Science China Physics, Mechanics & Astronomy最新文献

{"title":"Topological charge density wave in kagome metal CsV3Sb5","authors":"Tiancheng Fang,&nbsp;Tianyi Hu,&nbsp;Tingfeng Zhang,&nbsp;Zhengfei Wang","doi":"10.1007/s11433-026-3010-5","DOIUrl":"10.1007/s11433-026-3010-5","url":null,"abstract":"<div><p>The topology and correlation are two significant ingredients in condensed matter physics, and it has become a research focus to intertwine them together for exploring the exotic quantum phenomena. Although charge density wave (CDW) phases have been observed in numerous solid state materials, the topological CDW is still seldom reported. In this work, based on first-principles calculations, we found that the recently discovered CDW phase in CsV₃Sb₅ is also topological nontrivial. Combining the smoking-gun signatures of nonzero topological index and in-gap topological hinge states, the second-order nontrivial topology is identified in two CDW gaps around the Fermi level. Physically, the hinge states are stacked from the corner states created by breaking the strong bonds in the CDW superlattice, illustrating a two-dimensional origin of the topological boundary states. Our results demonstrate a unique topological CDW in the Kagome metal CsV₃Sb₅, providing a chance to investigate the interplay between topology, correlation, and superconductivity.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 9","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613877","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}

{"title":"Synergistic effect of high-capacity Cu intercalation and high pressure on structural evolution and charge density wave in 2H-TaS2","authors":"Jiayi Li,&nbsp;Yiyang Zhou,&nbsp;Ruilian Tang,&nbsp;Fengshuo Liu,&nbsp;Yang Gao,&nbsp;Bin Yang,&nbsp;Bing Li,&nbsp;Fuyang Liu,&nbsp;Luhong Wang,&nbsp;Haozhe Liu,&nbsp;Yan Li","doi":"10.1007/s11433-026-3000-y","DOIUrl":"10.1007/s11433-026-3000-y","url":null,"abstract":"<div><p>While atomic intercalation can effectively modify or optimize the properties of transition metal dichalcogenides (TMDs), high pressure can directly impact their structures, enrich their electronic states, and promote the discovery of intriguing phenomena. Here, the high-capacity Cu intercalated 2<i>H</i>-TaS₂ was investigated up to 50 GPa. A dramatic change in the <i>c</i>/<i>a</i> ratio was first observed around 6.0 GPa and was confirmed to induce a Lifshitz transition, altering the Fermi surface topology. In addition, the synergistic effect of Cu intercalation and pressure in TaS₂ leads to layer sliding, ultimately resulting in the phase transition of Cu_0.65TaS₂ from 2<i>H</i> (<i>P</i>6₃/<i>mmc</i>) to 2<i>H′</i> (<i>P</i>6₃/<i>mmc</i>) phase at 11.9 GPa. Both 2<i>H</i>- and 2<i>H′</i>-Cu_0.65TaS₂ maintained metallic character without superconductivity, establishing a fundamental distinction from its parent system, 2<i>H</i>-TaS₂. It is unexpected that a charge density wave (CDW) phase transition, driven by the Lifshitz transition, was observed at 5.3 GPa based on temperature-dependent resistance data. Further compression enhanced the transition temperature (<i>T</i>_CDW) from 179 K at 5.3 GPa to 286 K (nearing room temperature) at 18.4 GPa. The combination of high-capacity intercalation and high pressure has revealed exotic phenomena that neither method alone can achieve, offering a practical way to develop new materials for different application scenarios.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 9","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613499","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}

{"title":"Mid-wave infrared miniature spectrometer based on the compositional gradient of HgCdTe","authors":"Ruotong Yin,&nbsp;Qianru Zhao,&nbsp;Yan Chen,&nbsp;Wenxin Li,&nbsp;Tao Hu,&nbsp;Dongyang Zhao,&nbsp;Haoran Yan,&nbsp;Hanxue Jiao,&nbsp;Tie Lin,&nbsp;Hong Shen,&nbsp;Xiangjian Meng,&nbsp;Wei Bai,&nbsp;Xudong Wang,&nbsp;Junhao Chu,&nbsp;Jianlu Wang","doi":"10.1007/s11433-026-3016-y","DOIUrl":"10.1007/s11433-026-3016-y","url":null,"abstract":"<div><p>Spectrometers that operate without dispersive optics or filter arrays offer a compact route toward integrated mid-infrared sensing. However, a key challenge is to effectively encode and decode wavelength information within a single detector. Here, we demonstrate a bias-tunable spectrometer based on composition-graded Hg_1−<i>x</i>Cd_<i>x</i>Te (HgCdTe), in which a continuous bandgap gradient enables electrically controlled spectral selectivity over the 2–3 µm range. A planar n-on-p junction is embedded within the graded absorber, allowing the depletion region to extend into narrower-bandgap regions under applied bias, resulting in a systematic red-shift of the spectral response. Spectral information encoded in the bias-dependent current-voltage (<i>I</i>-<i>V</i>) characteristics is decoded using an implicit response matrix learning (IRML) framework. A supervised neural network directly learns the nonlinear mapping from <i>I</i>-<i>V</i> curves to incident spectra without explicit response matrix calibration. Accurate reconstruction is achieved for broadened monochromatic inputs, densely sampled sequential narrowband inputs, and experimentally measured spectra. A mid-wave infrared imaging proof-of-concept further visualizes bias-dependent spectral contrast via differential imaging. Together, these results demonstrate a compact and electrically tunable HgCdTe spectrometer architecture compatible with scalable HgCdTe detector technology.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 9","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613089","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}

{"title":"Exploring dynamic heterogeneity of metallic glass via anomalous creep","authors":"Xiyang Ma,&nbsp;Si-Jin Zhao,&nbsp;Yun-Jiang Wang,&nbsp;Jiong Zhou,&nbsp;Guanghui Xing,&nbsp;Daniel Crespo,&nbsp;Eloi Pineda,&nbsp;Yong Yang,&nbsp;Jichao Qiao","doi":"10.1007/s11433-026-2948-2","DOIUrl":"10.1007/s11433-026-2948-2","url":null,"abstract":"<div><p>The dynamic heterogeneity is an inherent nature of metallic glasses (MGs) due to their inhomogeneous structure down to the atomic scale. However, a quantitative relationship between the dynamic features and deformation modes of MGs is still not fully established. In this work, extensive creep experiments and dynamic mechanical analysis were conducted over a wide range of temperature, stress, time, and frequency to quantitatively explore the dynamic heterogeneity over multiple timescales. Creep is found to be governed by a diffusive-like mechanism with increasing activation Helmholtz free energy at longer times. Unexpectedly, the activation volume exhibits an increasing trend with temperature, in sharp contrast with the creep in crystalline materials, in which activation parameters remain constant with a unique creep mechanism. The state-of-the-art activation-relaxation technique unveils the correlation between the dynamic heterogeneity of MGs and the spatial distribution of the potential energy landscape. Activation barriers are overcome successively from small to large with increasing temperature, stress, or equivalently, longer times. A free energy barrier probability distribution model, considering both forward and backward activated fluxes of the deformation elements, is proposed for the whole creep process. This scenario of anomalous creep accommodated by the heterogeneous dynamics is consistently confirmed by the creep experiments and atomic-scale simulations. We thus propose a general creep description to quantitatively explore the dynamic heterogeneity of disordered materials. The consistent experimental, theoretical, and atomistic insights challenge the usual concepts of creep developed for crystals to comprehend the heterogeneous dynamics of amorphous metals.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 9","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613308","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}

{"title":"Heavy electron behavior in a natural 3d-transition-metal based superlattice","authors":"Yi-Qiang Lin,&nbsp;Si-Qi Wu,&nbsp;Yun-Lei Sun,&nbsp;Bing-Ke Ji,&nbsp;Jia-Xin Li,&nbsp;Hua-Xun Li,&nbsp;Yi Liu,&nbsp;Jia-Yi Lu,&nbsp;Chang-Chao Liu,&nbsp;Hao Jiang,&nbsp;Yao-Min Dai,&nbsp;Hai-Hu Wen,&nbsp;Guang-Han Cao","doi":"10.1007/s11433-026-3022-0","DOIUrl":"10.1007/s11433-026-3022-0","url":null,"abstract":"<div><p>Heavy electron (HE) systems are exemplary quantum materials, showing massive quasiparticles and emergent exotic quantum phenomena. Currently, most HE materials are those with certain <i>f</i> electrons, while <i>d</i>-electron-based HE systems are rare and underexplored. Here we report the realization of a novel HE state in a natural 3<i>d</i>-electron transition-metal superlattice, Th₂Cr₂Fe₂Ge₄C, comprising alternating [Cr₂Ge₂C] and [Fe₂Ge₂] sublattices, which possess flat bands and potential for strong electron correlations, respectively. Electrical resistivity measurements reveal a non-Fermi liquid (NFL) behavior, signaling quantum criticality from the [Cr₂Ge₂C] sublattice. Specific heat data show a large Sommerfeld coefficient, <i>γ</i> = (103.5 ± 0.8) mJ mol⁻¹ K⁻², matching established heavy fermion benchmarks. Furthermore, the Drude responses confirm the enhancement of quasiparticle mass. These experimental results, combined with theoretical calculations, demonstrate a cascade of interlayer-hybridization-induced effects that drive the HE state alongside NFL behavior. Our work establishes a viable strategy to design new types of HE materials.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 9","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613309","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}

{"title":"Optimal fidelity-cost trade-off in DNA polymerase proofreading","authors":"Qi Jia,&nbsp;Qiushi Li,&nbsp;Hang Fu,&nbsp;Hao Wang,&nbsp;Dongfei Ma,&nbsp;Ming Li,&nbsp;Ying Lu,&nbsp;Ming Li","doi":"10.1007/s11433-026-2978-9","DOIUrl":"10.1007/s11433-026-2978-9","url":null,"abstract":"<div><p>DNA polymerases (DNAPs) catalyze DNA replication by coordinating the polymerase and exonuclease activities to enhance the fidelity through exonuclease proofreading at the cost of additional dNTP consumption. Whether and how DNAPs achieve an optimal or even a robust optimal fidelity-cost trade-off remains elusive. By building a ladder-like model to describe the synthesis-excision kinetics and adopting an objective function <i>Q</i> to explicitly quantify the trade-off, we revealed by <i>Q</i> maximization that DNAPs, having long-range mismatch sensing and complex excision modes, could fine-tune key parameters that are intrinsic to excision to achieve an optimal fidelity-cost trade-off, which is robust to large fluctuations in synthesis-specific parameters. Part of the predictions on the key parameters were validated by high-resolution single-molecule assays on two DNAPs (KF and gp5). Our work reveals a new and potentially universal optimization strategy of DNAPs, and also offers a new perspective to understand the architecture of molecular machines with distinctly separated multiple domains, i.e., the structural modularity may enable robust functional optimization of the machine if part of its domains are subject to fluctuating parameters.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 8","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380354","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}

{"title":"Axial jet and pinch-off scalings in attached buoyant bubbles","authors":"Lintao Zhou,&nbsp;Ruinan Cui,&nbsp;A-Man Zhang,&nbsp;Zirui Liu,&nbsp;Shuai Li","doi":"10.1007/s11433-026-2997-0","DOIUrl":"10.1007/s11433-026-2997-0","url":null,"abstract":"<div><p>This study investigates the unsteady evolution of buoyant oscillating bubbles situated near a rigid boundary via a boundary integral (BI) approach, with a primary objective of identifying universal patterns in axial and annular jetting. We verify the BI simulation against several purposely conducted experiments on electric-discharge bubbles performed inside a depressurized tank. Four collapse patterns of the bubble are identified, namely, (i) downward jet towards the wall, (ii) upward jet, (iii) bubble pinch-off caused by an annular jet, and (iv) quasi-spherical collapse. We categorize them in a phase diagram in the <i>γ</i>-<i>δ</i> parameter space (0 ≼ <i>γ</i> ≼ 2, 0 ≼ <i>δ</i> ≼ 0.6), where <i>γ</i> and <i>δ</i> are the dimensionless standoff parameter and buoyancy parameter, respectively. A new ‘upward jet regime’ is found for a large-buoyancy bubble (<i>γ</i> ≽ 0.3) initially attached to or very close to the wall (<i>γ</i> ≼ 0.5), in which an annular focusing flow causes a complete detachment of the bubble from the wall and further drives an upward liquid jet. In the downward jet regime, the axial jet velocity is found to exhibit a power-law scaling in the maximum curvature of the bubble surface <i>κ</i>, i.e., <i>V</i>_jet = <i>ηκ</i>^0.7±0.04, but with a different prefactor <i>η</i> depending on <i>γ</i>. As for the annular jet, the neck radius evolution of the bubble substantially deviates from the classic scaling <i>R</i>_<i>n</i> ∝ <i>τ</i>^0.5, where <i>τ</i> represents the time remaining before the pinch-off event. A logarithmic correction, <i>y</i> = <i>R</i>_<i>n</i>(− ln <i>R</i>_<i>n</i>)^1/4 (Gordillo et al., [Phys. Rev. Lett. <b>96</b>, 194501 (2005)]), makes the effective exponent <i>α</i>_<i>y</i> closer to 0.5, <i>α</i>_<i>y</i> = 0.535 ± 0.004, but cannot account for all the deviations. Importantly, we demonstrate that the annular jet dynamics does not reach a universal regime. Instead, the extracted exponents depend on the specific simulation setup, falling between the theoretical predictions of Gordillo et al. [Phys. Rev. Lett. <b>96</b>, 194501 (2005)] and Eggers et al. [Phys. Rev. Lett. <b>98</b>, 094502 (2007)]. This non-universality highlights that the bubble pinch-off dynamics exhibits a weak dependence on the initial dimensionless parameters, a consequence of the slow logarithmic convergence of the governing dynamics.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 8","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380416","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}

{"title":"Development and application of an eV neutron polarization for parity violation studies at CSNS Back-n beamline","authors":"Xu Qin,&nbsp;Tianhao Wang,&nbsp;Xuanbo Chen,&nbsp;Changdong Deng,&nbsp;Yongce Gong,&nbsp;Zenghang Huang,&nbsp;Wei Jiang,&nbsp;Zhengquan Liu,&nbsp;Guangyuan Luan,&nbsp;Haotian Luo,&nbsp;Qiuyue Luo,&nbsp;Yongjia Lv,&nbsp;You Lv,&nbsp;Nikolaos Vassilopoulos,&nbsp;Xichao Ruan,&nbsp;William Michael Snow,&nbsp;Kang Sun,&nbsp;Sepehr Samiei,&nbsp;Jian Tang,&nbsp;Shilin Wang,&nbsp;Hongyi Wu,&nbsp;Xiaomin Xiong,&nbsp;Xinyu Yuan,&nbsp;Junpei Zhang,&nbsp;Mofan Zhang,&nbsp;Qiwei Zhang,&nbsp;Qingbo Zheng,&nbsp;Ruirui Fan,&nbsp;Xin Tong","doi":"10.1007/s11433-026-2979-6","DOIUrl":"10.1007/s11433-026-2979-6","url":null,"abstract":"<div><p>The dynamic enhancement of symmetry-breaking effects in neutron-nucleus resonances provides a sensitive testing ground for Time-Reversal Invariance Violation (TRIV). Exploiting this mechanism, the Neutron Optics Parity and Time Reversal Experiment (NOPTREX) seeks to elucidate the origin of the universe’s baryon asymmetry. Critical to this effort is the precise measurement of Parity Violation (PV) asymmetries, which is essential to calibrate the nuclear parameters required for future TRIV experiments. To facilitate these studies, we developed an eV polarized neutron at the Back-n white neutron beamline of the China Spallation Neutron Source (CSNS). Neutron polarization is generated by an <i>in-situ</i> Spin-Exchange Optical Pumping (SEOP) ³He filter. Spin manipulation is performed by an adiabatic spin flipper, while spin polarization is preserved over the flight path by a vacuum transport system equipped with a solenoidal guide field. Experiments successfully measured an asymmetry of approximately 7.8% ± 2.4 (stat.)% ± 0.3(sys.)% at the 0.750 eV p-wave resonance of ¹³⁹La. These results are in agreement with previous results on this resonance and validate the system’s capability for PV measurements.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 8","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11433-026-2979-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466359","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}

{"title":"Internal dynamics of the progenitors of massive star clusters","authors":"Philippe André","doi":"10.1007/s11433-026-3018-3","DOIUrl":"10.1007/s11433-026-3018-3","url":null,"abstract":"","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 8","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380932","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}

{"title":"Noise-resistant optical computing system based on delta-sigma modulation","authors":"Yan-Feng Bi,&nbsp;Xin-Chang Liu,&nbsp;Xiao-Lei Zhang,&nbsp;Yong-Pan Gao,&nbsp;Chuan Wang","doi":"10.1007/s11433-026-2995-7","DOIUrl":"10.1007/s11433-026-2995-7","url":null,"abstract":"<div><p>To meet the growing demand for computing power, photonic computing plays a crucial role in fields such as signal processing and artificial intelligence. However, the noise immunity of existing photonic computing systems still needs improvement due to factors such as noise accumulation and limitations in analog-to-digital converter (ADC) resolution. In this work, we propose a photonic dot-product calculation scheme based on delta-sigma modulation (DSM) to improve computational accuracy. At the transmitter, the proposed scheme converts high-precision data into binary digital signals. Simultaneously, the receiver only requires a low-pass filter to recover the high-precision calculation result. Experimental results show that for dot-product operations on arbitrary 8-bit data, the mean square error (RMSE) of the DSM scheme output is only on the order of 2 × 10⁻². Moreover, this scheme only requires an 8-bit ADC to obtain the complete result. Then, we build a photoelectric hybrid neural network based on the proposed scheme to implement an iris flower classification task. When the system noise level is 5 dB, the classification accuracy of the DSM scheme reaches 93.33%, which is approximately 33% higher than the classical analog scheme. Therefore, the proposed scheme provides an effective approach to realizing a reconfigurable, high-precision photonic computing architecture.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 8","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380931","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}