Zobrazeno 1 - 10
of 70
pro vyhledávání: '"H.F.C. Hoevers"'
Autor:
Stephen J. C. Yates, J.N. Hovenier, Jochem J. A. Baselmans, T.M. Klapwijk, J.R. Gao, H.F.C. Hoevers, Rami Barends
Publikováno v:
IEEE Transactions on Applied Superconductivity. 17:263-266
We have measured the quality factors and phase noise of niobium and tantalum coplanar waveguide microwave resonators on silicon. The results of both materials are similar. We reach quality factors up to 105. At low temperatures the quality factors sh
Publikováno v:
Journal of Physics: Condensed Matter. 6:65-72
Point-contact junctions on normal-metal-superconductor bilayers show asymmetries of different magnitudes and signs in the differential resistance versus voltage curves for opposite-bias voltages. In the absence of Andreev reflection (i.e. for energie
Autor:
H.F.C. Hoevers, H. van Kempen
Publikováno v:
Physica B: Condensed Matter. 175:253-255
Diffraction of conduction electrons is observed using transverse electron focusing. The stepped Cu(4 1 0) surface acts as a reflection grating for the conduction electrons. This results in extra voltage peaks in the focusing spectrum. The magnetic fi
Publikováno v:
Physical review. B, Condensed matter. 45(7)
Publikováno v:
Physica C: Superconductivity. 166:543-544
Autor:
H. van Kempen, M.J.M.F. de Nivelle, H.F.C. Hoevers, L.W.M. Schreurs, P.J.M. van Bentum, P.A.A. Teunissen, R. T. M. Smokers, L.E.C. Van De Leemput
Publikováno v:
Physica Scripta. :91-96
We have determined the gap in the excitation spectrum of the high Tc superconductor YBa2Cu3O7-δ by three independent techniques: quansiparticle tunneling with a low temperature scanning tunneling microscope, far infrared reflection spectroscopy, and
Publikováno v:
Review of Scientific Instruments. 60:1316-1320
We have constructed a double point‐contact system for use at liquid‐helium temperatures which is adjustable from the outside. Both point‐contact wires can be independently displaced vertically with a travel of 5 mm and horizontally with a trave
Autor:
D. van der Marel, L.E.C. Van De Leemput, P.J.M. van Bentum, H. van Kempen, A.J.G. Schellingerhout, H.F.C. Hoevers
Publikováno v:
Physica C: Superconductivity. 152:105-110
We have observed for the first time Andreev reflection at the normal metal-superconductor interface in a thin film Ag-YBa 2 Cu 3 O 7− x sample, which indicates a zero-momentum paired state in this high- T c superconductor. The energy-dependence of
Autor:
L.W.M. Schreurs, H.F.C. Hoevers, P.A.A. Teunissen, H. van Kempen, M.J.M.F. de Nivelle, R. T. M. Smokers, P.J.M. van Bentum, L.E.C. Van De Leemput
Publikováno v:
Physica C: Superconductivity. :1718-1723
The energy gap of bulk and thin film YBa 2 Cu 3 O 7−δ has been studied with three independent techniques: Quasiparticle Tunneling in a low temperature scanning tunneling microscope, Andreev Reflection at a normal/superconductor interface and Far I
Publikováno v:
Journal of Magnetism and Magnetic Materials. :561-567
We present the results of energy resolved measurements of the reflection of charge carriers at a silver-YBa 2 Cu 3 O 7−δ interface, and of quasiparticle tunneling into thin film and sintered bulk samples of the same high T c superconductor. The ob