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  • 1990-1994  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Multistability of the current-voltage characteristics in doped GaAs-AlAs superlattices (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 65 (1994), S. 1808-1810 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electric-field domain formation in doped semiconductor superlattices leads to sharp discontinuities in the current-voltage (I-V) characteristic. The successive expansion of the high-field region with increasing bias voltage through the periodic heterostructure manifests itself in a regular sequence of stable current branches. The current shows a complex hysteretic behavior. We observe two, three, and more stable current levels for fixed bias voltages. Calculations of the I-V characteristic based on a microscopic model support the experimentally observed multistability. © 1994 American Institue of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.112850
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Oscillatory instability in the heterostructure hot-electron diode (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 59 (1991), S. 1702-1704 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Vertical electrical transport in the heterostructure hot-electron diode is considered theoretically. We present a simple dynamical model which consistently explains the measured S-shaped negative differential conductivity in the current-voltage characteristics. The model predicts a new type of self-sustained 60 GHz voltage oscillations between tunneling and thermionic emission if the sample is driven by a dc voltage source having a resistor in series and a capacitor in parallel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.106223
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Spiking in an activator-inhibitor model for elements with S-shaped negative differential conductivity (1994)
    Springer
    The European physical journal 93 (1994), S. 431-436 
    Details
    ISSN: 1434-6036
    Keywords: 72.20.Ht ; 73.40.Kp ; 05.45.+b
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Self-organized spatio-temporal dynamics of electrical transport is described by a simple noncubic activator-inhibitor system derived for layered semiconductor structures. The model exhibits a novel mode of self-sustained oscillations due to current filaments switching on and off (spiking) which may be periodic or chaotic. Additionally, we obtain complex multifilamentary spatio-temporal patterns. As such phenomena have been observed in various devices exhibiting S-shaped negative differential conductivity, our model is suggested to describe a generic mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01314246
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    Paper (German National Licenses)
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