نتایج جستجو برای: superconducting critical field
تعداد نتایج: 1243945 فیلتر نتایج به سال:
In this study polycrystaline samples of Y1-2xCaxThxBa2Cu3O7-δ with x=0, 0.025, 0.05, 0.075 were made by standard solid state methods. The transport and superconducting properties have been studied by the thermoelectric power S(x,T) measurements as a function of temperature and doping concentration. The critical temperature decreased linearly by increasing the doping concentration. S(x,T) was a...
The electrical resistivity r of three-dimensional amorphous superconducting films a-Mo3Si and a-Nb3Ge is measured in magnetic fields m0H up to 30 T. At low temperatures and at magnetic fields above the upper critical field Hc2, r is temperature independent and decreases as a function of magnetic field. This field dependence is consistent with localization theory in the high-field limit @m0H@\/(...
We report on a method of nanoSQUID modulation which uses kinetic inductance rather than magnetic inductance to manip-ulate the internal fluxoid state. We produced modulation using injected current rather than an applied magnetic field. Using this injected current, we were able to observe the triangle-wave shaped modulation of the device critical current which was periodic according to the Londo...
The Spallation Neutron Source (SNS) facility utilizes a Superconducting linac to provide a 1 GeV H beam with an average power of 2 MW. A critical part of the accelerator structure is the superconducting radio frequency (SRF) niobium cavities, which are housed in a titanium liquid helium pressure vessel. These vessels maintain the operating temperature of 2.1 Kelvin while facilitating the mechan...
In this paper, a delocalization-localization transition within a superconducting state is explored. The symmetries of the Bogoliubov deGennes Hamiltonian endow the two associated superconducting phases—the thermal metal and the thermal insulator—and the critical point between them, with properties that are in stark contrast with analogous phases in normal systems. Here, for systems preserving s...
The recent observation of the superconducting state at atomic scale has motivated the pursuit of exotic condensed phases in two-dimensional (2D) systems. Here we report on a superconducting phase in two-monolayer crystalline Ga films epitaxially grown on wide-band-gap semiconductor GaN(0001). This phase exhibits a hexagonal structure and only 0.552 nm in thickness, nevertheless, brings about a ...
By using Greens function method we first show that the effective interaction between two electrons mediated by plasmon exchange can become attractive which in turn can lead to superconductivity at a high critical temperature in a singl wall carbon nanotubes (SWCNT). The superconducting transition temperature Tc for the SWCNT (3,3) obtained by this mechanism agrees with the recent experimental...
Superconducting nanowires can exhibit a spatially inhomogeneous pair condensate that leads to the formation of new Andreev-type states. Such states are mainly located beyond the regions where the order parameter is enhanced, and no normal-superconducting contact or external magnetic field is needed for their formation. Our numerical self-consistent solutions of the Bogoliubov-de Gennes equation...
Mechanical relaxation experiments have been widely applied to bulk high temperature (HT,) superconducting materials. In contrast to that only few results obtained on HT, superconducting thin films were reported. None dealt with stress driven phenomena due to the high background damping from the substrate materials used. In applied magnetic fields, however, a host reed technique can be used and ...
Superconducting low dimensional systems are the natural choice for fast and sensitive infrared detection, because of their quantum nature and the low-noise, cryogenic operation environment. On the other hand, monochromatic and coherent electron beams, emitted from superconductors and carbon-based nanostructured materials, respectively, are significant for the development of electron optical sys...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید