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  • 1
    Electronic Resource
    Electronic Resource
    Study of single-particle poles in shell-model reaction theory
    Amsterdam : Elsevier
    Nuclear Physics, Section A 139 (1969), S. 385-406 
    Details
    ISSN: 0375-9474
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9474(69)91117-8
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    On the factorization of the wave function and the green function in the region of isolated poles of the S-function
    Amsterdam : Elsevier
    Nuclear Physics, Section A 104 (1967), S. 564-576 
    Details
    ISSN: 0375-9474
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9474(67)90474-5
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Photodisintegration of the ^1^6O nucleus
    Amsterdam : Elsevier
    Nuclear Physics, Section A 103 (1967), S. 450-460 
    Details
    ISSN: 0375-9474
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9474(67)90264-3
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Ein blutdrucksteigerndes Prinzip in der Glandula submaxillaris der Ratte (1969)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 264 (1969), S. 257-258 
    Details
    ISSN: 1432-1912
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02431453
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Study of the single-particle energy spectrum of disordered systems (1986)
    Springer
    The European physical journal 64 (1986), S. 273-287 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The study of the properties of real strongly disordered solids whose energy spectrum and its relation with the atomic structure was investigated in the foregoing paper is continued. The state vectors belonging to the point spectrum are shown to be localized around a region of strong distortion of the local structure which is embedded in a weakly disordered substitution structure connectedly extending over the complete volume of the system. The state vectors of the continuous spectrum spatially extending over the infinite substitution structure are normalizable according to a δ-function of the energy. Near isolated sharp resonances and in the interior space region around the starter the energy and the space dependence of the state vector is shown to be factorizable. The resonance widths and the spectral strengths are studied as functions of the energy. The spectral strength has a discontinuity at the mobility edges. The obtained total density of states (TDS) has a square root behaviour on both sides of the mobility edges. This pseudogap of vanishing width in the TDS at the mobility edges is in contrast to the familiar opinion that the TDS passes the mobility edges as a smooth continuous function. This behaviour of the TDS yields an argument against the existence of a minimum metallic conductivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01303598
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  • 6
    Electronic Resource
    Electronic Resource
    Study of the single-particle energy spectrum of disordered systems (1986)
    Springer
    The European physical journal 64 (1986), S. 259-271 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this paper the recursion method is applied to the study of the energy spectrum of strongly disordered systems. The real spatial atomic configuration of amorphous semiconductors is the foundation the theory is based on. The presence of partial disorder (short-range order) is shown to be the reason for the existence of a mobility edge whose position is determined by the asymptotic behaviour of the recursion coefficients of a weakly disordered substitution structure. An analytical expression for the local density of states (LDS) is found consisting of contributions from a point and a continuous spectrum. Strong distortions of the local atomic structure are shown to be the origin of localized states. The spectral strength is defined as the weight factor a localized level has in the LDS. The concept of local resonance states is introduced into the theory of disordered solids. Resonances put structure on the LDS of the continuum. Near isolated sharp resonances an analytical representation of the LDS is found. Both localized levels, spectral strengths, resonance energies and widths, and LDS's are numerically calculated for simple models. The theory is applied tod-electrons on a fcc-lattice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01303597
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  • 7
    Electronic Resource
    Electronic Resource
    Study of the single-particle energy spectrum of disordered systems: III. The two-band case (1987)
    Springer
    The European physical journal 66 (1987), S. 7-20 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A previous investigation of the energy spectrum of strongly disordered systems with the help of the recursion method is generalized to the two-band case. The real atomic structure of the considered systems is taken into consideration. The presence of short-range order within the system is shown to be the reason for the existence of extended states and of mobility edges. Typical fields of application are doped crystalline and amorphous Silicon as well as Germanium. For the two-band case a number of results is obtained: Mobility edges and their physical interpretation, localized and extended states as well as the structural conditions for their coexistence, analytical representation of the local density of states and of the state vectors, resonances and the general form of the total density of states (TDS) in the complete energy region. The spectral strength as function of the energy is shown to be discontinuous at the mobility edges. The TDS has a square root behaviour on both sides of the mobility edges what leads to a pseudogap of vanishing width at these points. This edge behaviour is shown to be related with the divergency the localization length of a state has as the state energy tends to the mobility edges. Model calculations are carried out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01312757
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    Paper (German National Licenses)
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