Chinese Physics B最新文献_第5页

Quantum block coherence with respect to projective measurements 关于投影测量的量子块相干性

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-31 DOI: 10.1088/1674-1056/ad50c1

Pu Wang, 璞王, Zhong-Yan Li, 忠艳李, Hui-Xian Meng and 会贤孟

引用次数: 0

Integrated analysis of plasma rotation effect on HL-3 hybrid scenario 等离子体旋转效应对 HL-3 混合方案的综合分析

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-31 DOI: 10.1088/1674-1056/ad43d3

Miao Xue, 淼薛, Guo-Yao Zheng, 国尧郑, Lei Xue, 雷薛, Jia-Xian Li, 佳鲜李, Shuo Wang, 硕王, Hai-Long Du, 海龙杜, Yi-Ren Zhu, 毅仁朱, Yue Zhou and 月周

{"title":"Integrated analysis of plasma rotation effect on HL-3 hybrid scenario","authors":"Miao Xue, 淼薛, Guo-Yao Zheng, 国尧郑, Lei Xue, 雷薛, Jia-Xian Li, 佳鲜李, Shuo Wang, 硕王, Hai-Long Du, 海龙杜, Yi-Ren Zhu, 毅仁朱, Yue Zhou and 月周","doi":"10.1088/1674-1056/ad43d3","DOIUrl":"https://doi.org/10.1088/1674-1056/ad43d3","url":null,"abstract":"The hybrid scenario, which has good confinement and moderate MHD instabilities, is a proposed operation scenario for international thermonuclear experimental reactor (ITER). In this work, the effect of plasma rotation on the HL-3 hybrid scenario is analyzed with the integrated modeling framework OMFIT. The results show that toroidal rotation has no obvious effect on confinement with a high line averaged density of nbar ∼ 7 × 1019 m−3. In this case, the ion temperature only changes from 4.7 keV to 4.4 keV with the rotation decreasing from 105 rad/s to 103 rad/s, which means that the turbulent heat transport is not dominant. While in the scenarios characterized by lower densities, such as nbar ∼ 4 × 1019 m−3, turbulent transport becomes dominant in determining heat transport. The ion temperature rises from 3.8 keV to 6.1 keV in the core as the rotation velocity increases from 103 rad/s to 105 rad/s. Despite the ion temperature rising, the rotation velocity does not obviously affect electron temperature or density. Additionally, it is noteworthy that the variation in rotation velocity does not significantly affect the global confinement of plasma in scenarios with low density or with high density.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":"10 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141948747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Absence of BCS–BEC crossover in FeSe0.45Te0.55 superconductor FeSe0.45Te0.55 超导体中不存在 BCS-BEC 交叉

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-01 DOI: 10.1088/1674-1056/ad51f9

Junjie Jia, Yadong Gu, Chaohui Yin, Yingjie Shu, Yiwen Chen, Jumin Shi, Xing Zhang, Hao Chen, Taimin Miao, Xiaolin Ren, Bo Liang, Wenpei Zhu, Neng Cai, Fengfeng Zhang, Shenjin Zhang, Feng Yang, Zhimin Wang, Qinjun Peng, Zuyan Xu, Hanqing Mao, Guodong Liu, Zhian Ren, Lin Zhao, Xing-Jiang Zhou

{"title":"Absence of BCS–BEC crossover in FeSe0.45Te0.55 superconductor","authors":"Junjie Jia, Yadong Gu, Chaohui Yin, Yingjie Shu, Yiwen Chen, Jumin Shi, Xing Zhang, Hao Chen, Taimin Miao, Xiaolin Ren, Bo Liang, Wenpei Zhu, Neng Cai, Fengfeng Zhang, Shenjin Zhang, Feng Yang, Zhimin Wang, Qinjun Peng, Zuyan Xu, Hanqing Mao, Guodong Liu, Zhian Ren, Lin Zhao, Xing-Jiang Zhou","doi":"10.1088/1674-1056/ad51f9","DOIUrl":"https://doi.org/10.1088/1674-1056/ad51f9","url":null,"abstract":"In iron-based superconductor Fe(Se,Te), a flat band-like feature near the Fermi level was observed around the Brillouin zone center in the superconducting state. It is under debate whether this is the evidence on the presence of the BCS–BEC [Bardeen–Cooper–Schrieffer (BCS), Bose–Einstein condensation (BEC)] crossover in the superconductor. High-resolution laser-based angle-resolved photoemission measurements are carried out on high quality single crystals of FeSe0.45Te0.55 superconductor to address the issue. By employing different polarization geometries, we have resolved and isolated the d<italic toggle=\"yes\">yz</italic> band and the topological surface band, making it possible to study their superconducting behaviors separately. The d<italic toggle=\"yes\">yz</italic> band alone does not form a flat band-like feature in the superconducting state and the measured dispersion can be well described by the BCS picture. We find that the flat band-like feature is formed from the combination of the d<italic toggle=\"yes\">yz</italic> band and the topological surface state band in the superconducting state. These results reveal the origin of the flat band-like feature and rule out the presence of BCS-BEC crossover in Fe(Se,Te) superconductor.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":"11 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141867389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Nonlinear time-reversal interferometry with arbitrary quadratic collective-spin interaction 具有任意二次集体自旋相互作用的非线性时间反转干涉测量法

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-01 DOI: 10.1088/1674-1056/ad4ff7

Zhiyao Hu, Qixian Li, Xuanchen Zhang, He-Bin Zhang, Long-Gang Huang, Yong-Chun Liu

引用次数: 0

Topological phases and edge modes of an uneven ladder 不均匀阶梯的拓扑相位和边缘模式

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-01 DOI: 10.1088/1674-1056/ad50c0

Wen-Chuang Shang, Yi-Ning Han, Shimpei Endo, Chao Gao

{"title":"Topological phases and edge modes of an uneven ladder","authors":"Wen-Chuang Shang, Yi-Ning Han, Shimpei Endo, Chao Gao","doi":"10.1088/1674-1056/ad50c0","DOIUrl":"https://doi.org/10.1088/1674-1056/ad50c0","url":null,"abstract":"We investigate the topological properties of a two-chain quantum ladder with uneven legs, i.e., the two chains differ in their periods by a factor of 2. Such an uneven ladder presents rich band structures classified by the closure of either direct or indirect bandgaps. It also provides opportunities to explore fundamental concepts concerning band topology and edge modes, including the difference of intracellular and intercellular Zak phases, and the role of the inversion symmetry (IS). We calculate the Zak phases of the two kinds and find excellent agreement with the dipole moment and extra charge accumulation. We also find that configurations with IS feature a pair of degenerate two-side edge modes emerging as the closure of the direct bandgap, while configurations without IS feature one-side edge modes emerging as not only the closure of both direct and indirect bandgaps but also within the band continuum. Furthermore, by projecting to the two sublattices, we find that the effective Bloch Hamiltonian corresponds to that of a generalized Su–Schrieffer–Heeger model or the Rice–Mele model whose hopping amplitudes depend on the quasimomentum. In this way, the topological phases can be efficiently extracted through winding numbers. We propose that uneven ladders can be realized by spin-dependent optical lattices and their rich topological characteristics can be examined by near future experiments.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":"80 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141883991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Negligible normal fluid in superconducting state of heavily overdoped Bi2Sr2CaCu2O8+δ detected by ultra-low temperature angle-resolved photoemission spectroscopy 超低温角分辨光发射光谱探测到重度过掺杂 Bi2Sr2CaCu2O8+δ 超导态中的微量正流体

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-01 DOI: 10.1088/1674-1056/ad51f8

Chaohui Yin, Qinghong Wang, Yuyang Xie, Yiwen Chen, Junhao Liu, Jiangang Yang, Junjie Jia, Xing Zhang, Wenkai Lv, Hongtao Yan, Hongtao Rong, Shenjin Zhang, Zhimin Wang, Nan Zong, Lijuan Liu, Rukang Li, Xiaoyang Wang, Fengfeng Zhang, Feng Yang, Qinjun Peng, Zuyan Xu, Guodong Liu, Hanqing Mao, Lin Zhao, Xintong Li, Xingjiang Zhou

{"title":"Negligible normal fluid in superconducting state of heavily overdoped Bi2Sr2CaCu2O8+δ detected by ultra-low temperature angle-resolved photoemission spectroscopy","authors":"Chaohui Yin, Qinghong Wang, Yuyang Xie, Yiwen Chen, Junhao Liu, Jiangang Yang, Junjie Jia, Xing Zhang, Wenkai Lv, Hongtao Yan, Hongtao Rong, Shenjin Zhang, Zhimin Wang, Nan Zong, Lijuan Liu, Rukang Li, Xiaoyang Wang, Fengfeng Zhang, Feng Yang, Qinjun Peng, Zuyan Xu, Guodong Liu, Hanqing Mao, Lin Zhao, Xintong Li, Xingjiang Zhou","doi":"10.1088/1674-1056/ad51f8","DOIUrl":"https://doi.org/10.1088/1674-1056/ad51f8","url":null,"abstract":"In high temperature cuprate superconductors, it was found that the superfluid density decreases with the increase of hole doping. One natural question is whether there exists normal fluid in the superconducting state in the overdoped region. In this paper, we have carried out high-resolution ultra-low temperature laser-based angle-resolved photoemission measurements on a heavily overdoped Bi2212 sample with a <italic toggle=\"yes\">T</italic>c of 48 K. We find that this heavily overdoped Bi2212 remains in the strong coupling regime with 2<italic toggle=\"yes\">Δ</italic>0/(<italic toggle=\"yes\">k</italic>B <italic toggle=\"yes\">T</italic>c) = 5.8. The single-particle scattering rate is very small along the nodal direction (∼5 meV) and increases as the momentum moves from the nodal to the antinodal regions. A hard superconducting gap opening is observed near the antinodal region with the spectral weight at the Fermi level fully suppressed to zero. The normal fluid is found to be negligibly small in the superconducting state of this heavily overdoped Bi2212. These results provide key information to understand the high <italic toggle=\"yes\">T</italic>c mechanism in the cuprate superconductors.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":"208 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141867208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Machine-learning-assisted efficient reconstruction of the quantum states generated from the Sagnac polarization-entangled photon source 机器学习辅助高效重建萨格纳克偏振纠缠光子源产生的量子态

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-01 DOI: 10.1088/1674-1056/ad51f7

Menghui Mao, Wei Zhou, Xinhui Li, Ran Yang, Yan-Xiao Gong, Shi-Ning Zhu

引用次数: 0

Cryogenic transmission electron microscopy on beam-sensitive materials and quantum science 低温透射电子显微镜观察光束敏感材料和量子科学

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-01 DOI: 10.1088/1674-1056/ad5af0

Gang Wang, Jun-Hao Lin

{"title":"Cryogenic transmission electron microscopy on beam-sensitive materials and quantum science","authors":"Gang Wang, Jun-Hao Lin","doi":"10.1088/1674-1056/ad5af0","DOIUrl":"https://doi.org/10.1088/1674-1056/ad5af0","url":null,"abstract":"Transmission electron microscopy (TEM) offers unparalleled atomic-resolution imaging of complex materials and heterogeneous structures. However, high-energy imaging electrons can induce structural damage, posing a challenge for electron-beam-sensitive materials. Cryogenic TEM (Cryo-TEM) has revolutionized structural biology, enabling the visualization of biomolecules in their near-native states at unprecedented detail. The low electron dose imaging and stable cryogenic environment in Cryo-TEM are now being harnessed for the investigation of electron-beam-sensitive materials and low-temperature quantum phenomena. Here, we present a systematic review of the interaction mechanisms between imaging electrons and atomic structures, illustrating the electron beam-induced damage and the mitigating role of Cryo-TEM. This review then explores the advancements in low-dose Cryo-TEM imaging for elucidating the structures of organic-based materials. Furthermore, we showcase the application of Cryo-TEM in the study of strongly correlated quantum materials, including the detection of charge order and novel topological spin textures. Finally, we discuss the future prospects of Cryo-TEM, emphasizing its transformative potential in unraveling the complexities of materials and phenomena across diverse scientific disciplines.","PeriodicalId":10253,"journal":{"name":"Chinese Physics B","volume":"779 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141884092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 family of quantum von Neumann architecture 量子冯-诺依曼体系结构系列

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-01 DOI: 10.1088/1674-1056/ad50be

Dong-Sheng Wang

引用次数: 0

Tunable energy spectrum betatron x-ray sources in a plasma wakefield 等离子体汪场中的可调谐能谱贝塔射线源

IF 1.7 4区物理与天体物理

Chinese Physics B Pub Date : 2024-07-01 DOI: 10.1088/1674-1056/ad4531

Chuan-Yi Xi, Yin-Ren Shou, Li-Qi Han, Abdughupur Ablimit, Xiao-Dan Liu, Yan-Ying Zhao, Jin-Qing Yu

引用次数: 0