By Topic

IBM Journal of Research and Development

Issue 3 • Date July 1964

Filter Results

Displaying Results 1 - 25 of 27
  • Foreword

    Publication Year: 1964 , Page(s): 214
    Save to Project icon | PDF file iconPDF (175 KB)  
    Freely Available from IEEE
  • Crystal Chemistry and Band Structures of the Group V Semimetals and the IV–VI Semiconductors

    Publication Year: 1964 , Page(s): 215 - 227
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (760 KB)  

    Some simple facts regarding crystal structures and semiconducting vs semimetallic behavior of the Group V elements and the related Group IV–VI compounds are summarized. The simple chemical interpretation of these facts (based on three perpendicular p-bonding orbitals) is reviewed. This picture is reinterpreted in terms of a simple pseudopotential band model, which provides a deeper basis fo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Effective g-factor of Holes in Bismuth

    Publication Year: 1964 , Page(s): 228 - 231
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (330 KB)  

    Measurements have been made of the Shubnikov-de Haas effect in bismuth at 1.5°K and fields up to 88 kG. The effect consists of oscillations in the resistance as a function of magnetic field. The oscillations result from the quantization of the transverse energy of the carriers in a magnetic field. From the positions of the oscillations, one can obtain information concerning the band structu... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • High Field Galvanomagnetic Effects in Bismuth

    Publication Year: 1964 , Page(s): 232
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (223 KB)  

    Spin splitting of the Landau levels due to the holes in bismuth has been observed in pulsed fields up to 175 kilogauss at 1.2°K. The effect was seen in Shubnikovde Haas oscillations. The oscillatory component of the transverse magnetoresistance R versus the magnetic field H is shown in Fig. 1 with J parallel to the bisectrix axis and H in the binary-trigonal plane. θ is the angle bet... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Piezo-Resistance and Piezo-Hall Effect in Bismuth

    Publication Year: 1964 , Page(s): 233
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (224 KB)  

    The electrical resistivity and Hall coefficient in single crystals of bismuth have been measured as a function of uniaxial stress along the trigonal axis at 4.2°, 77°, and 295°K. The data are analyzed in terms of a two band model to determine the deformation potential components E1 and E2 given by δE0 = E1(ε... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Phonon Dispersion Curves in Bismuth

    Publication Year: 1964 , Page(s): 234 - 240
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (497 KB)  

    Dispersion curves for phonons propagating in the trigonal direction in bismuth at room temperature and at 75°K have been obtained in a neutron inelastic scattering experiment. Observed frequencies (units 1013 rad/sec) at 75°K are as follows: at the zone center, ωTO = 1.40 ± 0.02, ωLO = 1.89 ± 0.02; at the zone boundary in the t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Transport Properties and Band Structure in Bismuth, Antimony and their Alloys

    Publication Year: 1964 , Page(s): 241 - 246
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (417 KB)  

    We shall interpret the galvanomagnetic properties of bismuth, antimony and the Bi-Sb alloy system in terms of bands of carriers known to exist in the pure semimetals. In our interpretation, the new carriers, presumed holes, observed by several investigators in antimony must have slightly warped oblate ellipsoidal energy surfaces to account for the galvanomagnetic data of Juretschke et al, rather t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Cyclotron Resonance and the Fermi Surface of Antimony

    Publication Year: 1964 , Page(s): 247 - 252
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (439 KB)  

    A new series of cyclotron resonance experiments has been made on antimony which gave extended information on electron and hole cyclotron masses. Experiments were carried out with the magnetic field in the principal crystal planes of antimony at 1.5°K and with 35 Gc/sec microwave radiation. The magnetic field of cyclotron resonance in certain regions was dependent upon the angle of tip of th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Growth and Transport Properties of Bi-Sb Single Crystal Alloys

    Publication Year: 1964 , Page(s): 253 - 254
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (258 KB)  

    Since the details of this investigation are to be published elsewhere,1,2 it is our purpose to only briefly summarize the results here. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Energy Band Structure of Graphite

    Publication Year: 1964 , Page(s): 255 - 261
    Cited by:  Papers (1)  |  Patents (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (463 KB)  

    The energy band structure of graphite is described in the region of the Fermi surfaces by the Slonczewski-Weiss model. The electron and hole Fermi surfaces are highly elongated and are aligned along the six Brillouin zone edges which are parallel to the trigonal axis of the crystal. The energy is a non-parabolic function of wavenumber and the Fermi surfaces are not ellipsoids. Galvanomagnetic, de ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Fermi Surface of Graphite

    Publication Year: 1964 , Page(s): 262 - 267
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (459 KB)  

    Recent magnetoreflection measurements in pyrolytic graphite have been interpreted using the magnetic energy levels obtained from the McClure-Inoue secular equation and the appropriate selection rules for interband transitions. Combining these results with those of the de Haas-van Alphen effect, the band parameters of the Slonczewski-Weiss model have been evaluated and the Fermi surface determined.... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Change in Fermi Surfaces of Graphite by Dilute Acceptor Doping

    Publication Year: 1964 , Page(s): 268 - 273
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (385 KB)  

    The effect of doping graphite single crystals with the acceptor boron was studied in the dilute range from ≲0.1 ppm to 0.5% by measurements of the Hall effect and de Haas-van Alphen effect. The transition from a mixed electron and hole conduction in the narrow band overlap region (0.035 eV) to that of a single hole conduction produces a peak in the Hall coefficient that shifts to a lower bo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • STB Model and Transport Properties of Pyrolytic Graphites

    Publication Year: 1964 , Page(s): 274 - 275
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (240 KB)  

    Structure and texture of pyrolytic graphites (PG) make it unlikely that the three dimensional electron-energy bands of ideal graphite would provide an adequate basis for a discussion of electron transport processes over a broad temperature range.1 We propose to demonstrate that a coherent description of PG layer-plane phenomena can be based on a parabolic two band system with cylindrica... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Alfvén Wave Propagation in Bismuth: Quantum Oscillations of the Fermi Surface

    Publication Year: 1964 , Page(s): 276 - 283
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (507 KB)  

    Alfvén wave propagation in single crystal bismuth has been studied as a function of magnetic field to 105 kilogauss for frequencies between 13 and 18 kMc/sec. Small deviations from a linear dependence of wave velocity on magnetic field are found and are interpreted as quantum oscillations in the mass density of carriers. Theory and experiment are compared for the magnetic field along a bise... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Infrared Reflectivity of Bismuth in the Quantum Limit

    Publication Year: 1964 , Page(s): 284
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (183 KB)  

    The infrared reflectivity of Bi in a magnetic field has been investigated between 100 cm−1 and 400 cm−1 in the quantum limit (cyclotron energy comparable to Fermi energy). A sharp decrease in the reflectivity1 occurs at that field at which transitions first become possible between the lowest two Landau levels of the conduction band. Calculations... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Acoustic Plasma Waves in Semimetals

    Publication Year: 1964 , Page(s): 285 - 290
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (467 KB)  

    The acoustic plasma wave suffers severe Landau damping for equal-temperature carriers obeying Boltzmann statistics, but can be relatively weakly Landau damped in semimetals if in the propagation direction the Fermi velocities and masses of the two carriers are very unequal. Only the carriers with the smaller Fermi velocity are important in producing collision damping since the other carriers store... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Effect of the Self-Magnetic Field on Galvanomagnetic Effects in Bismuth

    Publication Year: 1964 , Page(s): 291 - 294
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (326 KB)  

    The magnetoresistance and the Hall coefficient for pure bismuth at 77°K have been calculated to the second order in the self-magnetic field, i.e. current density. The calculations show that the observed dependence of the galvanomagnetic effects on the current density at high currents can be qualitatively explained by the self-magnetic field. However, to obtain quantitative agreement it is n... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Non-Ohmic Conduction in Bismuth

    Publication Year: 1964 , Page(s): 295 - 298
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (299 KB)  

    The experimentally determined I-V characteristics at large currents at 4.2°, 77°, and 300°K have been found to be nonlinear in both single crystal and wire samples of bismuth. A theory has been formulated which includes self-magnetoresistance, a redistribution of carriers (pinch) and bimolecular bulk and surface recombination. Very little information exists, either experimenta... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Linear and Nonlinear Methods in Pattern Classification

    Publication Year: 1964 , Page(s): 299 - 307
    Cited by:  Papers (9)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (605 KB)  

    The problem of pattern classification has two highly interactive aspects: (1) the selection of numerical measurements to ‘represent’ the patterns, and (2) the specification of an algorithm to identify patterns, based upon the numerical values of these measurements. The present paper presents the mathematical framework for one attack upon these problems and gives results obtained in s... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Magnetically Controlled Variable Logic

    Publication Year: 1964 , Page(s): 308 - 317
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (556 KB)  

    Magnetically controlled multipurpose logic provides a great flexibility and compactness. A matrix consisting of 2n saturable magnetic elements for n variable inputs is controlled by an adjacent magnetic pattern recorded on a magnetic medium, which determines the logical function to be performed. Since 22n magnetic patterns enable the performance of 22n logical func... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A New Digital Method of Bit Synchronization Derived from an Analog Theory

    Publication Year: 1964 , Page(s): 318 - 328
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (574 KB)  

    This paper discusses a new method of bit synchronization derived from an analog theory to solve the problems involved in receiving a serial train of bits from a remote data communication source. Test results show that accurate frequency and phase information can be derived from the received serial data. The Analog Derived Clock to accomplish this bit synchronization is described, and applications ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Simulation of a Hydraulic Actuator

    Publication Year: 1964 , Page(s): 329 - 334
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (439 KB)  

    A simple mathematical model of a hydraulic actuator is formulated, and the differential equations describing the model are derived. Experimental data and a computational solution of the model are determined. Results correspond favorably with oscilloscope velocity traces; hence the model could serve a useful purpose in mechanical design. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Note on the Resonant Modes and Spatial Coherency of a Fabry-Perot Maser Interferometer

    Publication Year: 1964 , Page(s): 335 - 337
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (326 KB)  

    This communication has considered the case of a Fabry-Perot cavity with light impinging on one end while the field distribution on the other end is observed. It has been shown that if one starts with a wave that can be expanded into the modes of the integral operator, and if the medium in the cavity is passive, more than one mode would be observed at the other end although the amplitude of the dom... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Analysis of a Nondegenerate Two-Photon Giant-Pulse Laser

    Publication Year: 1964 , Page(s): 338 - 340
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (308 KB)  

    In a recent article1 to which we shall refer as [S&B], a two-photon laser was proposed and analyzed. This device consists of a cavity resonant at frequency vA and containing ions of type B with an inverted population NB/V between levels separated by an energy difference hvB such that vB = 2vA ; it is necessary that the system no... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • IBM Technical Papers Published Recently in Other Journals

    Publication Year: 1964 , Page(s): 341 - 359
    Save to Project icon | PDF file iconPDF (1122 KB)  
    Freely Available from IEEE

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.

Full Aims & Scope

Meet Our Editors

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