We investigated the inHuences of a uniform and a nanoscaled periodic magnetic Held on electron Js resonant tunneling through quantum-wire arrays(QWA).It is shown that,due to the magnetic quantum-size effect and additi...We investigated the inHuences of a uniform and a nanoscaled periodic magnetic Held on electron Js resonant tunneling through quantum-wire arrays(QWA).It is shown that,due to the magnetic quantum-size effect and additional destructive interfisrence induced by the nanoscaled periodic magnetic Held,ballistic conductance spectrum for electron tunneling through the QWA is strongly modified;while for uniform magnetic modulationj it cannot modify the resonant structure of ballistic conductance.展开更多
An approximate analytic solution is present for a system of two Bose-Einstein condensates(BECs)with a Josephson-like coupling.By the use of this approximate solution,it is shown that the existence of quantum collapses...An approximate analytic solution is present for a system of two Bose-Einstein condensates(BECs)with a Josephson-like coupling.By the use of this approximate solution,it is shown that the existence of quantum collapses and revivals(QCRs)in the interferencing intensity of two BECs.It is found that QCRs are seriously affected not only by interatomic collisions and the atomic tunneling between two BECs but also by initial states of the two BECs,so that one can manipulate QCRs through changing scattering lengths of atoms,atomic tunneling and initial states of BECs.展开更多
Pb-doped HgBa_(2)CaCu_(2)O_(y) films were prepared on the(100)SrTiO_(3) substrate by using laser ablation followed by post-Hg-vapor annealing.These films are dominated by c-axis-oriented Hg-1212 phase as indicated by ...Pb-doped HgBa_(2)CaCu_(2)O_(y) films were prepared on the(100)SrTiO_(3) substrate by using laser ablation followed by post-Hg-vapor annealing.These films are dominated by c-axis-oriented Hg-1212 phase as indicated by x-ray diffraction and electromagnetic measurements.The transition temperature Tc0 is 110 K.The critical current density Jc achieved 10^(6) A/cm^(2) at 77K and zero applied field.展开更多
基金Supported by the Climbing Program of National Commission of Sciences and Technology of China。
文摘We investigated the inHuences of a uniform and a nanoscaled periodic magnetic Held on electron Js resonant tunneling through quantum-wire arrays(QWA).It is shown that,due to the magnetic quantum-size effect and additional destructive interfisrence induced by the nanoscaled periodic magnetic Held,ballistic conductance spectrum for electron tunneling through the QWA is strongly modified;while for uniform magnetic modulationj it cannot modify the resonant structure of ballistic conductance.
基金Supported in part by the Climbing Program of National Commission of Science and Technology of ChinaNatianal Natural Science Foundation of China under Grant No.19674013Natural Science Foundation of Huznan province.
文摘An approximate analytic solution is present for a system of two Bose-Einstein condensates(BECs)with a Josephson-like coupling.By the use of this approximate solution,it is shown that the existence of quantum collapses and revivals(QCRs)in the interferencing intensity of two BECs.It is found that QCRs are seriously affected not only by interatomic collisions and the atomic tunneling between two BECs but also by initial states of the two BECs,so that one can manipulate QCRs through changing scattering lengths of atoms,atomic tunneling and initial states of BECs.
基金Supported by the National Center for Research and Development on Superconductivity of Chinathe Foundation for Doctoral Education.
文摘Pb-doped HgBa_(2)CaCu_(2)O_(y) films were prepared on the(100)SrTiO_(3) substrate by using laser ablation followed by post-Hg-vapor annealing.These films are dominated by c-axis-oriented Hg-1212 phase as indicated by x-ray diffraction and electromagnetic measurements.The transition temperature Tc0 is 110 K.The critical current density Jc achieved 10^(6) A/cm^(2) at 77K and zero applied field.
