Transport and Point Contact Measurements on Pr1−xCexPt4Ge12 Superconducting Polycrystals

Single Point Contact Measurements of Mechanical Resonances

In this paper we present a novel technique for measuring the material properties of spherical objects. The technique is also capable of detecting the presence of surface defects in these objects. We excite resonances of spheres at both low and high frequencies. Resonances are generated by forming a one-point Hertzian contact between the sphere and a spherical depression in a buffer rod with a t...

Point-contact spectroscopic studies on normal and superconducting AFe2As2-type iron pnictide single crystals

Point-contact Andreev reflection spectroscopy is applied to investigate the gap structure in iron pnictide single-crystal superconductors of the AFe2As2 (A = Ba, Sr) family (‘Fe-122’). The observed point-contact junction conductance curves, G(V ), can be divided into two categories: one where Andreev reflection is present for both (Ba0.6K0.4)Fe2As2 and Ba(Fe0.9Co0.1)2As2, and the other with a V...

Tomographic measurements on superconducting qubit states

Yu-xi Liu,1 L. F. Wei,1,2 and Franco Nori1,3 1Frontier Research System, The Institute of Physical and Chemical Research (RIKEN), Wako-shi 351-0198, Japan 2Institute of Quantum Optics and Quantum Information, Department of Physics, Shanghai Jiaotong University, Shanghai 200030, People’s Republic of China 3Center for Theoretical Physics, Physics Department, Center for the Study of Complex Systems...

Contact Measurements on Atomic BEC

Andreev-reflection and Point-contact Spectroscopy of Superconducting Rare Earth Transition Metal Borocarbides