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IBM Journal of Research and Development

Issue 3 • Date May 1978

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Displaying Results 1 - 15 of 15
  • Preface

    Publication Year: 1978 , Page(s): 212
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (189 KB)  

    It has been recognized for many years that the understanding and exploitation of solid state phenomena depend largely on the ability to accurately describe the microscopic structures of surfaces and interfaces, and to define correlations between those structures and physical and chemical phenomena of interest. Only during the last decade have experimental and theoretical tools been developed that ... View full abstract»

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  • Model Study in Chemisorption: Molecular Orbital Cluster Theory for Atomic Hydrogen on Be(0001)

    Publication Year: 1978 , Page(s): 213 - 234
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1063 KB)  

    The interaction between atomic hydrogen and the (0001) surface of Be has been studied by using clusters of Be atoms to simulate the substrate. The largest cluster used contains 22 Be atoms, 14 in the first layer and 8 in a second layer. An H atom is added to the Be clusters at four high symmetry adsorption sites. Ab initio molecular orbital Hartree-Fock wave functions have been obtained and the in... View full abstract»

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  • Core-Level Photoemission and LEED Studies of Adsorption at Fe Surfaces: Comparison Between CO and O2

    Publication Year: 1978 , Page(s): 235 - 249
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (737 KB)  

    Carbon monoxide and oxygen interactions with αFe(100) and polycrystalline surfaces have been studied by x-ray photoemission (XPS or ESCA) and low energy electron diffraction (LEED) at temperatures between 123 K and 473 K. For CO, the XPS results demonstrate the existence of four electronically distinct CO adsorption states; one is dissociative and three are molecular. The binding energy ana... View full abstract»

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  • Reaction of Atomic Hydrogen with Si(111) Surfaces: Formation of Monohydride and Trihydride Phases

    Publication Year: 1978 , Page(s): 250 - 259
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (636 KB)  

    By using a realistic tight-binding or LCAO (linear combination of atomic orbitals) model, detailed calculations of surface states, local densities of states, and theoretically simulated photoemission spectra have been carried out for two qualitatively distinct structural models for chemisorption of atomic hydrogen on Si(111)1×1 surfaces. In the low-coverage model, called the monohydride pha... View full abstract»

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  • Chemisorption of Ethane on W(111)

    Publication Year: 1978 , Page(s): 260 - 264
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (428 KB)  

    Ethane is chemisorbed on W(111) with a sticking probability of ≈0.003. The carbon Auger spectrum at saturation co verage exhibits a two-peak structure similar to that for graphite, while the LEED (low energy electron diffraction) pattern is almost identical to that obtained for an atomically clean surface. Heating the surface to ≈773 K causes desorption of hydrogen and changes th e c... View full abstract»

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  • Molecular Geometries of Acetylene and Ethylene Chemisorbed On Cu, Ni, Pd, and Pt Surfaces

    Publication Year: 1978 , Page(s): 265 - 276
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (731 KB)  

    Ultraviolet photoemission measurements of the valence orbital electronic structure of acetylene and ethylene chemisorbed on Cu(100) or Cu(111), Ni(111), Pd(111), and Pt(111) are presented. We compare the measured energy levels of these chemisorbed species to those of the free molecule and use a similar comparison of the relative changes in ground state energy levels of distorted free molecules cal... View full abstract»

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  • Sputter Profiling Through Ni/Fe Interfaces by Auger Electron Spectroscopy

    Publication Year: 1978 , Page(s): 277 - 284
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (490 KB)  

    Sputter characteristics of nickel-iron systems in the form of layer interfaces and bulk alloy films have been studied by Auger electron spectroscopy. The sputter rates for pure nickel and iron and their alloys have been determined and are independent (within 10%) of the grain size and film composition. The various factors that contribute to the broadening of depth profiles have been examined. The ... View full abstract»

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  • Characterization of Electron Traps in Aluminum-Implanted SiO2

    Publication Year: 1978 , Page(s): 285 - 288
    Cited by:  Papers (1)  |  Patents (12)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (355 KB)  

    Johnson, Johnson, and Lampert have studied the effect of Al implantation on the trapping behavior of SiO2. The large fluence that they used (1 × 1014 Al/cm2) and the low annealing temperatures (up to 600°C) resulted in a trapping efficiency of 1 and made it impossible to characterize the traps. In the present study a lower fluence and higher annealing... View full abstract»

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  • Location of Trapped Charge in Aluminum-Implanted SiO2

    Publication Year: 1978 , Page(s): 289 - 293
    Cited by:  Papers (1)  |  Patents (3)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (384 KB)  

    The position of the centroid of electrons trapped on sites resulting from aluminum implantation into SiO2 is measured by using the photo I–V technique for energies from 15–40 keV, oxide thicknesses from 49–140 nm, and post-implant annealing temperatures from 600–1050°C in N2 for 30 min. The centroid of the trapped electrons is found to be id... View full abstract»

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  • Electronic Properties of (100) Surfaces of GaSb and InAs and Their Alloys with GaAs

    Publication Year: 1978 , Page(s): 304 - 314
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (672 KB)  

    Smooth, monocrystalline (100) surfaces of the alloys In1−xGaxAs and GaSb1−y Asy were prepared by molecular beam epitaxy. Both As-stabilized c(2 × 8) and metal-stabilized c(8 × 2) surface reconstructions were observed for In1−xGaxAs over the entire alloy range. GaSb1−yAs... View full abstract»

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  • Oriented Epitaxial Films of (NMP) (TCNQ)

    Publication Year: 1978 , Page(s): 315 - 320
    Cited by:  Patents (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (513 KB)  

    An important step in the characterization of organic conductors is the ability to correlate the solid state electrical properties of these materials with their composition and crystal structure. In many cases it has not been possible to grow single crystals of suitable size or purity for such investigations. The use of epitaxial films represents an alternative approach. In addition, such films may... View full abstract»

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  • Recent Papers by IBM Authors

    Publication Year: 1978 , Page(s): 321 - 325
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (457 KB)  

    Reprints of the papers listed here may usually be obtained by writing directly to the authors. The authors' IBM divisions are identified as follows: CHQ is Corporate Headquarters; DPD, Data Processing Division; FED, Field Engineering Division; FSD, Federal Systems Division; GPD, General Products Division; GSD, General Systems Division; GTD, General Technology Division: OPD, Office Products Divisio... View full abstract»

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  • Recent IBM Patents

    Publication Year: 1978 , Page(s): 326 - 327
    Save to Project icon | PDF file iconPDF (206 KB)  
    Freely Available from IEEE
  • Authors

    Publication Year: 1978 , Page(s): 328 - 330
    Save to Project icon | PDF file iconPDF (284 KB)  
    Freely Available from IEEE
  • X-Ray Photoelectron Spectroscopy of SiO2-Si Interfacial Regions: Ultrathin Oxide Films

    Publication Year: 1978 , Page(s): 294 - 303
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (589 KB)  

    The composition and width of the interfacial region formed between thin thermally-grown oxide films and single-crystal Si substrates were nondestructively characterized by means of x-ray photoelectron spectroscopy. Data obtained from variations in core-level binding energies, from variations in photoelectron line intensities, and from variations in photoelectron linewidths indicate the presence of... View full abstract»

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Aims & Scope

The IBM Journal of Research and Development is a peer-reviewed technical journal, published bimonthly, which features the work of authors in the science, technology and engineering of information systems.

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Meet Our Editors

Editor-in-Chief
Clifford A. Pickover
IBM T. J. Watson Research Center