Results 241 to 250 of about 1,019,732 (289)

Anderson impurities in d-band superconductors

Physics Letters A, 1982
Abstract The effects of Anderson impurities on the critical temperature of a d-band superconductor in which the presence of the conduction band is taken into account is studied. A set of coupled vertex (Bethe-Salpeter) equations in which the exchange is the irreducible vertex function arising from the correlation of the Anderson impurity D-electrons ...
I.M. Tang, S. Roongkeadsakoon
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Chemisorption on d-Band Metals

1980
This chapter is devoted to a discussion of the surface properties of the noble metals and transition metals. There is far and away more experimental data on the surfaces of these metals than on any other class of solid surfaces. The reasons primarily are that their surfaces are relatively easy to clean and they are very important technologically.
F. J. Arlinghaus, J. G. Gay, J. R. Smith
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d-band transitions in solids

Journal of Physics and Chemistry of Solids, 1963
Abstract The significance of measurements of d -band transitions in solids is discussed and qualitative criteria necessary for direct observation of d -band transitions are established. Data on the positions of far ultraviolet absorption edges in In, Sn, Pb, and Bi are presented and the evidence for their assignment to d -band transitions is ...
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Development of D-band Gunn oscillator

2008 International Conference on Recent Advances in Microwave Theory and Applications, 2008
Gunn oscillator has been developed at center frequency of 140 GHz with the output power of 7 dBm using InP Gunn device. Resonant cap design approach was chosen due to its superiority in tunability and low FM noise. The Gunn Oscillator has been temperature cycled form 0degC to +50degC and a frequency stability of 200 KHz/degC was observed.
Meena R. Kumar, Dilip Kumar, A.K. Shukla
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D-band indoor path loss measurements

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2014
This paper presents the path loss measurements of 110 to 170 GHz indoor wireless channels. The measurements are performed in line-of-sight (LoS) and obstructed-line-of-sight (OLoS) environments. The results show that the measured path loss is in good agreement with the theoretically predicted path loss.
Wasif T. Khan, Seunghwan Kim, Alenka Zajic, John Papapolymerou   +3 more
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Force fields in d-band metals

International Journal of Quantum Chemistry, 2009
In transition metals, the d shells lead to relatively hard cores compared with the simpler sp metals. Furthermore, there is some evidence that directional effects due to d orbitals increase through the sequence face-centered-cubic (fcc), hexagonal close-packed (hcp), and body-centered-cubic (bcc) structures.
C. C. Matthai, P. J. Grout, N. H. March
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Local Icosahedral Packing Energetics for d-band Metals

Materials Science and Engineering, 1988
Abstract Local icosahedral order in solid environments is modelled by polytope {3, 3, 5} (a packing of atoms on S 3 , the surface of the unit sphere in four dimensions, with perfect icosahedral symmetry) and by a 147 atom extension of the Mackay icosahedron. The bonding energies of each are calculated in a one-electron d-band, tight binding model, as
Robert B. Phillips, A.E. Carlsson
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Resonance enhancement of the nickel d-band photoemission

Physics Letters A, 1979
Abstract A detailed analysis of the Ni d-band photoemission near the 3p threshold is presented. The results demonstrate that the d-band emission is coupled to the 3p excitation. The coupling is shown to differ for different parts of the d-band.
Barth, J., Kalkoffen, G., Kunz, C.
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A D-Band Millimeter-Wave Crossbar Mixer

MTT-S International Microwave Symposium Digest, 2005
Broadband crossbar mixers in the frequency range from 110-170 GHz using Schottky beam lead diodes were designed and fabricated using 5-mil Duroid substrate. Conversion loss is as low as 7 dB for IF as high as 18 GHz.
L.Q. Bui, N. Ton, D. Ball
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Surface states in d band metals

Journal of Physics F: Metal Physics, 1971
A method for calculating surface states in d band metals is proposed, using a hybrid nearly-free-electron tight-binding theory. The results of model calculations with parameters appropriate to copper and nickel are presented. For copper the results are in agreement with a previous calculation by Forstmann and Heine.
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