433-025-2739-x","DOIUrl":"10.1007/s11433-025-2739-x","url":null,"abstract":"<div>The discovery of each new allotropic manifestation of carbon has substantially propelled contemporary scientific research and applications, as vividly exemplified by the explosive progressions within the realms of fullerene, carbon nanotube, graphene, and diamond sciences over recent decades. Here, using state-of-the-art first-principles calculations, we predict a new type of two- dimensional carbon network, dubbed fullerphene, by replacing each C atom in graphene with a fullerene (C[in60}). Its high energetic stability is tied to the symmetric cycloaddition of the double bonds between each C[in60} superatom with each of its three neighbors. A kinetic pathway is also proposed for the selective fabrication of fullerphene on Cu(111) or Rh(111), upon exploiting its en- hanced stability over other competing C[in60} assemblies and significantly lowered kinetic barrier in seed growing, as strategically supported by a recent experimental advance. Further investigations on fullerphene reveal an array of desirable characteristics, including a substantial band gap of ~2 eV, Dirac states for the conduction electrons, and flat bands for the valence electrons. These findings represent a distinctly new and significant advance in both fullerene and graphene sciences.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 12","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037478","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 new strategy for exploring room-temperature superconductivity in hydrides at ambient pressure 探索室温下氢化物超导性的新策略

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-08-26 DOI: 10.1007/s11433-025-2750-1

X. C. Xie

引用次数: 0

The theory of “electride-carrier” precompression “电极-载流子”预压缩理论

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-08-19 DOI: 10.1007/s11433-025-2745-4

Zhongyu Wan, Guo-Hua Zhong, Ruiqin Zhang, Hai-Qing Lin

{"title":"The theory of “electride-carrier” precompression","authors":"Zhongyu Wan, Guo-Hua Zhong, Ruiqin Zhang, Hai-Qing Lin","doi":"10.1007/s11433-025-2745-4","DOIUrl":"10.1007/s11433-025-2745-4","url":null,"abstract":"<div>Room-temperature superconductivity is predominantly observed in high-pressure hydrides, but faces a formidable hurdle: the tendency of these materials to decompose and forfeit their superconducting prowess upon pressure release. Consequently, stabilizing room-temperature superconductivity under ambient conditions has emerged as a pressing concern in solid-state physics. Electrides are unique compounds, possessing exceptional properties attributed to the clustering of high-energy excess electrons within the interstices of their lattices. Our theory outlines a general blueprint for achieving ambient superconductivity through the strategic insertion of hydrogen into the interstitial spaces of electride materials. This ingenious approach harnesses quasimolecular H2 to sequester high-energy electrons, resulting in a substantial density of electronic states at the Fermi level and fostering robust electron-phonon coupling. We implemented this strategy within the realm of alkali metal electrides, fine-tuning their stability via carrier doping effects, grounded in rigorous quantum chemical analyses of pressure-induced chemical bonds. As a result, the KH6 compound exhibits an exceptional superconducting transition temperature of 222 K at a modest 10 GPa, outperforming previously reported high-pressure superconductors like H3S (203 K at 155 GPa) and LaH10 (250 K at 170 GPa). Furthermore, the hole-doped NaH6 compound demonstrates superconductivity at ambient pressure with a remarkable Tc of 167 K, surpassing the previous record-holder HgBa2Ca2Cu3O8 with 134 K.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 10","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144891354","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

Image of a time-dependent rotating regular black hole 随时间旋转的规则黑洞的图像

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-08-19 DOI: 10.1007/s11433-025-2756-9

Sen Guo, En-Wei Liang, Yu-Xiang Huang, Yu Liang, Qing-Quan Jiang, Kai Lin, Li-Fang Li

{"title":"Image of a time-dependent rotating regular black hole","authors":"Sen Guo, En-Wei Liang, Yu-Xiang Huang, Yu Liang, Qing-Quan Jiang, Kai Lin, Li-Fang Li","doi":"10.1007/s11433-025-2756-9","DOIUrl":"10.1007/s11433-025-2756-9","url":null,"abstract":"<div>In this study, we develop a modeling framework based on spatio-temporal generalized random fields to simulate the time-evolving accretion flows and their associated imaging signatures around rotating regular black holes. We extend the Matérn field formalism to the spatio-temporal domain and introduce a locally anisotropic tensor structure Λ(x), which encodes direction-dependent correlation scales motivated by Keplerian velocity fields, thereby generating physically informed perturbation structures. Coupled with a computationally efficient light ray-tracing scheme, this framework produces a sequence of time-resolved images of regular black hole shadows and accretion structures. By incorporating light-travel time effects, we identify significant temporal smearing of features within strongly lensed regions and rapidly varying sources, thus enhancing the physical realism of the modeling. Comparison with existing general relativistic magnetohydrodynamic simulations demonstrates that our stochastic generative model maintains statistical consistency while offering substantial computational efficiency. Moreover, the simulated results reproduce the dynamic positional shift of the bright ring structure observed in M87*, providing theoretical support for interpreting its time-variable images.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 10","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144914754","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

Tunable spin-electric-field coupling for spin qubit control 用于自旋量子比特控制的可调谐自旋-电场耦合

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-08-15 DOI: 10.1007/s11433-025-2762-7

Xuedong Hu

引用次数: 0

CSST cosmological emulator II: Generalized accurate halo mass function emulation CSST宇宙仿真器II：广义精确光晕质量函数仿真

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-08-15 DOI: 10.1007/s11433-025-2764-x

Zhao Chen, Yu Yu

{"title":"CSST cosmological emulator II: Generalized accurate halo mass function emulation","authors":"Zhao Chen, Yu Yu","doi":"10.1007/s11433-025-2764-x","DOIUrl":"10.1007/s11433-025-2764-x","url":null,"abstract":"<div>Accurate theoretical prediction for halo mass function across a broad cosmological space is crucial for the forthcoming Chinese Space Station Survey Telescope (CSST) observations, which will capture cosmological information from multiple probes, e.g., cluster abundance, and weak lensing. In this work, we quantify the percent-level impact of different mass binning schemes when measuring the differential halo mass function from simulations, and demonstrate that the cumulative form of the halo mass function is independent of the binning scheme. Through the recently finished Kun simulation suite, we propose a generalized framework to construct multiple accurate halo mass function emulators for different halo mass definitions, including M200m, Mvir, and M200c. This extends our CSST Emulator to provide fast and accurate halo mass function predictions for halo mass M ⩾ 1012h−1M⊙ up to z = 3.0. For redshifts z ⩽ 1.0, the accuracy is within 2% for M ⩽ 1013h−1M⊙, 5% for M ⩽ 1014h−1M⊙, and 10% for M ⩽ 1015h−1M⊙, which is comparable with the statistical errors of training simulations. This tool is integrated in CSST Emulator and publicly available at https://github.com/czymh/csstemu, providing a fast and accurate theoretical tool to obtain unbiased cosmological constraints of the upcoming CSST survey.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 10","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144888043","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 algorithms for uncertainty quantification: Applications to partial differential equations 不确定性量化的量子算法：在偏微分方程中的应用

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-08-15 DOI: 10.1007/s11433-024-2705-7

Francoise Golse, Shi Jin, Nana Liu

{"title":"Quantum algorithms for uncertainty quantification: Applications to partial differential equations","authors":"Francoise Golse, Shi Jin, Nana Liu","doi":"10.1007/s11433-024-2705-7","DOIUrl":"10.1007/s11433-024-2705-7","url":null,"abstract":"<div>Most problems in uncertainty quantification, despite their ubiquitousness in scientific computing, applied mathematics and data science, remain formidable on a classical computer. For uncertainties that arise in partial differential equations (PDEs), large numbers M ≫ 1 of samples are required to obtain accurate ensemble averages. This usually involves solving the PDE M times. In addition, to characterise the stochasticity in a PDE, the dimension L of the random input variables is high in most cases, and classical algorithms suffer from the curse-of-dimensionality. We propose new quantum algorithms for PDEs with uncertain coefficients that are more efficient in M and L in various important regimes, compared to their classical counterparts. We introduce transformations that convert the original d-dimensional equation (with uncertain coefficients) into d + L (for dissipative equations) or d + 2L (for wave type equations) dimensional equations (with certain coefficients) in which the uncertainties appear only in the initial data. These transformations also allow one to superimpose the M different initial data, so the computational cost for the quantum algorithm to obtain the ensemble average from M different samples is independent of M, while also showing potential advantage in d, L and precision ϵ in computing ensemble averaged solutions or physical observables.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 10","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144888041","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

Theoretical advances in time-resolved imaging of rotating regular black holes: A spatio-temporal stochastic framework 旋转规则黑洞时间分辨成像的理论进展：一个时空随机框架

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-08-15 DOI: 10.1007/s11433-025-2763-6

Wen Zhao

引用次数: 0

The (in)stability of quasinormal modes of Boulware-Deser-Wheeler black hole in the hyperboloidal framework 双曲框架中Boulware-Deser-Wheeler黑洞拟正规模的稳定性

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-08-12 DOI: 10.1007/s11433-025-2714-7

Li-Ming Cao, Liang-Bi Wu, Yu-Sen Zhou

{"title":"The (in)stability of quasinormal modes of Boulware-Deser-Wheeler black hole in the hyperboloidal framework","authors":"Li-Ming Cao, Liang-Bi Wu, Yu-Sen Zhou","doi":"10.1007/s11433-025-2714-7","DOIUrl":"10.1007/s11433-025-2714-7","url":null,"abstract":"<div>We study the quasinormal modes of Boulware-Deser-Wheeler black hole in Einstein-Gauss-Bonnet gravity theory within the hyperboloidal framework. The effective potentials for the test Klein-Gordon field and gravitational perturbations of scalar, vector, and tensor types are thoroughly investigated and put into several typical classes. The effective potentials for the gravitational perturbations have more diverse behaviors than those in general relativity, such as double peaks, the existence of a negative region adjacent to or far away from the event horizon. These lead to the existence of unstable modes (Imω < 0), and the presence of gravitational wave echoes. These rich phenomena are inherent in Einstein-Gauss-Bonnet theory, rather than artificially introduced by hand. What’s more, the (in)stability of quasinormal modes is studied in the frequency domain and time domain, respectively. For the frequency domain, the pseudospectrum is used to account for the instability of the spectrum. For the time domain, we add a small bump to the effective potential, and find that the new waveform does not differ significantly from the original one, where the comparison is characterized by the so-called mismatch functions. This means that quasinormal modes are stable in the time domain regardless of the shapes of the original effective potentials. In this way, our study reveals the non-equivalence of the stability of quasinormal modes in the frequency domain and the time domain. Besides, we also numerically investigate Price’s law at both finite distances and infinity with the assistance of the hyperboloidal approach.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 10","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144843193","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

Probing the dimension-dependent magnetic order transition in NiPS3 with magnon spin current 利用磁振子自旋电流探测NiPS3中与尺寸相关的磁序跃迁

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-08-12 DOI: 10.1007/s11433-025-2748-1

Bingcheng Luo, Shaomian Qi, Shiqiang Liu, Linhao Jia, Xinyu Kang, Di Chen, X. C. Xie, Jian-Hao Chen

{"title":"Probing the dimension-dependent magnetic order transition in NiPS3 with magnon spin current","authors":"Bingcheng Luo, Shaomian Qi, Shiqiang Liu, Linhao Jia, Xinyu Kang, Di Chen, X. C. Xie, Jian-Hao Chen","doi":"10.1007/s11433-025-2748-1","DOIUrl":"10.1007/s11433-025-2748-1","url":null,"abstract":"<div>Magnon, the quanta of spin wave, low energy excitation from magnetic ground state, not only carries spin angular momentum which is of crucial importance in new generation of information technology, but also serves as powerful probes for investigating the corresponding ground-state properties. Here, we investigate magnetic order transitions in the antiferromagnetic van der Waals insulator NiPS3 using non-local magnon transport. We observe a dimensional cross-over behavior with a critical thickness of approximately 12–14 nm. Below the threshold, the thermally activated magnon carries angular momentum that is opposite to the conventional case, corresponding to the vestigial order with higher symmetry. While above this critical thickness, where NiPS3 exhibits in-plane zigzag antiferromagnetic order with lower symmetry, the thermally activated magnon signals show anomalous high-magnetic-field responses. After the spin-flop transition, the Néel vector becomes strongly pinned near the a-axis, resulting in a flattening of the detected signals that can only be switched when the magnetic field is oriented perpendicular to the Néel vector. These findings demonstrate that magnon spin currents provide an effective means to investigate exotic orders and phase transitions in van der Waals magnetic insulators, offering new insights for both fundamental research and potential applications in spin-based technologies.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 12","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144843192","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