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Absence of BCS–BEC crossover in FeSe0.45Te0.55 superconductor

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Chinese Physics B 2024年第7期33卷 89-96页

作者：贾俊杰谷亚东殷超辉束英杰陈逸雯史聚民张杏陈浩苗泰民任晓琳梁波朱文培蔡能张丰丰张申金杨峰王志敏彭钦军许祖彦毛寒青刘国东任治安赵林周兴江 National Laboratory for Superconductivity Beijing National Laboratory for Condensed Matter PhysicsInstitute of Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Technical Institute of Physics and Chemistry Chinese Academy of Sciences Songshan Lake Materials Laboratory

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 FeSe0.45Te0.55superconductor to address the issue. By employing different polarization geometries, we have resolved and isolated the dyz band and the topological surface band, making it possible to study their superconducting behaviors separately. The dyz 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 dyz 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.

关键词： FeSe_(0.45)Te_(0.55) ARPES electronic structure superconducting gap BCS-BEC crossover

Successful infrainguinal revascularization with autologousvein for inadvertent stripping of superficial femoral artery:a case report

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Frontiers of Medicine 2009年第3期3卷 375-378页

作者： yin XIA Dan SHANG Qin LI Wenyi LI hanqing WU Guofu HU Chao YANG Yiqing LI Bi JIN Department of Vascular Surgery Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China

A referral patient who had previously under-gone varicose vein surgery was admitted as an emergency *** admission,the patient complained of intolerable pain,paralysis and paresthesia of the affected limb,which was characterized by acute arterial ischemia *** Doppler of the artery of the affected limb indicated that no bloodﬂow signal existed in the superﬁcial femoral *** exploratory operation,we found that the right superﬁcial femoral artery instead of the great saphenous vein of the affected limb had been stripped and ***,the intact right great saphenous vein was taken for auto-transplantation by inverse end-to-end anastomosis to the proximal and distal residual superﬁcial femoral artery,which resulted in gradual *** for ischemic reperfusion injury,no other post-operative complications occurred after a 10 month follow-up;however,the long-term curative effect needs further *** we report our treatment experience.

关键词： revascularization saphenous vein end-to-end anastomosis stripping

Molecular Identification and Genetic Characterization of Public Health Threatening Ticks — Chongming Island, China, 2021–2022

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China CDC weekly 2023年第37期5卷 815-821,I0001-I0008页

作者： Siwei Fei hanqing Zhao Jingxian yin Li Wang Zhishan Sun Wenge Zhang Yan Zhang Ke Dong Shan Lyu Xiaokui Guo Xiao-nong Zhou Kokouvi Kassegne School of Global Health Chinese Centre for Tropical Diseases ResearchShanghai Jiao Tong University School of MedicineShanghaiChina Shanghai Chongming Centre for Disease Control and Prevention ShanghaiChina National Health Commission of the People’s Republic of China(NHC)Key Laboratory of Parasite and Vector Biology National Institute of Parasitic Diseases at Chinese Centre for Disease Control and PreventionChinese Centre for Tropical Diseases ResearchWHO Collaborating Centre for Tropical DiseasesNational Centre for International Research on Tropical Diseases of the Chinese Ministry of Science and TechnologyShanghaiChina

Summary What is already known about this topic?Although ticks and tick-borne diseases are prevalent throughout China,there remains a knowledge gap regarding their biology and potential risk of distribution to human and animal populations on Chongming *** island,being China’s third largest and a crucial component in the ecological preservation of the Yangtze Delta region,has yet to be comprehensively studied in this context.

关键词： Island Yangtze Chong

Controllable preparation of ultrathin 2D BiOBr crystals for high-performance ultraviolet photodetector

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Science China Materials 2021年第1期64卷 189-197页

作者： Pengfei Liu Lei yin Liping Feng Yu Sun hanqing Sun Wenqi Xiong Congxin Xia Zhenxing Wang Zhengtang Liu State Key Lab of Solidification Processing College of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an710072China Center for Excellence in Nanoscience CAS Key Laboratory of Nanosystem and Hierarchical FabricationNational Center for Nanoscience and TechnologyBeijing100190China College of Physics and Material Science Henan Normal UniversityXinxiang453007China

Ternary layered compound materials(bismuth oxyhalides and metal phosphorus trichalcogenides)stand out in electronic and optoelectronic fields due to their interesting physical ***,few studies focus on the preparation of high-quality two-dimensional(2D)BiOBr crystals with a typical layered structure,let alone their optoelectronic ***,for the first time,high-quality 2D BiOBr crystals with ultrathin thicknesses(less than 10 nm)and large domain sizes(~100μm)were efficiently prepared via a modified space-confined chemical vapor deposition(SCCVD)*** is demonstrated that a moderate amount of H2O molecules in the SCCVD system greatly promote the formation of high-quality 2D BiOBr crystals because of the strong polarity of H2O *** addition,a linear relationship between the thickness of BiOBr nanosheets and Raman shift of A1g(1)mode was *** theoretical calculations were carried out to verify the experimental ***,the BiOBr-based photodetector was fabricated,exhibiting excellent performances with a responsivity of 12.4 A W-1 and a detectivity of 1.6×1013 Jones at 365 *** study paves the way for controllable preparation of high-quality 2D BiOBr crystals and implies intriguing opportunities of them in optoelectronic applications.

关键词： 2D BiOBr crystals SCCVD method H2O molecule interlayer interaction ultraviolet photodetector

Negligible normal fluid in superconducting state of heavily overdoped Bi_(2)Sr_(2)CaCu_(2)O_(8+δ) detected by ultra-low temperature angle-resolved photoemission spectroscopy

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Chinese Physics B 2024年第7期33卷 562-567页

作者：殷超辉汪清泓解于洋陈逸雯刘俊豪杨鉴刚贾俊杰张杏吕文凯闫宏涛戎洪涛张申金王志敏宗楠刘丽娟李如康王晓洋张丰丰杨峰彭钦军许祖彦刘国东毛寒青赵林李昕彤周兴江 National Laboratory for Superconductivity Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China

In high temperature cuprate superconductors,it was found that the superfluid density decreases with the increase of hole *** natural question is whether there exists normal fluid in the superconducting state in the overdoped *** 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 T_(c) of 48 *** find that this heavily overdoped Bi2212 remains in the strong coupling regime with 2Δ_(0)/(k_(B)T_(c))=*** 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 *** normal fluid is found to be negligibly small in the superconducting state of this heavily overdoped *** results provide key information to understand the high T_(c) mechanism in the cuprate superconductors.

关键词： cuprate superconductor angle-resolved photoemission spectroscopy electronic structure

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透明细胞软骨肉瘤术后皮肤和内脏多发性转移一例

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中国麻风皮肤病杂志 2024年第4期40卷 289-291页

作者：宋寒清程寅洪心怡王秀琴郭泽李卉李莉王培光安徽医科大学第一附属医院皮肤性病科安徽合肥230022 安徽医科大学第一附属医院病理科安徽合肥230022

透明细胞软骨肉瘤是一种生长缓慢、低度恶性的肿瘤,皮肤转移罕见,本文报道1例中年女性患者,左臀部丘疹及全身多发结节伴瘙痒5年余。左臀部丘疹及右臀部结节的组织病理及免疫组化结果均符合转移的透明细胞软骨肉瘤。完善PET-CT提示内脏... 详细信息

透明细胞软骨肉瘤是一种生长缓慢、低度恶性的肿瘤,皮肤转移罕见,本文报道1例中年女性患者,左臀部丘疹及全身多发结节伴瘙痒5年余。左臀部丘疹及右臀部结节的组织病理及免疫组化结果均符合转移的透明细胞软骨肉瘤。完善PET-CT提示内脏多发性转移。患者接受化疗联合靶向药物治疗8个疗程后,病情明显好转,目前仍在随访中。

关键词：透明细胞软骨肉瘤皮肤转移组织病理免疫组化

改性MPSA树脂的合成及在耐高温胶粘剂制备中的应用

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粘接 2024年第5期51卷 17-20页

作者：孙星星魏运召赵汉清尹杰王冠付刚赵玉宇吴健伟黑龙江省科学院石油化学研究院黑龙江哈尔滨150040

以间二乙炔基苯和甲基苯基二氯硅烷采用格氏试剂法合成了甲基苯基含硅芳炔(MPSA)树脂,进行了红外(FT-IR)、核磁(^(1)H-NMR)、热性能和流变特性分析表征,通过MPSA与聚酰亚胺树脂共混制备胶粘剂,以差示扫描量热法(DSC)、热失重分析(TGA)... 详细信息

以间二乙炔基苯和甲基苯基二氯硅烷采用格氏试剂法合成了甲基苯基含硅芳炔(MPSA)树脂,进行了红外(FT-IR)、核磁(^(1)H-NMR)、热性能和流变特性分析表征,通过MPSA与聚酰亚胺树脂共混制备胶粘剂,以差示扫描量热法(DSC)、热失重分析(TGA)研究胶粘剂的固化性能、耐热性能,测试了胶粘剂室温和高温剪切强度。结果表明,制备的MPSA树脂显示出优异的耐热性和加工性,室温到210℃黏度在10Pa·s以下,5%热失重温度(T_(d5))为583℃,800℃残碳率(Y_(r800))为88%。聚酰亚胺树脂改性的MPSA胶粘剂显示出较高的高温粘接性能和良好的高温热稳定性,T_(d5)在564~573℃,Y_(r800)在80%~85%,其中AtPI:MPSA=5:5胶粘剂的室温和450℃剪切强度分别达到10.7MPa和7.5MPa。

关键词：含硅芳炔树脂聚酰亚胺树脂改性胶粘剂

Two-stage degradation and novel functional endothelium characteristics of a 3-D printed bioresorbable scaffold

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Bioactive Materials 2022年第4期7卷 378-396页

作者： Tieying yin Ruolin Du Yang Wang Junyang Huang Shuang Ge Yuhua Huang Youhua Tan Qing Liu Zhong Chen hanqing Feng Jie Du Yazhou Wang Guixue Wang Key Laboratory for Biorheological Science and Technology of Ministry of Education State and Local Joint Engineering Laboratory for Vascular ImplantsBioengineering College of Chongqing UniversityChongqing400030China Department of Biomedical Engineering The Hong Kong Polytechnic UniversityHong Kong SARChina Beijing Advanced Medical Technologies Inc. Beijing102609China Beijing Anzhen Hospital of Capital Medical University Beijing100029China Beijing Institute of Heart Lungand Blood Vessel DiseasesBeijing Anzhen HospitalCapital Medical University2 Anzhen AveBeijing10029China School of Medicine Chongqing UniversityChongqing400044China

Bioresorbable scaffolds have emerged as a new generation of vascular implants for the treatment of atherosclerosis,and designed to provide a temporary scaffold that is subsequently absorbed by blood vessels over ***,there is insufficient data on the biological and mechanical responses of blood vessels accompanied by bioresorbable scaffolds(BRS)***,it is necessary to investigate the inflexion point of degradation,the response of blood vessels,and the pathophysiological process of vascular,as results of such studies will be of great value for the design of next generation of *** this study,abdominal aortas of SD rats were received 3-D printed poly-l-actide vascular scaffolds(PLS)for various durations up to 12 *** response of PLS implanted aorta went through two distinct processes:(1)the neointima with desirable barrier function was obtained in 1 month,accompanied with slow degradation,inflammation,and intimal hyperplasia;(2)significant degradation occurred from 6 months,accompanied with decreasing inflammation and intimal hyperplasia,while the extracellular matrix recovered to normal vessels which indicate the positive *** in vivo results indicate that 6 months is a key turning ***“two-stage degradation and vascular characteristics”is proposed to elucidate the long-term effects of PLS on vascular repair and demonstrated the potential of PLS in promoting endothelium function and positive remodeling,which highlights the benefits of PLS and shed some light in the future researches,such as drug combination coatings design.

关键词： Intravascular stents 3-D printing Bioresorbable scaffold Degradation behavior Functional endothelium

Rechargeable Metasurfaces for Dynamic Color Display Based on a Compositional and Mechanical Dual-Altered Mechanism

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Research 2023年第1期2022卷 367-377页

作者： Le Yang Xiaorong Hong Jiafang Li Chang-yin Ji Yu Han Shanshan Chen hanqing Jiang Wei-Li Song Hao-Sen Chen Daining Fang Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures Institute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing 100081China Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement(Ministry of Education) Beijing Key Lab of Nanophotonics e Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of TechnologyBeijing 100081China School of Engineering Westlake UniversityHangzhou 310024China

Dynamic color display can be realized by tunable optical metasurfaces based on the compositional or structural ***,it is still a challenge to realize the efficient modulation by a single-field ***,we report a novel compositional and mechanical dual-altered rechargeable metasurface for reversible and broadband optical reconfiguration in both visible and near-infrared wavelength *** employing a simple fabrication and integration strategy,the continuous optical reconfiguration is manipulated through an electro-chemo-mechanical coupled process in a lithium ion battery,where lithiation and delithiation processes occur dynamically under a low electric voltage(<1.5 V).By controlling the phase transformation from Si to Li,Si,both structural morphology and optical scattering could be rapidly and dramatically tailored within 30s,exhibiting high-contrast colorization and decolorization in a large-area nanofilm and showing long cyclic *** wide-angle reconfiguration of high-resolution structural colors in bowtie metasurfaces is demonstrated from anomalous *** results provide a multifield mechanism for reconfigurable photonic devices,and the new platform can be introduced to the multidimensional information encryption and storage.

关键词： scattering figuration Dynamic