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  • 1
    Electronic Resource
    Electronic Resource
    Analysis of the recombination velocity and of the electron beam induced current and cathodoluminescence contrasts at a dislocation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 4997-5003 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A self-consistent calculation of the barrier height and of the effective recombination velocity at a dislocation has been performed. The procedure has taken account of the bending of the minority carrier quasi-Fermi level across the dislocation space-charge region and in the quasineutral region and of the nonrigid displacement of the dislocation energy levels. The dislocation energy states are considered to be uniformly distributed in a half-filled band. The continuity equation around the dislocation has been solved for the case of a low-level electron beam injection and the electron beam induced current and cathodoluminescence contrasts at the dislocation have been derived.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.350599
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  • 2
    Electronic Resource
    Electronic Resource
    Strong coupling theory of superconducting fullerides near the Mott transition
    Amsterdam : Elsevier
    Physica C: Superconductivity and its applications 235-240 (1994), S. 2391-2392 
    Details
    ISSN: 0921-4534
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0921-4534(94)92416-3
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  • 3
    Electronic Resource
    Electronic Resource
    On the secondary ionic emission of polyatomic ions from C"6"0 samples
    Amsterdam : Elsevier
    Nuclear Inst. and Methods in Physics Research, B 78 (1993), S. 310-313 
    Details
    ISSN: 0168-583X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-583X(93)95817-O
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  • 4
    Electronic Resource
    Electronic Resource
    Many-electron singularity in aggregate X-ray line and photoelectron spectra (1992)
    Springer
    The European physical journal 24 (1992), S. 235-239 
    Details
    ISSN: 1434-6079
    Keywords: 36.40. + d ; 78.70.Dm ; 36.20. Kd
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is generally admitted that the many-electron effects govern the shape of the discrete X-ray line and photoemission spectra. This phenomenon has been studied in bulk metals (Mahan, Nozières and de Dominicis model) where it is characterized by two effects: the Anderson orthogonality between the initial and final ground states and the $$|E|^{\alpha _H - 1} $$ spectrum behaviour, whereE is the emitted particle energy defect (with respect to the one-electron energy) and α H (with 0〈α H 〈1) and exponent related to the phase shifts δ at the Fermi level due to the localised hole potential. We study these two effects in limited media (closed loop shape withN=10 to 30 atoms). We observe that, asN increases, the ground state overlap tends toward zero in a way which is surprisingly close to the Anderson $$N^{ - \alpha _H /2} $$ behaviour. TheE spectra are also obtained. They are very different from the bulk which will lead to asymmetry parameters smaller for aggregates than for the bulk. A discussion of the experimental results is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01425747
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  • 5
    Electronic Resource
    Electronic Resource
    All-valence electron investigation of Cn binding energies (n≤60) (1993)
    Springer
    The European physical journal 26 (1993), S. 270-272 
    Details
    ISSN: 1434-6079
    Keywords: 3640 + d ; 61.50Lt ; 31.20Tz
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present a theoretical study of the electronic properties of some Cn aggregates : C3, C20, C24, C28, C60 ; C3 is linear, the others are polyhedrons. Our calculation includes all the valence electrons. A one-electron description is first developed, then we include intraatomic correlations by using a second order perturbative treatment introduced by J. Friedel for sp v hybridized systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01425687
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  • 6
    Electronic Resource
    Electronic Resource
    Size effect in3He n aggregates. A Gutzwiller approach (1991)
    Springer
    The European physical journal 20 (1991), S. 273-276 
    Details
    ISSN: 1434-6079
    Keywords: 36.40. +d ; 31.20.Tz ; 67.50. -b
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Hubbard hamiltonian (where only intraatomic correlations between fermions are taken into account) is particularly well suited for the description of3He systems. It has already been used in the description of point defects (such as spin polarons) in the bulk. The variational Gutzwiller method is one of the most useful way for treating the Hubbard hamiltonian. This technique has been applied with success by Vollhardt to the bulk. We apply it here to aggregates. Our main results are the following: 1 existence of a critical size,N c , above which3He n begin to be stable; 2 calculation of the magnetic susceptibility. In this part two cases are studied: low magnetic field where only the density of states, σ(E F), at the Fermi level is needed and high magnetic field where the whole density of states is needed. The results are compared with other theoretical calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01543990
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  • 7
    Electronic Resource
    Electronic Resource
    Experimental (LMIS) and theoretical study of Si n Au m p+ and Ge n Au m p+ (1991)
    Springer
    The European physical journal 20 (1991), S. 17-19 
    Details
    ISSN: 1434-6079
    Keywords: 36.40. + d ; 79.00
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In a first part, we present experimental results on Si n Au m p+ and Ge n Au m /p+ produced by the Liquid Metal Ion Source methods (LMIS). In these experiments the liquid tips are SiAu and GeAu eutectic alloys. We compare our results with LMIS experiments made on pure liquid tips and also with data given in the literature. Among the results, we note that GeAu m + exhibit an interesting alternating behaviour. In a second part, we give a quantum mechanical description of Si m p+ properties. In the range 20≲n≲40 these ions show a Δn=6 periodic behaviour. Such an effect is also observed by LMIS on Ge n Emphasis〉3+ and Sn n + aggregates. Our geometries are fragment of Zintl phase lattices (formula K8Si46 or K8Ge46). In these lattices the elementary cell is a regular array of 5-atom and 6-atom rings and the studied fragments have an integer number of rings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01543927
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