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Xi?ChenEmail author Pei-Liang?Zhao Xiao-Jing?Lu 《The European Physical Journal B - Condensed Matter and Complex Systems》2013,86(5):223
Electronic analogy of Goos-Hänchen shift has been well established and investigated in various graphene-based nanostructures, including p-n interface, single and double barriers. In this paper, we have studied the giant negative and positive lateral shifts of the transmitted electron beam through graphene superlattices. It is found that the lateral shifts, depending on the location of new Dirac point, can be negative as well as positive near the band edges of zero-k? (non-Bragg) gap. We have also achieved the enhanced opposite shifts in the graphene superlattice with defect layer, since such structure possesses the defect mode inside the zero-k? gap. The modulations of negative and positive lateral shifts by incidence angles, width and potential height of defect layer may lead to potential applications in the graphene-based electron wave devices. 相似文献
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含1,2,4-三唑杂环的新型Strobilurins衍生物的合成及杀菌活性 总被引:4,自引:0,他引:4
为了寻找新的高活性先导化合物, 设计合成了14个未见文献报道的Strobilurins类衍生物, 结构经MS, 1H NMR, 元素分析确认. 并用X-ray单晶衍射测定了(E)-3-甲氧基-2-[(5-甲基-4-邻溴代苯亚甲基亚胺基-1,2,4-三唑)-3-硫亚甲基]-苯基丙烯酸甲酯(5i)的晶体结构, 证实了分子中的两个C=C均为E-式构型. 初步生物活性测试结果表明, 在实验浓度下部分化合物具有一定的杀菌活性. 相似文献
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Feng-Jiao Luo Yue-Kun Heng Zhi-Min Wang Pei-Liang Wang Zhong-Hua Qin Mei-Hang Xu Dong-Hao Liao Hai-Qiong Zhang Yong-Bo Huang Xiang-Cui Lei Sen Qian Shu-Lin Liu Yuan-Bo Chen Yi-Fang Wang 《中国物理C(英文版)》2016,40(9):096002-096002
The quality of PMT signals is crucial for large-size and high-precision neutrino experiments, but most of these experiments are affected by the overshoot of PMT signals from the positive HV-single cable scheme. Overshoot affects the trigger, dead time and charge measurement from a detector. For the JUNO prototype detector, we have performed a detailed study and calculation on PMT signal overshoot to control the ratio of overshoot to signal amplitude to ~1%, with no effect on other PMT parameters. 相似文献
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The D*D1(2420) and DD'*(2600) interactions are studied in a one-boson-exchange model. Isovector bound state solutions with spin parity JP=1+ are found from the D*D1(2420) interaction, which may be related to the observed charged charmonium-like state Z(4430). There is no bound state solution found from the DD'*(2600) interaction. 相似文献
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Using Yasumoto and ?ishi's energy flux method, a generalized analytical formulation for analyzing the Goos-H?nchen (GH) shift in frustrated total internal reflection is provided, from which the GH shift given by Artman's stationary phase method is shown to equal the GH calculated by Renard's conventional energy flux method plus a self-interference shift. The self-interference shift, originating from the interference between the incident and reflected beams, sheds light on the asymptotic behavior of the GH shift in such optical tunneling process in term of energy flux. 相似文献
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The title compound,(Z)-methyl-3-methoxy-2-{2-[(4-(E-3-p-tolylacryloyl)phenoxy)-methyl]phenyl}acrylate,was synthesized and determined by X-ray single-crystal diffraction. The crystal belongs to the triclinic system,space group P1 with a = 8.0157(8),b = 12.5748(13),c = 13.3768(14) ,α = 64.770(2),β = 75.720 (2),γ = 89.784(2)°,μ = 0.085 mm-1,Mr = 442.49,V = 1174.1(2) 3,Z = 2,Dc = 1.252 g/cm3,F(000) = 468,T = 294(2) K,R = 0.0603 and wR = 0.1498 for 2644 observed reflections with I 2σ(I). X-ray diffraction analysis reveals that the single crystal contains strong non-classical hydrogen bonds. The preliminary bioassay showed that the title compound exhibits inhibitory activity against the Pseudoperoniospora cubensis and Rhizoctonia solani at the test concentration of 200 mg/L. 相似文献
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The crystal structure of the title compound 2-ethoxycarbonylmethyl-8-chloro-3a,4-dihydro-3a-methyl-chromeno[4,3-c]pyrazol-3(2H)-one(C15H15ClN2O4,Mr = 322.74) has been prepared and determined by single-crystal X-ray diffraction.The crystal is of orthorhombic,space group Pccn with a = 16.7246(10),b = 19.6626(12),c = 9.3013(6) ,V = 3058.7(3) 3,Z = 8,Dc = 1.402 g/cm3,μ = 0.269 mm-1,F(000) = 1344,the final R = 0.0506 and wR = 0.1464 for 2568 reflections with I 2σ(I).In addition,disordered C(14) and C(15) atoms exist in the crystal structure. 相似文献