Results 261 to 270 of about 15,408,531 (299)
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Surface states in d band metals
Journal of Physics F: Metal Physics, 1971A 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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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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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, 1988Abstract 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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Coexistence of superconductivity and ferromagnetism in the d-band metal ZrZn2
Nature, 2001It has generally been believed that, within the context of the Bardeen-Cooper-Schrieffer (BCS) theory of superconductivity, the conduction electrons in a metal cannot be both ferromagnetically ordered and superconducting. Even when the superconductivity has been interpreted as arising from magnetic mediation of the paired electrons, it was thought that
Pfleiderer, C +6 more
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2022 International Conference on Microwave and Millimeter Wave Technology (ICMMT), 2022
Liu Jun, Song Ruiliang, Lv Xin
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Liu Jun, Song Ruiliang, Lv Xin
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Modulation Optimization for D-band Wireless Transmission Link
Optical Fiber Communication Conference, 2017High-performance high-frequency mm-wave amplifier and other components, particularly those at D-band, are difficult to manufacture. We optimize modulation format for one 150-GHz D-band vector-mm-wave system and demonstrate OFDM can better tolerate imperfect-gain-characteristic of D-band amplifier.
Xinying Li +4 more
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A Review of the D-band Antennas
2022 14th Global Symposium on Millimeter-Waves & Terahertz (GSMM), 2022Amir Altaf, Munkyo Seo
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The Dependence of Graphene Raman D-band on Carrier Density
Nano Letters, 2013Raman spectroscopy has been an integral part of graphene research and can provide information about graphene structure, electronic characteristics, and electron-phonon interactions. In this study, the characteristics of the graphene Raman D-band, which vary with carrier density, are studied in detail, including the frequency, full width half-maximum ...
Junku, Liu +7 more
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Si-based D-band frequency conversion circuits
2012 International SoC Design Conference (ISOCC), 2012A review on the Si-based D-band frequency circuits recently developed in Korea University is presented. Low power mixers operating near 140 GHz have been implemented based on SiGe BiCMOS and Si CMOS technologies. A couple of injection-locked frequency dividers with SiGe BiCMOS technology working around 140 GHz, which are intended for wide locking range,
Dong-Hyun Kim +2 more
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Embedded component packaging for D-band radio systems
2024 Joint European Conference on Networks and Communications & 6G Summit (EuCNC/6G Summit)The paper presents an embedded component packaging platform for D-band radio systems. The embedded component packaging is highly reliable due to optimal protection of the embedded components and good heat dissipation. Key elements of the platform are tested. The testing shows promising results in terms of insertion loss, achieving~0.5 dB per transition
Schober, Mario +3 more
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