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- 1. Phys. Rev. B 75, 195208 (2007) , “Supercell and cluster density functional calculations of the thermal stability of the divacancy in germanium”, C. Janke, R. Jones, S. Öberg, and P. R. BriddonLarge vacancy clusters, or voids, formed during crystal growth have been reported in Ge. The divacancy is a precursor to such clusters, and is believed to be stable up to 150 or 180 °C. It is also believed to form in Ge irradiated at room temperature where single vacancies are mobile. Density... (Read more)
- 2. Phys. Rev. B 75, 144103 (2007) , “Multiscale modeling of point defects in Si-Ge(001) quantum wells”, B. Yang and V. K. TewaryA computationally efficient hybrid Green's function (GF) technique is developed for multiscale modeling of point defects in a trilayer lattice system that links seamlessly the length scales from lattice (subnanometers) to continuum (bulk). The model accounts for the discrete structure of the lattice... (Read more)
- 3. Phys. Rev. B 75, 115206 (2007) , “Local-density-functional calculations of the vacancy-oxygen center in Ge”, A. Carvalho, R. Jones, J. Coutinho, V. J. B. Torres, S. Öberg, J. M. Campanera Alsina, M. Shaw, and P. R. BriddonWe carry out a comprehensive density-functional study of the vacancy-oxygen (VO) center in germanium using large H-terminated Ge clusters. The importance of a nonlinear core correction to account for the involvement of the 3d electrons in Ge-O bonds is discussed. We calculate the electrical... (Read more)
- 4. Phys. Rev. B 75, 035309 (2007) , “Role of hydrogen in hydrogen-induced layer exfoliation of germanium”, J. M. Zahler, A. Fontcuberta i Morral, M. J. Griggs, Harry A. Atwater, and Y. J. ChabalThe role of hydrogen in the exfoliation of Ge is studied using cross-sectional transmission electron microscopy, atomic force microscopy, and multiple-internal transmission mode Fourier-transform infrared absorption spectroscopy and compared with the mechanism in silicon. A qualitative model for the... (Read more)
- 5. Appl. Phys. Lett. 89, 152123 (2006) , “Electrical characterization of defects introduced in n-type Ge during indium implantation”, F. D. Auret, P. J. Janse van Rensburg, M. Hayes, J. M. Nel, W. E. Meyer, S. Decoster, V. Matias, and A. VantommeThe authors have employed deep level transient spectroscopy to investigate the defects introduced in n-type Ge during 160 keV indium (In) ion implantation. Our results show that In implantation introduces three prominent electron traps with energy levels at... (Read more)
- 6. Appl. Phys. Lett. 89, 151918 (2006) , “Competition between damage buildup and dynamic annealing in ion implantation into Ge”, M. Posselt, L. Bischoff, D. Grambole, and F. HerrmannChanneling implantation of Ga into Ge is performed at two very different ion fluxes (1012 and 1019 cm2 s1), at two temperatures (room temperature and 250 °C), and at five different fluences. The fluence dependence of the range profiles... (Read more)
- 7. Appl. Phys. Lett. 88, 242110 (2006) , “Electrical characterization of defects introduced during electron beam deposition of Pd Schottky contacts on n-type Ge”, F. D. Auret, W. E. Meyer, S. Coelho, and M. HayesWe have investigated by deep level transient spectroscopy the hole and electron trap defects introduced in n-type Ge during electron beam deposition (EBD) of Pd Schottky contacts. We have also compared the properties of these defects with those introduced in the same material during... (Read more)
- 8. Appl. Phys. Lett. 88, 183506 (2006) , “Deep level transient spectroscopy study of nickel-germanide Schottky barriers on n-type germanium”, E. Simoen, K. Opsomer, C. Claeys, K. Maex, C. Detavernier, R. L. Van Meirhaeghe, S. Forment, and P. ClauwsNickel-germanide Schottky barriers have been made on n-type germanium and evaluated by deep level transient spectroscopy in order to detect possible metal indiffusion during the 30 s rapid thermal annealing (RTA) employed for the germanidation. It is shown that while no electron traps have... (Read more)
- 9. Appl. Phys. Lett. 88, 091919 (2006) , “Calculation of deep carrier traps in a divacancy in germanium crystals”, J. Coutinho, V. J. B. Torres, R. Jones, A. Carvalho, S. berg, P. R. BriddonWe present an ab initio density functional study on the electronic structure and electrical properties of divacancies in Ge. Although suffering essentially different Jahn-Teller distortions when compared to the analogous defect in Si, the relative location of the electrical levels in the gap... (Read more)
- 10. J. Appl. Phys. 100, 044303 (2006) , “Spin relaxation in a germanium nanowire”, S. Patibandla, S. Pramanik, S. Bandyopadhyay, and G. C. TepperWe report experimental study of spin transport in nanowire spin valve structures consisting of three layerscobalt, germanium, and nickel. The spin diffusion length in the Ge is estimated to be about 400 nm at 1.9 K and the corresponding spin relaxation time is about 4 ns. At 100 K, the... (Read more)
- 11. J. Appl. Phys. 100, 033525 (2006) , “Determination of interstitial oxygen concentration in germanium by infrared absorption”, V. V. Litvinov, B. G. Svensson, L. I. Murin, J. L. Lindström, V. P. Markevich, and A. R. PeakerThe intensities of infrared absorption due to the asymmetric stretching vibrations of interstitial oxygen atoms in Ge crystals enriched with 16O and 18O isotopes have been compared with oxygen concentrations determined by means of secondary ion mass spectrometry. For Ge samples... (Read more)
- 12. Phys. Rev. B 74, 155208 (2006) , “Vibrational spectra of vitreous germania from first-principles”, Luigi Giacomazzi, P. Umari, and Alfredo PasquarelloWe report on a first-principles investigation of the structural and vibrational properties of vitreous germania (v-GeO2). Our work focuses on a periodic model structure of 168 atoms, but three smaller models are also studied for comparison. We first carry out a detailed structural... (Read more)
- 13. Phys. Rev. B 73, 235213 (2006) , “Donor-vacancy complexes in Ge: Cluster and supercell calculations”, J. Coutinho, S. Öberg, V. J. B. Torres, M. Barroso, R. Jones, and P. R. BriddonWe present a comprehensive spin-density functional modeling study of the structural and electronic properties of donor-vacancy complexes (PV, AsV, SbV, and BiV) in Ge crystals. Special attention is paid to spurious results which are related to the choice of the boundary... (Read more)
- 14. Phys. Rev. Lett. 23, 581 (1969) , “Electron Spin Resonance in Amorphous Silicon, Germanium, and Silicon Carbide”, M. H. Brodsky and R. S. TitleThe g values, line shapes, and linewidths of the ESR signals from within the bulk of amorphous silicon, germanium, and silicon carbide are found to be similar to those of the electron states observed in the surface regions of the corresponding crystalline forms. Discussion is given in terms of a... (Read more)Ge Si SiC| EPR| Carbon D Germanium Silicon amorphous dangling-bond .inp files: Si/amorphous | last update: Takahide Umeda
- 15. J. Phys. Chem. Solids 24, 1467 (1963) , “Spin and combined resonance on acceptor centres in Ge and Si type crystals—I Paramagnetic resonance in strained and unstrained crystals”, G. L. Bir, E. I. Butikov, G. E. Pikus.A theory of paramagnetic resonance on acceptor centres in deformed and non-deformed Ge and Si type crystals is developed. The splitting of the ground state under the action of the deformation and magnetic field is determined and the probability of transitions between levels is estimated. Using the... (Read more)
- 16. J. Phys. Chem. Solids 8, 490 (1959) , “Spin resonance of deep level impurities in germanium and silicon”, G. W. Ludwig, H. H. Woodbury and R. O. CarlsonElectron spin resonance measurements have been reported for nickel and manganesein germanium.We have been studying several deep level impurities in germanium and silicon be resonance tecniques,but only two system,nickel in germanium and manganese in silicon,will be discussed here. (Read more)
- 17. Solid State Physics 5, 258-319 (1957) , Academic Press, New York (Edited by F. Seitz, D. Turnbull) , “Shallow Impurity States in Silicon and Germanium”, W. KohnI. Introduction (p.258): II. Emprical Properties (p.261): 1. Energy Levels (p.261), a. Ionization Energies, b. Spectra of Excited States, 2. Spin Resonance (p.266), a. Electron Spin Resonance, b. Double Resonance, 3. Static Magnetic Susceptibility (p.271), III. Structure of Donor States (p.271): 4. Conduction Bands of Silicon and Germanium (p.271), a. Silicon, b. Germanium, 5. Effective Mass Theory of Donor States (p.274), a. Single Band Minimum at k=0, b. Several Conduction Band Minima, c. Matrix Elements for Radiative Transitions, 6. Numerical Results and Comparison with Experiments (p.285), a. Energy Levels, b. Wave Functions, 7. Corrections to the Effective Mass Formalism (p.289), a. General Considerations, b. Corrected Wave Functions, c. Comparison with Experiment, IV. Structure of Acceptor States (p.297): 8. Valence Bands of Silicon and Germanium (p.297), a. Silicon, b. Germanium, 9. Effective Mass Equations for Acceptor States (p.300), 10. Approximate Solutions and Comparison with Experiment (p.301) a. Germanium b. Silicon V.Effects of Strains and of Static Electric and Magnetic Fields (p.306): 11. Strains (p.306) a. Donor States, b. Acceptor States, 12. Stark Effect (p.311)
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