共查询到19条相似文献，搜索用时 354 毫秒
1.
SHI Yao ming CHEN Hang de XU Shi yue 《上海大学学报(英文版)》1999,3(3):203-207
１ Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｑｕａｎｔｕｍｃｏｈｅｒｅｎｔｔｒａｎｓｐｏｒｔｉｎｍｅｓｏｓｃｏｐｉｃｓｙｓｔｅｍｈａｓｂｅｅｎｉｎｖｅｓｔｉｇａｔｅｄｅｘｔｅｎｓｉｖｅｌｙｉｎｔｈｅｐａｓｔｄｅｃａｄｅ．Ｍｏｔｉｖａｔｅｄｂｙｓｏｍｅｒｅｃｅｎｔｅｘｐｅｒｉｍｅｎｔｓ,ｍａｄｅｂｙＹａｃｏｂｙｅｔａｌ．［１］ａｎｄＢｕｋｓｅｔａｌ．［２］,ｐｈａｓｅｓｅｎｓｉｔｉｖｅｔｒａｎｓｐｒｏｔｉｎａｎＡｈａｒｏｎｏｖｂｏｈｍ（ＡＢ）ｒｉｎｇｗｉｔｈａｑｕａｎｔｕｍｄｏｔ（ＱＤ）ｅｍｂｅｄｄｅｄ… 相似文献
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LI Gen guo 《上海大学学报(英文版)》1999,3(4):263-269
１ Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｃｏｎｓｉｄｅｒｔｈｅｍｏｄｅｌｘ ¨＋ｘ（１－ｘ）（ｘ－ａ）＝０,（１）ｗｈｅｒｅａｉｓａｃｏｎｓｔａｎｔ．Ａｓａ＝－１,Ｅｑ．（１）ｒｅｄｕｃｅｓｔｏｔｈｅＤｕｆｆｉｎｇｅｑｕａｔｉｏｎｆｏｒｔｈｅｓｙｓｔｅｍｏｆｓｏｆｔｓｐｒｉｎｇｗｉｔｈｏｕｔｄａｍｐｉｎｇｘ ¨＋ｘ－ｘ３＝０．（２） ＴｈｅＤｕｆｆｉｎｇｓｙｓｔｅｍｈａｓｂｒｏａｄｅｎｇｉｎｅｅｒｉｎｇｂａｃｋｇｒｏｕｎｄ．Ｔｈｅｒｅａｒｅｐａｐｅｒｓ［１～４］ｒｅｌａｔｅｄｔｏｔｈｅｄｙｎａｍｉｃ… 相似文献
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LU Jing tang DONG Ming SONG Han bin FANG Zhen he 《上海大学学报(英文版)》1999,3(4):345-347
１ Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｆｒｏｍｌａｔｅ１９８０ｓｔｏ１９９０ｓ,ＡＴ＆ＴＢｅｌｌＬａｂｏｒａｔｏｒｙｒｅｐｏｒｔｅｄｓｕｃｃｅｓｓｉｖｅｌｙｓｏｍｅｒｅｓｅａｒｃｈｒｅｓｕｌｔｓｏｎｇｅａｒｔｙｐｅｍｉｃｒｏｇｒｉｐｐｅｒａｎｄｏｔｈｅｒｓｉｍｐｌｅｍｉｃｒｏｍｅｃｈａｎｉｓｍ［１］．Ｉｎｔｈｅｐｕｂｌｉｃａｔｉｏｎｓ,ｓｅｖｅｒａｌｐｈｏｔｏｇｒａｐｈｓｏｆｍｉｃｒｏｍｅｃｈａｎｉｓｍｉｎｏｒｉｇｉｎａｌｐｏｓｉｔｉｏｎｗｅｒｅｓｈｏｗｎ,ｂｕｔｎｏｄｅｔａｉｌｄｅｓｃｒｉｐｔｉ… 相似文献
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１ Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｓｉｎｇｕｌａｒｌｙｐｅｒｔｕｒｂｅｄｄｉｆｆｅｒｅｎｔｉａｌｅｑｕａｔｉｏｎｓｗｉｔｈｔｕｒｎｉｎｇｐｏｉｎｔｓａｒｅｖｅｒｙｉｍｐｏｒｔａｎｔｆｏｒｍａｔｈｅｍａｔｉｃｉａｎｓａｎｄｐｈｙｓｉｃｉｓｔｓｓｉｎｃｅｔｈｅｓｅｐｒｏｂｌｅｍｓｅｘｉｓｔｗｉｄｅｌｙｉｎｍａｎｙｐｒｏｂｌｅｍｓｏｆｐｈｙｓｉｃｓ．ＴｈｅｐｒｏｂｌｅｍｓｗｉｔｈｔｕｒｎｉｎｇｐｏｉｎｔｓｗｅｒｅｓｔｕｄｉｅｄｂｙＷｅｎｔｚａｌ,Ｋｒａｍｅｒｓ,Ｂｕｌｌｏｕｎｉｎ［１］,Ｌａｎｇｅｒ,Ａ… 相似文献
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１ Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｔｈｅｓｍａｌｌｓｉｚｅ（ｄｉａｍｅｔｅｒ＜１００ｎｍ）ｏｆｕｌｔｒａｆｉｎｅｐａｒｔｉｃｌｅｓｅｎｄｏｗｓｔｈｅｍｗｉｔｈｕｎｕｓｕａｌｓｔｒｕｃｔｕｒｅ,ｅｌｅｃｔｒｏｎｉｃ,ｏｐｔｉｃａｌ,ｍａｇｎｅｔｉｃａｎｄｃｈｅｍｉｃａｌｐｒｏｐｅｒｔｉｅｓ,ｌｅａｄｉｎｇｔｏｍａｎｙｉｍｐｏｒｔａｎｔａｐｐｌｉｃａｔｉｏｎｓｓｕｃｈａｓｃａｔａｌｙｓｔｓ,ｅｌｅｃｔｒｏｏｐｔｉｃａｌｄｅｖｉｃｅｓａｎｄｆｉｎｅｃｅｒａｍｉｃｓ［１］．Ａｓｏｎｅｏｆｓｐｅｃｉａｌｆ… 相似文献
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Electrical Conductivity and Corrosion Resistanceof ZnFe_2O_4Based Materials Used as Inert Anodefor Aluminum Electrolysis 总被引：1，自引：0，他引：1
１ Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｉｎ１８８９,Ｃ．Ｍ．Ｈａｌｌａｐｐｌｉｅｄｔｈｅｆｉｒｓｔｐａｔｅｎｔｏｎｉｎｅｒｔａｎｏｄｅｆｏｒａｌｕｍｉｎｕｍｅｌｅｃｔｒｏｌｙｓｉｓ［１］．Ｆｒｏｍｔｈｅｎｏｎ,ｔｈｅｒｅｈａｖｅｂｅｅｎａｑｕｉｔｅｎｕｍｂｅｒｏｆｐａｔｅｎｔｓａｎｄｉｎｖｅｓｔｉｇａｔｉｏｎｓｏｎｔｈｉｓｓｕｂｊｅｃｔ,ｂｕｔｎｏｎｅｏｆｔｈｅｍｈａｓｂｅｅｎｐｕｔｉｎｔｏｐｒａｃｔｉｃｅ．ＢｉｌｌｅｈａｎｇａｎｄＯｙｅｈａｄｓｕｍｍａｒｉｚｅｄｔｈｅｒｅｓｅａｒｃｈｗｏｒｋｓｂｅｆ… 相似文献
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HOU Wei dong MO Yu long 《上海大学学报(英文版)》1999,(4)
１ Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｔｈｅｐｕｂｌｉｃｓｗｉｔｃｈｅｄｔｅｌｅｐｈｏｎｅｎｅｔｗｏｒｋ（ＰＳＴＮ）ａｎｄｉｔｓｂｒｏａｄｃｏｖｅｒａｇｅｐｒｏｍｏｔｅｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆｖａｒｉｏｕｓｖｉｓｕａｌｃｏｍｍｕｎｉｃａｔｉｏｎｓｓｅｒｖｉｃｅｓｏｖｅｒＰＳＴＮ［１］．ＴｈｅａｌｌｏｗｅｄｂｉｔｒａｔｅｏｖｅｒＰＳＴＮｗｉｔｈｖｏｉｃｅｂａｎｄｍｏｄｅｍｉｓｓｔｉｌｌｌｉｍｉｔｅｄｔｏｌｏｗｅｒｔｈａｎ６４ｋｂｉｔ／ｓ,ｗｈｉｃｈｐｒｅｓｅｎｔｓａｇｒｅａｔｃｈａｌｌｅｎｇｅ… 相似文献
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Hui Xu Ph. D. Kai-yuan He Shu-li He Li-zhi Cheng Yuan-da Dong Xue-shan Xiao 《上海大学学报(英文版)》1999,3(4):318-320
１ Ｉｎｔｒｏｄｕｃｔｉｏｎ ＦｅｒｉｃｈｎａｎｏｃｒｙｓｔａｌｌｉｎｅＦｅＺｒＢａｌｌｏｙｓｓｉｍｕｌｔａｎｅｏｕｓｌｙｓｈｏｗｇｏｏｄｓｏｆｔｍａｇｎｅｔｉｃｐｒｏｐｅｒｔｉｅｓａｎｄｌａｒｇｅｓａｔｕｒａｔｉｏｎｍａｇｎｅｔｉｚａｔｉｏｎ［１,２］．Ｔｈｅｒｅａｒｅｍａｉｎｌｙｔｗｏｐｈａｓｅｓｉｎｔｈｅａｌｌｏｙｓｗｉｔｈｏｐｔｉｍｕｍｍａｇｎｅｔｉｃｐｒｏｐｅｒｔｉｅｓ：ａｎａｎｏｃｒｙｓｔａｌｌｉｎｅαＦｅｐｈａｓｅａｎｄａｎｉｎｔｅｒｇｒａｎｕｌａｒａｍｏｒｐｈｏｕｓｐｈａｓ… 相似文献
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Liu Yongcai 《上海大学学报(英文版)》1998,2(2):144-147
ＴｈｅｎｅｕｒａｌｎｅｔｗｏｒｋｓｆｏｒＮＯＴ,ＡＮＤ,ＯＲ,ＮＡＮＤ,ＮＯＲ,ＸＯＲａｎｄＸＮＯＲｇａｔｅｓｗｅｒｅｐｒｅｓｅｎｔｅｄｉｎ［１］ａｎｄ［４］．ＴｈｅｌｏｇｉｃｆｕｎｃｔｉｏｎｏｆａｎｙｇａｔｅｃａｎｂｅｄｅｓｃｒｉｂｅｄｕｓｉｎｇＢ... 相似文献
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1 Introduction Since some experi ments made by Yacoby,et al.[1],and Schuster ,et al.[2],that first measured electrontransmission phase through a quantum dot ( QD) ,phase sensitive transports in open mesoscopic ringwith a QD have been extensively investiga… 相似文献
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Aharonov-Casher oscillasions of transmission through a mesoscopic ring with a magnetic impurity is investigated.Both spin-dependent transmission and reflection coefficients of spin-state electrons at zero-temperature are calculated as a function of the textured electric fields and its title angle in the present of spin-flipper scattering.It is found that the spin-exchange interaction can destroy intermittently periodic oscillations of spin-up transmission and reflection coefficients within some small ranges in the adiabatic region of quantum phase.However spin-down transmission and reflection coefficients appear periodic AC oscillations.The calculated results manifest that spindown transmission and reflection coefficients have the same perfect oscillation patterns.In the nonadiabatic region, the behavior of the anomalous AC oscillations are depedent on the difference between the tilt angle of spin and that of texture electric field. 相似文献
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Aharonov-Casher oscillasions of transmission through a mesoscopic ring with a magnetic impurity is investigated. Both spindependent transmission and reflection coefficients of spin-state electrons at zero-temperature are calculated as a function of the textured electric fields and its title angle in the present of spin-flipper scattering. It is found that the spin-exchange interaction can destroy intermittently periodic oscillations of spin-up transmission and reflection coefficients within some small ranges in the adiabatic region of quantum phase. However spin-down transmission and reflection coefficients appear periodic AC oscillations. The calculated results manifest that spindown transmission and reflection coefficients have the same perfect oscillation patterns. In the nonadiabatic region, the behavior of the anomalous AC oscillations are depedent on the difference between the tilt angle of spin and that of texture electric field. 相似文献
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Oscillations of the spin-polarized conductance controlled by a uniform magnetic field in a modified Aharonov-Bohm ring is studied with use of one-dimensional quantum wave guide.Its expression at zero temperature is obtained as a function of the flux penetrating the ring and the magnetic field.It has been found that there are two kinds of polarized conductance extremas for a given Fermienergy.As Zeemann energy of spin-polarized electron in the stub is varied.one kind of extrema exhibits continuous phase shift .However,another is locked at particular values of phase shift and it can only change abrouptly from a maxima to a minima when Zeemann crosses the level of the bound state of isolated stub.This is a different mehanism for abrupt change phase of conductance osillations. 相似文献
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1IntroductionQuantumtransport in mesoscopic systems has beenextensively investigated in the past two decade[1].Since Wees ,et al.[2]and Wharam,et al.[3]discov-ered the phenomenon of conductance quantization ofan electron through a narrow two-di mensional con-striction,there have been a number of other works ,which are concentrated on studying electron scatteringfrom i mpurities in a narrow quantum conductorwire[4-10].Bagwell and Avishai ,et al.[4-6]have exam-ined the influences of scattering … 相似文献
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The paper studies photon-associated transmission through a quantum wire with a side-coupled stub tuner,to which an external microwave field applies,in terms of the approach developed by Cai.The inelastic scattering of an incoming electron and thd photon field lead to photon-electronic transmission though quantum wier.It is found that single photon absorbing (emitting) of the incoming electron in the stub can bring about antiresonant transmission in the quantum wire.The influence of the feedback mechanism from inelastic scattering process on elastic channel transmission is also examined.Total transmission coefficient as a function of photon energy exhibits non-periodic oscillation peaks.With the increasing of photon-electron coupling constant,the amplitude of these oscillation peaks enhances. 相似文献
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研究局域化磁性杂质引发的散射势对入射电子自旋取向的影响,该势可用Rashba哈密顿项表示.通过解薛定谔方程求得自旋空间的波函数,再由边界条件确定波函数的振幅,进而求出散射矩阵.应用buttiker理论,计算出通过磁性杂质引起的电流和自旋流,结果表明,在低温下,自旋流受电子库中所加磁场影响很小,而受费米能影响较大. 相似文献
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1 Introduction Quantumtransportinmesoscopicsystemshasbeenextensivelyinvestigatedinthe pasttwodecades[1] .SinceWeesetal[2 ] .andWharametal[3] .discoveredthe phenomenonofconductance quantizationofanelectronthroughanarrow pointcontactstructure ,therehavebeenanumberofotherworkswhichcon centratedonstudyingelectronscatteringfromimpuri tiesinanarrowquantumconductorwire .BagwellandAvishaietal[4 9] .haveexaminedtheinfluencesofscatteringfromimpuritiesontheelectrontransmis sioninquantumwirebyusingthe… 相似文献