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  • 1990-1994  (2)
  • 62.50.+p  (1)
  • 79.60.Cn  (1)
  • 78.20.Ls
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Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Resonant photoemission in highly localized versus weakly localized solids (1994)
    Springer
    The European physical journal 94 (1994), S. 1-2 
    Details
    ISSN: 1434-6036
    Keywords: 79.60.Cn ; 78.70.Dm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report on comparative study of angle-resolved photoelectron spectra of Ni metal and CeGd at theM III andN IV,V soft-x-ray absorption threshold, respectively. OnM III resonance, the valence-band photoemission (PE) intensity of Ni follows a cos2-behavior, while the intensity of the 6-eV satellite is independent of the angle of emission relative to the E-vector of the incoming beam. On the other hand, the 4f Ce PE signal behaves ∝ cos2 onN IV,V resonance. This clearly shows that the resonant enhancement of the 6-eV PE satellite of Ni is mainly caused by an incoherent Auger decay and cannot be described as a resonant PE process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01307645
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    High-pressure phases of CuI studied by129I-Mössbauer spectroscopy (1992)
    Springer
    Hyperfine interactions 72 (1992), S. 251-257 
    Details
    ISSN: 1572-9540
    Keywords: 64.70 Kb ; 76.80.+7 ; 62.50.+p
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The results of an129I-Mössbauer study of the high-pressure phases of CuI at 4.2 K and for external pressures up to 71 kbar are reported. The isomer shiftS and the electric quadrupole interactionE q are found to undergo larges discontinuities at the crystallographic phase-transition pressures of ≅18 kbar from zinc-blence to rhombohedral structure and at ≅46 kbar from rhombohedral to tetragonal. The pressure coefficients of these hyperfine parameters are significantly different for the three phases (zinc-blende; rhombohedral; tetragonal) dS/dP=−3.3; =+1.5; =2.5×10−3 mm/s/kbar; dE q/dP=0.0; =−0.92;=+0.31 Mc/s/kbar. These results cannot be explained in terms of a simple molecular-orbital picture; instead, they reflect pressure-induced variations of the halogen-p/metal-d hybridization in the valence bands of the various phases of CuI.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02398869
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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