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Experimental Observation of Intrinsic Localized Modes in Germanium

  • Juan F. R. ArchillaEmail author
  • Sergio M. M. Coelho
  • F. Danie Auret
  • Cloud Nyamhere
  • Vladimir I. Dubinko
  • Vladimir Hizhnyakov
Chapter
Part of the Springer Series in Materials Science book series (SSMATERIALS, volume 221)

Abstract

Deep level transient spectroscopy shows that defects created by alpha irradiation of germanium are annealed by low energy plasma ions up to a depth of several thousand lattice units. The plasma ions have energies of 2–8 eV and therefore can deliver energies of the order of a few eV to the germanium atoms. The most abundant defect is identified as the E-center, a complex of the dopant antimony and a vacancy with an annealing energy of 1.3 eV as determined by our measurements. The inductively coupled plasma has a very low density and a very low flux of ions. This implies that the ion impacts are almost isolated both in time and at the surface of the semiconductor. We conclude that energy of the order of an eV is able to travel a large distance in germanium in a localized way and is delivered to the defects effectively. The most likely candidates are vibrational nonlinear wave packets known as intrinsic localized modes, which exist for a limited range of energies. This property is coherent with the fact that more energetic ions are less efficient at producing the annealing effect.

Keywords

Inductively Couple Plasma Capture Cross Section Deep Level Transient Spectroscopy Lattice Unit Diamond Structure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The authors were funded by MICINN, project FIS2008-04848; the South African National Research Foundation and the European Regional Development Fund, Centre of Excellence Mesosystems: Theory and Applications. JFRA and VD acknowledges the Physics Institute in Tartu for their hospitality.

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Juan F. R. Archilla
    • 1
    Email author
  • Sergio M. M. Coelho
    • 2
  • F. Danie Auret
    • 2
  • Cloud Nyamhere
    • 3
  • Vladimir I. Dubinko
    • 4
  • Vladimir Hizhnyakov
    • 5
  1. 1.Group of Nonlinear PhysicsDepartamento de Física Aplicada I, Universidad de SevillaSevillaSpain
  2. 2.Department of PhysicsUniversity of PretoriaPretoriaSouth Africa
  3. 3.Physics DepartmentMidlands State UniversityGweruZimbabwe
  4. 4.NSC Kharkov Institute of Physics and TechnologyKharkovUkraine
  5. 5.Institute of Physics, University of TartuTartuEstonia

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