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Final-state read-out of exciton qubits by observing resonantly excited photoluminescence in quantum dots
K. Kuroda, T. Kuroda, K. Watanabe +4
We report on a new approach to detect excitonic qubits in semiconductor quantum dots by observing spontaneous emissions from the relevant qubit level. The ground state of excitons…
Improved critical current densities in MgB2 tapes with ZrB2 doping
Xianping Zhang, Zhaoshun Gao, Dongliang Wang +4
MgB2/Fe tapes with 2.5-15 at.% ZrB2 additions were prepared through the in situ powder-in-tube method. Compared to the pure tape, a significant improvement in the in-field critical…
Improved properties of epitaxial YNixMn1-xO3 films by annealing under high magnetic fields
Yanwei Ma, Aixia Xu, Xiaohang Li +4
The effect of annealing under a magnetic field on the microstructure and properties of YNixMn1-xO3 (x=0.33 and 0.5) films has been investigated. It is found that the ferromagnetic…
Large irreversibility field in nanoscale C-doped MgB2/Fe tape conductors
Yanwei Ma, Xianping Zhang, S. Awaji +5
We investigated the effect of nanoscale-C doping on the critical current density Jc and irreversibility field Birr of Fe-sheathed MgB2 tapes prepared by the in-situ powder-in-tube…
Discovery of Li2(Pd,Pt)3B superconductors
P. Badica, K. Togano, H. Takeya +3
Critical temperature Tc of the Li2(Pd1-xPtx)3B was reported to be 7-8K for x=0 and 2.2-2.8K for x=1. In this article we present our preliminary results on behavior of magnetization…
Significantly enhanced critical current densities in MgB2 tapes made by a scaleable, nano-carbon addition route
Yanwei Ma, Xianping Zhang, G. Nishijima +2
Nanocarbon-doped Fe-sheathed MgB2 tapes with different doping levels were prepared by the in situ powder-in-tube method. Compared to the undoped tapes, Jc for all the C-doped sampl…