搜索结果: 1-15 共查到“物理学 Ba”相关记录33条 . 查询时间(0.078 秒)
采用氧化固相法制备了(1-x)(Bi0.5Na0.5)TiO3-xBa(Ti0.95Zr0.05)O3(BNT-BZT)陶瓷,其中掺入量x的值分别为0,0.04,0.05,0.06,0.07.研究了BNT-BZT体系陶瓷的准同型相界以及陶瓷材料的微观结构和性能之间的关系,并探讨了陶瓷的介电性能和铁电等性能.通过探究Ba(Ti,Zr)O3(BZT)掺杂量对BNT各性能的影响得出了当掺杂量x=0.05...
北京师范大学化学学院吴立明与陈玲课题组报道首例非公度调制结构红外非线性光学材料Re2SnS5(Re=Ba, Sr)：兼具强二阶倍频响应和高激光损伤阈值（图）
北京师范大学化学学院 吴立明 陈玲 非公度 调制结构 红外非线性光学材料 Re2SnS5 强二阶倍频响应 高激光 损伤阈值
2020/4/17
红外非线性光学材料（NLO）在长距离激光通讯、红外对抗及光电设备等领域具有非常重要的应用价值。现有的红外非线性光学商用材料AgGaS2(AGS), AgGaSe2和ZnGeP2虽然具有非常大的非线性系数，但其存在的缺点如：带隙较小，激光损伤阈值低，不能实现相位匹配等限制了这些材料的应用。因此，同时提升红外非线性光学材料的激光损伤阈值和非线性光学性质是该领域的一个难点和热点，具有重要的科学意义和应用...
由于在磁性材料体系中缺失时间反演对称性，导致nodalchain被破坏，所以nodalchain通常存在于非磁材料中。但是，磁性材料EuAuBi是与常规磁性材料不同。本工作以第一性原理计算为研究方法，预言了在不考虑自旋轨道相互作用时，磁性材料EuAuBi体系为新型拓扑nodalchain半金属；当考虑自旋轨道耦合时，EuAuBi会退化为外尔半金属。对于非磁材料BaAuBi来说，在不考虑自旋轨道相互...
基于BA模型高团聚性网络构造
复杂网络 团簇性 加边 无标度
2012/11/26
介绍了复杂网络，指出BA模型在刻画真实网络上的不足，即团簇系数不高.在BA模型的基础上引入加边机制，提出了一种改进模型.数值模拟结果表明：在改进模型中，网络在保持BA模型无标度性质的同时，具有较高的团簇系数；网络的团簇系数C随改进模型中加边概率p的增大而增大，当p=1时，网络的团簇系数比同等规模的BA模型提高了约100倍.
A combined high-pressure experimental and theoretical study of the electronic band-structure of scheelite-type AWO4 (A = Ca, Sr, Ba, Pb) compounds
high-pressure experimental theoretical study the electronic band-structure scheelite-type AWO4
2011/8/17
Abstract: The optical-absorption edge of single crystals of CaWO4, SrWO4, BaWO4, and PbWO4 has been measured under high pressure up to ~20 GPa at room temperature. From the measurements we have obtain...
Millimeter-wave study of London penetration depth temperature dependence in Ba(Fe0.926Co0.074)2As2 single crystal
Instrumentation and Detectors depth, temperature dependence.
2011/9/29
In-plane surface Ka-band microwave impedance of optimally doped single crystals of the Fe-based superconductor Ba(Fe0.926Co0.074)2As2 (Tc= 22.8K) was measured. Sensitive sapphire disk quasi-optical re...
Ba原子是光频标的候选者之一，对其进行有效的激光冷却与囚禁需要相关能级的寿命和跃迁几率的信息。Ba原子激发态6s6p 3P1能级在激光冷却实验中很重要，通过Hanle效应实验测量了这一能级的寿命和自发辐射率，从理论和实验上研究了探测激光有限线宽和光强对Ba原子基态6s2 1S0与激发态6s6p 3P1之间跃迁（波长791 nm）的Hanle效应的荧光信号的影响。在考虑了激光线宽和光强因素后所得到的...
Antiferromagnetic ordering in the absence of a structural distortion in Ba(Fe{1-x}Mn{x})2As2
Stripe Antiferromagnetic structural distortio
2010/11/22
Neutron and x-ray diffraction studies of Ba(Fe1−xMnx)2As2 for low doping concentrations (x 6 0.176)reveal that at a critical concentration, 0.102 < x < 0.118, the tetragonal-to orthorhombic tran...
Commensurate antiferromagnetic ordering in Ba(Fe{1-x}Co{x})2As2 determined by x-ray resonant magnetic scattering at the Fe K-edge
Commensurate antiferromagnetic x-ray resonant magnetic Fe K-edge
2010/11/22
We describe x-ray resonant magnetic diffraction measurements at the FeK-edge of both the parent BaFe2As2 and superconducting Ba(Fe0.953Co0.047)2As2 compounds. From these high-resolution measurements w...
Electronic States and Superconducting Transition Temperature based on the Tomonaga-Luttinger liquid in Pr$_{2}$Ba$_{4}$Cu$_{7}$O$_{15-\delta}$
Pr2Ba4Cu7O15− first-principles calculations CuO double chain superconductivity
2010/11/17
An NQR experiment revealed superconductivity of Pr2Ba4Cu7O15− (Pr247) to be realized
on CuO double chain layers and suggests possibility of novel one-dimensional(1D) superconduc-
tivity. To c...
Influenced of Fe buffer thickness on the crystalline quality and the transport properties of Fe/Ba(Fe1-xCox)2As2 bilayers
buffer thickness crystalline quality transport properties
2010/11/17
The implementation of an Fe buffer layer is a promising way to obtain epitaxial growth of Co-doped BaFe2As2 (Ba-122). However, the crystalline quality and the superconducting properties of Co-doped Ba...
Symmetry breaking orbital anisotropy on detwinned Ba(Fe1-xCox)2As2 above the spin density wave transition
Symmetry breaking orbital anisotropy detwinned Ba
2010/11/17
Nematicity, defined as broken rotational symmetry, has recently been observed in the competing phases in proximity to the superconducting phase in the high TC cuprates (1-2). Similarly, the new iron-b...
Normal state resistivity of Ba$_{1-x}$K$_x$Fe$_2$As$_2$: evidence for multiband strong-coupling behavior
Normal state resistivity multiband strong-coupling behavior
2010/11/19
We present theoretical analysis of the normal state resistivity in multiband superconductors in the framework of Eliashberg theory. The results are compared with measurements of the temperature depend...
Calorimetric Evidence for Nodes in the Overdoped Ba(Fe$_{0.9}$Co$_{0.1}$)$_{2}$As$_{2}$
Calorimetric Evidence
2010/11/25
We present low-temperature specific heat of the electron-doped Ba(Fe0.9Co0.1)2As2, which does
not show any indication of an upturn down to 400 mK, the lowest measuring temperature. The
lack of a Sch...
Critical-doping universality for cuprate superconductors: Oxygen nuclear-magnetic-resonance investigation of Ca(x)La(1-x)Ba(1.75-x)La(0.25+x)Cu(3)O(y)
cuprate superconductors Oxygen nuclear-magnetic-resonance investigation
2010/11/18
The critical doping levels in cuprates, where the ground state changes its nature (from an an-
tiferromagnet to a spin glass to superconductor to metal), are not universal. We investigate the origin ...