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Evidence of palladium-defect pairing in intrinsic germanium |
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| Authors: | H Timmers W Kemp A P Byrne M C Ridgway R Vianden P Kessler M Steffens |
| Institution: | 1. School of Physical, Environmental and Mathematical Sciences, University of New South Wales at the Australian Defence Force Academy, Canberra, ACT, 2600, Australia 2. Research School of Physics and Engineering, Australian National University, Canberra, ACT, 0200, Australia 3. Helmholtz-Institut für Strahlen- und Kernphysik, 53115, Bonn, Germany |
| Abstract: | Time Differential Perturbed Angular Correlation measurements were performed in intrinsic germanium with the 100Pd/100Rh probe. The probe was produced via 92Zr(12C, 4n)100Pd and recoil-implanted into samples. Parallel measurements with the 111In/111Cd probe confirmed the quality of the germanium studied. The measurements with the 100Pd/100Rh probe show a modulation pattern in the ratio function with a quadrupole interaction frequency of 8.3(2) Mrad/s. The pattern depends on sample orientation and it is most pronounced after annealing at 500°C. After annealing at 700°C the effect vanishes due to strong damping of the ratio function. The pattern may be caused, similar to what has been observed for highly doped n-type silicon, by the pairing of the Pd-atom with a vacancy located in the < 111 > direction. The disappearance of the pattern would indicate the dissociation of this pair. Pair formation and dissociation may be relevant to palladium-induced-crystallization processing of germanium. |
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