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“Orientational order and disorder in solid C60 : theory and diffraction experiments”. Michel KH, Lamoen D, David WIF, Acta crystallographica: section A: foundations of crystallography 51, 365 (1995). http://doi.org/10.1107/S0108767394013280
Abstract: Starting from a microscope model of the intermolecular potential, a unified description is presented of the Bragg scattering law in the orientationally disordered and in the ordered phase of solid C-60. The orientational structure factor is expanded in terms of symmetry-adapted surface harmonics. The expansion coefficients are calculated from theory and compared with experiment Their temperature evolution is studied in the disordered phase at the 260 K transitions and in the ordered phase. In the ordered phase, new results from high-resolution neutron powder diffraction are given. In the disordered phase, space group Fm $($) over bar$$ 3m, the reflections have A(1g) symmetry; in the ordered phase, space group Pa $$($) over bar 3, reflections of T-2g symmetry appear and in addition the A(1g) reflections are renormalized. The orientational density distribution is calculated. The effective crystal-field potential is constructed, its temperature evolution in the ordered phase is studied and related to the occurrence of an orientational glass.
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
Impact Factor: 2.307
Times cited: 14
DOI: 10.1107/S0108767394013280
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“Nonlinear Schrödinger equation on a circle”. Smondyrev MA, Vansant P, Peeters FM, Devreese JT, Physical review : B : condensed matter and materials physics 52, 11231 (1995). http://doi.org/10.1103/PhysRevB.52.11231
Abstract: The nonlinear Schrodinger equation is solved on an infinitesimal thin ring or circle. We obtained the exact real wave functions with their corresponding energies for the ground state and the excited states. Critical values of the circle perimeter are found at which the ground state changes its structure and additional higher excited states appear. Also, the complex wave functions that correspond to energy levels with finite angular momentum are studied.
Keywords: A1 Journal article; Condensed Matter Theory (CMT); Theory of quantum systems and complex systems
Impact Factor: 3.736
Times cited: 5
DOI: 10.1103/PhysRevB.52.11231
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“Multisubband electron-transport in delta-doped semiconductor systems”. Hai, Studart, Peeters FM, Physical review : B : condensed matter and materials physics 52, 8363 (1995). http://doi.org/10.1103/PhysRevB.52.8363
Abstract: The electron transport properties in delta-doped semiconductor systems-are studied. The subband electronic structure of the delta-doped system is obtained by solving the coupled Schrodinger and Poisson equations. The screening of the quasi-two-dimensional electron gas is taken into account for the ionized impurity scattering through the matrix dielectric function within the random-phase approximation. The quantum and transport mobilities are calculated numerically as a function of the total electron density and the width of the doped layer at zero temperature. The intersubband scattering and the effect of empty subbands above the Fermi level on the electron mobilities are investigated. The calculated mobilities are in reasonable agreement with the available experimental results.
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
Impact Factor: 3.736
Times cited: 67
DOI: 10.1103/PhysRevB.52.8363
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“Modeling of metastable argon atoms in a direct current glow discharge”. Bogaerts A, Gijbels R, Physical review : A : atomic, molecular and optical physics 52, 3743 (1995). http://doi.org/10.1103/PhysRevA.52.3743
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 2.808
Times cited: 98
DOI: 10.1103/PhysRevA.52.3743
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“Microscopic theory of orientational disorder and lattice instability in solid C70”. Callebaut AK, Michel KH, Physical review : B : condensed matter and materials physics 52, 15279 (1995). http://doi.org/10.1103/PhysRevB.52.15279
Abstract: We have developed a microscopic theory which describes the orientational dynamics of C-70 molecules and its coupling to lattice displacements in the face-centered-cubic phase of C-70 fullerite. The single-molecule orientational density distribution in the disordered phase is calculated. The ferroelastic transition to the rhombohedral phase is investigated. The discontinuity of the orientational order parameter at the phase transition is calculated. It is found that the transition leads to a stretching of the primitive unit cell along a [111] cubic direction. A softening of the elastic constant c(44) at the transition is predicted.
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
Impact Factor: 3.736
Times cited: 20
DOI: 10.1103/PhysRevB.52.15279
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“Magnetotransport in a pseudomorphic GaAs/Ga0.8In0.2As/Ga0.75Al0.25As heterostructure with a Si \delta-doping layer”. van der Burgt M, Karavolas VC, Peeters FM, Singleton J, Nicholas RJ, Herlach F, Harris JJ, Van Hove M, Borghs G, Physical review : B : condensed matter and materials physics 52, 12218 (1995). http://doi.org/10.1103/PhysRevB.52.12218
Abstract: Magnetotransport properties of a pseudomorphic GsAs/Ga0.8In0.2As/Ga0.75Al0.25As heterostructure are investigated in pulsed magnetic fields up to 50 T and at temperatures of T = 1.4 and 4.2 K. The structure studied consists of a Si delta layer parallel to a Ga0.8In0.2As quantum well (QW). The dark electron density of the structure is n(c) = 1.67 x 10(16) m(-2). By illumination the density can be increased up to a factor of 4; this way the second subband in the Ga0.08In0.2As QW can become populated as well as the Si delta layer. The presence of electrons in the delta layer results in drastic changes in the transport data, especially at magnetic fields beyond 30 T. The phenomena observed are interpreted as (i) magnetic freeze-out of carriers in the delta layer when a low density of electrons is present in the delta layer, and (ii) quantization of the electron motion in the two-dimensional electron gases in both the Ga0.8In0.2As QW and the Si delta layer in the case of high densities. These conclusions are corroborated by the numerical results of our theoretical model. We obtain satisfactory agreement between model and experiment.
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
Impact Factor: 3.736
Times cited: 43
DOI: 10.1103/PhysRevB.52.12218
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“Magnetopolaron effect on the donor transition energies in ZnSe”. Shi JM, Peeters FM, Devreese JT, Imanaka Y, Miura N, Physical review : B : condensed matter and materials physics 52, 17205 (1995). http://doi.org/10.1103/PhysRevB.52.17205
Keywords: A1 Journal article; Condensed Matter Theory (CMT); Theory of quantum systems and complex systems
Impact Factor: 3.736
Times cited: 7
DOI: 10.1103/PhysRevB.52.17205
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“Hole subbands and effective masses in p-doped [113]-grown heterojunctions”. Goldoni G, Peeters FM, Physical review : B : condensed matter and materials physics 51, 17806 (1995). http://doi.org/10.1103/PhysRevB.51.17806
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
Impact Factor: 3.736
Times cited: 14
DOI: 10.1103/PhysRevB.51.17806
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“Electron-mobility in 2 coupled delta-layers”. Hai, Studart, Peeters FM, Physical review : B : condensed matter and materials physics 52, 11273 (1995). http://doi.org/10.1103/PhysRevB.52.11273
Abstract: The low-temperature transport properties are studied for electrons confined in delta-doped semiconductor structures with two sheets in parallel. The subband quantum mobility and transport mobility are calculated numerically for the Si delta-doped GaAs systems. The effect of coupling of the two delta layers on the electron transport is investigated. Our calculations are in good agreement with experimental results.
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
Impact Factor: 3.736
Times cited: 25
DOI: 10.1103/PhysRevB.52.11273
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“Asymptotic expansions in the path integral approach to the bipolaron problem”. Smondyrev MA, Devreese JT, Peeters FM, Physical review : B : condensed matter and materials physics 51, 15008 (1995). http://doi.org/10.1103/PhysRevB.51.15008
Keywords: A1 Journal article; Condensed Matter Theory (CMT); Theory of quantum systems and complex systems
Impact Factor: 3.736
Times cited: 32
DOI: 10.1103/PhysRevB.51.15008
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“Weathering of Leinster granite under ambient atmospheric conditions”. Sweevers E, Peeters A, Van Grieken R, The science of the total environment 167, 73 (1995). http://doi.org/10.1016/0048-9697(95)04571-H
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1016/0048-9697(95)04571-H
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“Suspended matter in run-off water from limestone exposure setups”. Vleugels G, Van Grieken R, The science of the total environment 170, 125 (1995). http://doi.org/10.1016/0048-9697(95)04611-4
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1016/0048-9697(95)04611-4
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“Y2O3 inclusions in YBa2Cu3O7-\delta thin films”. Verbist K, Vasiliev AL, Van Tendeloo G, Applied physics letters 66, 1424 (1995). http://doi.org/10.1063/1.113266
Abstract: Nanoprecipitates in YBa2Cu3O7‐δ(YBCO) thin films have been identified by high resolution electron microscopy (HREM) as Y2O3 inclusions; they correspond to two different types of epitaxial relationships namely [001] or [110] parallel to the YBCOc‐axis. The [001] precipitates are situated near the YBCO surface, in the bulk and on the YBCO film/substrate interface. The [110] precipitates have only been observed at the surface. Literature data have been reinterpreted.
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 3.302
Times cited: 28
DOI: 10.1063/1.113266
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“Structures and thermochemistry of B3N3 and B4N4”. Martin JML, El-Yazal J, François JP, Gijbels R, Chemical physics letters 232, 289 (1995). http://doi.org/10.1016/0009-2614(94)01336-T
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 1.897
Times cited: 35
DOI: 10.1016/0009-2614(94)01336-T
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“The role of fast argon ions and atoms in the ionization of argon in a direct current glow discharge: a mathematical simulation”. Bogaerts A, Gijbels R, Journal of applied physics 78, 6427 (1995). http://doi.org/10.1063/1.360526
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 2.183
Times cited: 60
DOI: 10.1063/1.360526
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“Monte Carlo simulation of an analytical glow discharge: motion of electrons, ions and fast neutrals in the cathode dark space”. Bogaerts A, van Straaten M, Gijbels R, Spectrochimica acta: part B : atomic spectroscopy 50, 179 (1995). http://doi.org/10.1016/0584-8547(94)00117-E
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 3.176
Times cited: 95
DOI: 10.1016/0584-8547(94)00117-E
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“Hybrid Monte Carlo-fluid model of a direct current glow discharge”. Bogaerts A, Gijbels R, Goedheer W, Journal of applied physics 78, 2233 (1995). http://doi.org/10.1063/1.360139
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 2.183
Times cited: 117
DOI: 10.1063/1.360139
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“Description of the thermalization process of the sputtered atoms in a glow discharge using a 3-dimensional Monte Carlo method”. Bogaerts A, van Straaten M, Gijbels R, Journal of applied physics 77, 1868 (1995). http://doi.org/10.1063/1.358887
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 2.183
Times cited: 87
DOI: 10.1063/1.358887
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“Crystal-structure of the double-hg-layer copper-oxide superconductor (Hg,Pr)2Ba2(Y,Ca)Cu2O8-\deltaas a function of doping”. Radaelli PG, Marezio M, Tholence JL, Debrion S, Santoro A, Huang Q, Capponi JJ, Chaillout C, Krekels T, Van Tendeloo G, The journal of physics and chemistry of solids 56, 1471 (1995). http://doi.org/10.1016/0022-3697(95)00084-4
Abstract: The crystal structure of the newly discovered double-Hg-layer copper oxide superconductor (Hg, Pr)(2)Ba-2(Y, Ca)Cu2O8-delta was studied as a function of chemical doping using neutron and electron diffraction and high-resolution transmission electron microscopy (HREM). Rietveld refinements of the structural parameters from neutron powder diffraction data indicate that the oxygen site O3 on the mercury plane is highly defective, being both partially occupied and displaced from the high-symmetry position. The variable concentration of oxygen vacancies partially compensates for the cation doping and, together with the O3 displacement field, makes some of the Hg atoms acquire an unusual pyramidal coordination. HREM images confirm that the structure is of the '2212' type, with very few defects. In some grains, faint superstructure reflections were evidenced by electron diffraction, suggesting that both the oxygen vacancies and the O3 displacement field may order at least on a local scale.
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 1.853
Times cited: 16
DOI: 10.1016/0022-3697(95)00084-4
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“The elemental chemistry of sediments in the Nainital lake, Kumaun Himalaya, India”. Das BK, Singh M, Van Grieken R, The science of the total environment 168, 85 (1995). http://doi.org/10.1016/0048-9697(95)04242-S
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1016/0048-9697(95)04242-S
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“Structural aspects of AuCu I or AuCu II and a cuboidal black configuration of f.c.c. disordered phase in AuCu-Pt and AuCu-Ag pseudobinary alloys”. Udoh K-I, El- Araby AM, Tanaka Y, Hisatsune K, Yasuda K, Van Tendeloo G, van Landuyt J, Materials science and engineering: part A: structural materials: properties, microstructure and processing 203, 154 (1995). http://doi.org/10.1016/0921-5093(95)09850-X
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 2.567
Times cited: 15
DOI: 10.1016/0921-5093(95)09850-X
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“On the interpretation of HREM images of partially ordered alloys”. De Meulenaere P, Van Tendeloo G, van Landuyt J, van Dyck D, Ultramicroscopy 60, 265 (1995). http://doi.org/10.1016/0304-3991(95)00065-9
Abstract: The ordering for 11/20 alloys has been studied by high-resolution electron microscopy (HREM). The distribution of the intensity maxima in the HREM image have been statistically examined, which provides a profound basis for the image interpretation. Processing of the HREM images allows ''dark-field'' images to be obtained, exhibiting a two-dimensional distribution of those columns which contain the most information in order to interpret the short-range order correlations. Pair correlations and higher cluster correlations between projected columns can be visualised, providing unique information about the ordering as retrieved from an experimental result without any other assumption. The method has been applied to Au4Cr and to Au4Mn to interpret the quenched short-range order state and the transition to long-range order.
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT); Vision lab
Impact Factor: 2.436
Times cited: 20
DOI: 10.1016/0304-3991(95)00065-9
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“In-situ TEM study of the Ni5Al3 to B2 + L12 decomposition in Ni65Al35”. Schryvers D, Ma Y, Materials letters 23, 105 (1995). http://doi.org/10.1016/0167-577X(95)00030-5
Abstract: Homogenised and quenched Ni65Al35 samples were heated and studied in situ in a CM20 electron microscope up to 900 degrees C. The Ni5Al3 phase first forming around 550 degrees C in the quenched L1(0) microtwinned martensite starts to decompose around 800 degrees C yielding B2 precipitates in a twinned L1(2) matrix. The latter twinning is a remainder of the microtwinning in the original room temperature martensite. Also the crystallographic relations between precipitates and matrix can be traced back to the original formation of twinned martensite plates within the austenite. Some aspects of the dynamics of the process are discussed on the basis of snap shots and video recordings.
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 2.489
Times cited: 5
DOI: 10.1016/0167-577X(95)00030-5
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“Hydrogeochemical exploration for gold in the Osilo area, Sardinia, Italy”. Cidu R, Fanfani L, Shand P, Edmunds WM, Van 't dack L, Gijbels R, Applied geochemistry 10, 517 (1995). http://doi.org/10.1016/0883-2927(95)00022-4
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 2.268
Times cited: 10
DOI: 10.1016/0883-2927(95)00022-4
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“The growth of Ni5Al3 in L10 martensite studied by in situ transmission electron microscopy and high resolution electron microscopy”. Schryvers D, Ma Y, Journal of alloys and compounds 221, 227 (1995). http://doi.org/10.1016/0925-8388(94)01467-1
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 2.999
Times cited: 19
DOI: 10.1016/0925-8388(94)01467-1
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“Gallium colloid formation during ion implantation of glass”. Hole DE, Townsend PD, Barton JD, Nistor LC, van Landuyt J, Journal of non-crystalline solids 180, 266 (1995). http://doi.org/10.1016/0022-3093(94)00477-3
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 1.766
Times cited: 34
DOI: 10.1016/0022-3093(94)00477-3
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“EM, XPS and LEED study of deposition of Ag on hydrogenated Si substrate prepared by wet chemical treatments”. Zhang XB, Vasiliev AL, Van Tendeloo G, He Y, Yu L-M, Thiry PA, Surface science : a journal devoted to the physics and chemistry of interfaces 340, 317 (1995). http://doi.org/10.1016/0039-6028(95)00699-0
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 1.925
Times cited: 11
DOI: 10.1016/0039-6028(95)00699-0
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“Dynamical electron diffraction in substitutionally disordered column structures”. De Meulenaere P, van Dyck D, Van Tendeloo G, van Landuyt J, Ultramicroscopy 60, 171 (1995). http://doi.org/10.1016/0304-3991(95)00040-8
Abstract: For column structures, such as fee-based alloys viewed along the cube direction, the concept of electron channelling through the atom columns is more and more used to interpret the corresponding HREM images. In the case of(partially) disordered columns, the projected potential approach which is used in the channelling description must be questioned since the arrangement of the atoms along the beam direction might affect the exit wave of the electrons. In this paper, we critically inspect this top-bottom effect using multi-slice calculations. A modified channelling theory is introduced which turns out to be very appropriate for the interpretation of these results. For substitutionally disordered column structures, it is also discussed how to link the chemical composition of the material to statistical data of the HREM image. This results in a convenient tool to discern images taken at different thicknesses and focus values.
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT); Vision lab
Impact Factor: 2.436
Times cited: 14
DOI: 10.1016/0304-3991(95)00040-8
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“The use of surface analysis techniques and isotope mass spectrometry for the study of water-rock interactions of interest in hot-dry rock technology”. Adriaens A, van Nevel L, Van 't dack L, de Bièvre P, Adams F, Gijbels R, , 2541 (1995)
Keywords: P3 Proceeding; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
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“A transmission electron microscopy study of tweed-like structures in Al62Cu17.5CO17.5Si3 decagonal quasicrystals”. Zhang Z, Geng W, van Landuyt J, Van Tendeloo G, Philosophical magazine: A: physics of condensed matter: defects and mechanical properties 71, 1177 (1995)
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Times cited: 7
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