Chinese Physics Letters最新文献_第9页

Unleashing the Power of Moiré Materials in Neuromorphic Computing 在神经形态计算中释放摩尔纹材料的力量

IF 3.5 2区物理与天体物理

Chinese Physics Letters Pub Date : 2023-11-27 DOI: 10.1088/0256-307X/40/12/127202

John Paul Strachan

引用次数: 0

A composite ansatz for the calculation of dynamical structure factor 用于计算动态结构因子的复合公式

IF 3.5 2区物理与天体物理

Chinese Physics Letters Pub Date : 2023-11-25 DOI: 10.1088/0256-307x/41/1/017801

Yupei Zhang, C. Mo, Ping Zhang, Wei Kang

引用次数: 0

Determination of thermal properties of unsmooth Si-nanowires 测定非光滑硅纳米线的热特性

IF 3.5 2区物理与天体物理

Chinese Physics Letters Pub Date : 2023-11-24 DOI: 10.1088/0256-307x/41/1/016301

Shi-Xian Liu, A. Barinov, Fei Yin, V. Khvesyuk

引用次数: 0

Twin capture Rydberg state excitation enhanced with few-cycle laser pulses 用少周期激光脉冲增强双捕获雷德贝格态激发

IF 3.5 2区物理与天体物理

Chinese Physics Letters Pub Date : 2023-11-21 DOI: 10.1088/0256-307x/41/1/013201

Jing Zhao, Jinlei Liu, Xiaowei Wang, Zengxiu Zhao

引用次数: 0

Effective bi-layer model Hamiltonian and density-matrix renormalization group study for the high-Tc superconductivity in La₃Ni₂O₇ under high pressure 高压下La3Ni2O7高tc超导性的有效双层模型哈密顿量和密度矩阵重整化群研究

2区物理与天体物理

Chinese Physics Letters Pub Date : 2023-11-14 DOI: 10.1088/0256-307x/40/12/127401

Yang Shen, Mingpu Qin, Guang-Ming Zhang

{"title":"Effective bi-layer model Hamiltonian and density-matrix renormalization group study for the high-Tc superconductivity in La3Ni2O7 under high pressure","authors":"Yang Shen, Mingpu Qin, Guang-Ming Zhang","doi":"10.1088/0256-307x/40/12/127401","DOIUrl":"https://doi.org/10.1088/0256-307x/40/12/127401","url":null,"abstract":"Abstract High-Tc superconductivity with possible $T_{c}approx 80K$ has been reported in the single crystal of $text{La}_{3}text{Ni}_{2}text{O}_{7}$ under high pressure. Based on the electronic structure given from the density functional theory calculations, we propose an effective bi-layer model Hamiltonian including both $3d_{z^{2}}$ and $3d_{x^{2}-y^{2}}$ orbital electrons of the nickel cations. The main feature of the model is that the $% 3d_{z^{2}}$ electrons form inter-layer $sigma$-bonding and anti-bonding bands via the apical oxygen anions between the two layers, while the $% 3d_{x^{2}-y^{2}}$ electrons hybridize with the $3d_{z^{2}}$ electrons within each NiO$_2$ plane. The chemical potential difference of these two orbital electrons ensures that the $3d_{z^{2}}$ orbitals are close to half-filling and the $3d_{x^{2}-y^{2}}$ orbitals are near quarter-filling. The strong on-site Hubbard repulsion of the $3d_{z^{2}}$ orbital electrons gives rise to an effective inter-layer antiferromagnetic spin super-exchange $J$. Applying pressure can self-dope holes on the $3d_{z^{2}}$ orbitals with the same amount of electrons doped on the $3d_{x^{2}-y^{2}}$ orbitals. By performing numerical density-matrix renormalization group calculations on a minimum setup and focusing on the limit of large $J$ and small doping of $% 3d_{z^{2}}$ orbitals, we find the superconducting instability on both the $% 3d_{z^{2}}$ and $3d_{x^{2}-y^{2}}$ orbitals by calculating the equal-time spin singlet pair-pair correlation function. Our numerical results have provided useful insights in the high-Tc superconductivity in single crystal La$_3$Ni$_2$O$_7$ under high pressure.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"36 27","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134954085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Characteristics of the Speed- Acceleration Phase Diagram of Migrating Cells 细胞迁移速度-加速度相图的特点

2区物理与天体物理

Chinese Physics Letters Pub Date : 2023-11-10 DOI: 10.1088/0256-307x/40/12/128701

Yikai Ma, Wei Chen

{"title":"Characteristics of the Speed- Acceleration Phase Diagram of Migrating Cells","authors":"Yikai Ma, Wei Chen","doi":"10.1088/0256-307x/40/12/128701","DOIUrl":"https://doi.org/10.1088/0256-307x/40/12/128701","url":null,"abstract":"Abstract The behavior of cell movement is one of the most interesting biological problems in biology, physics and medicine. In this study, we conducted experiments to investigate the characteristics of random cell motion during migration. By observing cell motion trajectories under a microscope, we employed nonlinear dynamics method to construct a speed- acceleration phase diagram. Our analysis revealed the presence of a fixed point in this phase diagram, which suggests that migrating cells possess a stable state. Cells that deviate from this stable state display a tendency to return to it, following the streamline trends of an attractor structure in the phase diagram. We derived a set of characteristic values describing cell motion, encompassing inherent speed, inherent acceleration, characteristic time for speed change, and characteristic time for acceleration change. We developed a differential equation model based on experimental data and conducted numerical calculations. The computational results align with the findings obtained from experimental results. Our research suggests that the asymmetrical characteristics observed in cell motion near an inherent speed primarily arise from the characteristics of inherent acceleration of cells.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"107 24","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135137983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Signature of superconductivity in pressurized La4Ni3O10 加压 La4Ni3O10 中的超导现象

IF 3.5 2区物理与天体物理

Chinese Physics Letters Pub Date : 2023-11-09 DOI: 10.1088/0256-307x/41/1/017401

Qing Li, Ying-Jie Zhang, Zhe-Ning Xiang, Yuhang Zhang, Xiyu Zhu, Hai-Hu Wen

{"title":"Signature of superconductivity in pressurized La4Ni3O10","authors":"Qing Li, Ying-Jie Zhang, Zhe-Ning Xiang, Yuhang Zhang, Xiyu Zhu, Hai-Hu Wen","doi":"10.1088/0256-307x/41/1/017401","DOIUrl":"https://doi.org/10.1088/0256-307x/41/1/017401","url":null,"abstract":"The discovery of high-temperature superconductivity near 80 K in bilayer nickelate La3Ni2O7 under high pressures has renewed the exploration of superconducting nickelate in bulk materials. The extension of superconductivity in other nickelates in a broader family is also essential. Here, we report the experimental observation of superconducting signature in trilayer nickelate La4Ni3O10 under high pressures. By using a modified sol-gel method and post-annealing treatment under high oxygen pressure, we successfully obtained polycrystalline La4Ni3O10 samples with different transport behaviors at ambient pressure. Then we performed high-pressure electrical resistance measurements on these samples in a diamond-anvil-cell (DAC) apparatus. Surprisingly, the signature of possible superconducting transition with a maximum transition temperature (T c) of about 20 K under high pressures is observed, as evidenced by a clear drop of resistance and the suppression of resistance drops under magnetic fields. Although the resistance drop is sample-dependent and relatively small, it appears in all of our measured samples. We argue that the observed superconducting signal is most likely to originate from the main phase of La4Ni3O10. Our findings will motivate the exploration of superconductivity in a broader family of nickelates and shed light on the understanding of the underlying mechanisms of high-T c superconductivity in nickelates.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"55 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139282199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Phase Transition Study meets Machine Learning 相变研究与机器学习

2区物理与天体物理

Chinese Physics Letters Pub Date : 2023-11-09 DOI: 10.1088/0256-307x/40/12/122101

Yu-Gang Ma, Long-Gang Pang, Rui Wang, Kai Zhou

引用次数: 1

A possible quantum spin liquid phase in the Kitaev-Hubbard model 基塔耶夫-哈伯德模型中可能的量子自旋液相

2区物理与天体物理

Chinese Physics Letters Pub Date : 2023-11-09 DOI: 10.1088/0256-307x/40/12/126403

Shaojun Dong, Hao Zhang, Chao Wang, Meng Zhang, Yong-Jian Han, Lixin He

引用次数: 0

Local Rotational Jamming and Multi-Stage Hyperuniformities in an Active Spinner System 主动旋转系统中的局部旋转干扰和多级超均匀性

2区物理与天体物理

Chinese Physics Letters Pub Date : 2023-11-08 DOI: 10.1088/0256-307x/40/12/126402

Rui Liu, Jianxiao Gong, Mingcheng Yang, Ke Chen

{"title":"Local Rotational Jamming and Multi-Stage Hyperuniformities in an Active Spinner System","authors":"Rui Liu, Jianxiao Gong, Mingcheng Yang, Ke Chen","doi":"10.1088/0256-307x/40/12/126402","DOIUrl":"https://doi.org/10.1088/0256-307x/40/12/126402","url":null,"abstract":"Abstract An active system consisting of many self-spinning dimers is simulated, and a distinct local rotational jamming transition is observed as the density increases. In the low density regime, the system stays in an absorbing state, in which each dimer rotates independently subject to the applied torque. While in the high density regime, a fraction of the dimers become rotationally jammed into local clusters, and the system exhibits microphase-separation like two-phase morphologies. For high enough densities, the system becomes completely jammed in both rotational and translational degrees of freedom. Such a simple system is found to exhibit rich and multiscale disordered hyperuniformities among the above phases: the absorbing state shows a critical hyperuniformity of the strongest class and subcritically preserves the vanishing density-fluctuation scaling up to some length scale; the locally-jammed state shows a two-phase hyperuniformity conversely beyond some length scale with respect to the phase cluster sizes; the totally jammed state appears to be a monomer crystal, but intrinsically loses large-scale hyperuniformity. These results are inspiring for designing novel phase-separation and disordered hyperuniform systems through dynamical organization.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"54 S267","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135341644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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