Interlayer interactions in bilayer or multilayer electron systems have been studied extensively,and many exotic physical phenomena have been revealed.However,systematic investigations of the impact of interlayer inter...Interlayer interactions in bilayer or multilayer electron systems have been studied extensively,and many exotic physical phenomena have been revealed.However,systematic investigations of the impact of interlayer interactions on magnonic physics are very few.Here,we use a van derWaals(vdW)honeycomb heterostructure as a platform to investigate the modulation of magnon properties in honeycomb AA-and AB-stacking heterostructures with ferromagnetic and antiferromagnetic interlayer interactions,including topological phases and thermal Hall conductivity.Our results reveal that interlayer interactions play a crucial role in modulating the magnonic topology and Hall transport properties of magnetic heterostructures,with potential for experimental realization.展开更多
Controlling charge polarity in the semiconducting single-walled carbon nanotubes(CNTs) by substitutional doping is a difficult work due to their extremely strong C–C bonding. In this work, an inner doping strategy is...Controlling charge polarity in the semiconducting single-walled carbon nanotubes(CNTs) by substitutional doping is a difficult work due to their extremely strong C–C bonding. In this work, an inner doping strategy is explored by filling CNTs with one-dimensional(1D)-TM_(6)Te_(6) nanowires to form TM_(6)Te_(6)@CNT-(16,0) 1D van der Waals heterostructures(1D-vd WHs). The systematic first-principles studies on the electronic properties of 1D-vd WHs show that N-type doping CNTs can be formed by charge transfer from TM_(6)Te_(6) nanowires to CNTs, without introducing additional carrier scattering.Particularly, contribution from both T M(e.g., Sc and Y) and Te atoms strengthens the charge transfer. The outside CNTs further confine the dispersion of Te-p orbitals in nanowires that deforms the C-π states at the bottom of the conduction band to quasi sp^(3) hybridization. Our study provides an inner doping strategy that can effectively confine the charge polarity of CNTs and further broaden its applications in some novel nano-devices.展开更多
目的探讨VDW(德国)Bee Fill 2in1热牙胶垂直加压根管充填系统的护理配合。方法 200例急慢性牙髓炎及根尖周炎患者,应用VDW(德国)Bee Fill 2in1热牙胶根管充填系统进行垂直加压充填根管,对术前做好患者用物及器械、仪器准备及检查;术中...目的探讨VDW(德国)Bee Fill 2in1热牙胶垂直加压根管充填系统的护理配合。方法 200例急慢性牙髓炎及根尖周炎患者,应用VDW(德国)Bee Fill 2in1热牙胶根管充填系统进行垂直加压充填根管,对术前做好患者用物及器械、仪器准备及检查;术中协助根管预备及根管充填护理、术后做好设备保养和用物整理和患者健康指导。结果 188例X线摄片显示热牙胶根管充填均匀致密。12例中8例根管欠充、4例根管有气泡不密合,都接受再次充填后,患者治疗满意,术后无并发症。结论热牙胶根管充填比传统的侧方加压根管充填具有更好的根管封闭效果。护理人员掌握操作程序,密切有序迅速的配合医生治疗全程,提高了临床治愈率和满意度。四手操作在口腔护理配合中具有高效率、高质量的优点。展开更多
选用G.S.Soave对于Van Der Waals方程的两种修正式和H.Vidal混合模型,编写了计算单组分和混合物的热力参数和汽液平衡常数的电算程序,并对含氢系统和极性混合物进行了校核计算。结果表明,该程序对单组分、含氢系统和极性混合物的计算具...选用G.S.Soave对于Van Der Waals方程的两种修正式和H.Vidal混合模型,编写了计算单组分和混合物的热力参数和汽液平衡常数的电算程序,并对含氢系统和极性混合物进行了校核计算。结果表明,该程序对单组分、含氢系统和极性混合物的计算具有较满意的精度,能满足设计计算的需要,同样具有如同PR、GDSRK、BWSR等方法的简单、快速、输入数据较少等优点。本程序对多组分的分离计算,特别是液化石油气和液化天然气的轻烃回收系统具有实用意义。展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.12404051,12347156,12174157,12074150,and 12174158)the National Key Research and Development Program of China(Grant No.2022YFA1405200)+2 种基金the Natural Science Foundation of Jiangsu Province(Grant No.BK20230516)the Scientific Research Project of Jiangsu University(Grant No.550171001)support provided by the Deutsche Forschungsgemeinschaft(DFG,German Research Founda-tion)-TRR 288/2-422213477(project B06).
文摘Interlayer interactions in bilayer or multilayer electron systems have been studied extensively,and many exotic physical phenomena have been revealed.However,systematic investigations of the impact of interlayer interactions on magnonic physics are very few.Here,we use a van derWaals(vdW)honeycomb heterostructure as a platform to investigate the modulation of magnon properties in honeycomb AA-and AB-stacking heterostructures with ferromagnetic and antiferromagnetic interlayer interactions,including topological phases and thermal Hall conductivity.Our results reveal that interlayer interactions play a crucial role in modulating the magnonic topology and Hall transport properties of magnetic heterostructures,with potential for experimental realization.
基金Project supported by the National Natural Science Foundation of China (Grant No. 92477205)。
文摘Controlling charge polarity in the semiconducting single-walled carbon nanotubes(CNTs) by substitutional doping is a difficult work due to their extremely strong C–C bonding. In this work, an inner doping strategy is explored by filling CNTs with one-dimensional(1D)-TM_(6)Te_(6) nanowires to form TM_(6)Te_(6)@CNT-(16,0) 1D van der Waals heterostructures(1D-vd WHs). The systematic first-principles studies on the electronic properties of 1D-vd WHs show that N-type doping CNTs can be formed by charge transfer from TM_(6)Te_(6) nanowires to CNTs, without introducing additional carrier scattering.Particularly, contribution from both T M(e.g., Sc and Y) and Te atoms strengthens the charge transfer. The outside CNTs further confine the dispersion of Te-p orbitals in nanowires that deforms the C-π states at the bottom of the conduction band to quasi sp^(3) hybridization. Our study provides an inner doping strategy that can effectively confine the charge polarity of CNTs and further broaden its applications in some novel nano-devices.
文摘目的探讨VDW(德国)Bee Fill 2in1热牙胶垂直加压根管充填系统的护理配合。方法 200例急慢性牙髓炎及根尖周炎患者,应用VDW(德国)Bee Fill 2in1热牙胶根管充填系统进行垂直加压充填根管,对术前做好患者用物及器械、仪器准备及检查;术中协助根管预备及根管充填护理、术后做好设备保养和用物整理和患者健康指导。结果 188例X线摄片显示热牙胶根管充填均匀致密。12例中8例根管欠充、4例根管有气泡不密合,都接受再次充填后,患者治疗满意,术后无并发症。结论热牙胶根管充填比传统的侧方加压根管充填具有更好的根管封闭效果。护理人员掌握操作程序,密切有序迅速的配合医生治疗全程,提高了临床治愈率和满意度。四手操作在口腔护理配合中具有高效率、高质量的优点。
文摘选用G.S.Soave对于Van Der Waals方程的两种修正式和H.Vidal混合模型,编写了计算单组分和混合物的热力参数和汽液平衡常数的电算程序,并对含氢系统和极性混合物进行了校核计算。结果表明,该程序对单组分、含氢系统和极性混合物的计算具有较满意的精度,能满足设计计算的需要,同样具有如同PR、GDSRK、BWSR等方法的简单、快速、输入数据较少等优点。本程序对多组分的分离计算,特别是液化石油气和液化天然气的轻烃回收系统具有实用意义。
