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Browsing Research Articles (Physics) by Issue Date

Now showing items 1-20 of 109

Electrical characterization of vapor-phase-grown single-crystal ZnO

Auret, F.D. (Francois Danie); Goodman, S.A.; Legodi, M.J.; Meyer, W.E. (Walter Ernst); Look, D.C. (American Institute of Physics, 2002-02-25)

Gold Schottky-barrier diodes ~SBDs! were fabricated on vapor-phase-grown single-crystal ZnO. Deep-level transient spectroscopy, using these SBDs, revealed the presence of four electron traps, the major two having levels ...
An investigation of green iridescence on the mollusc Patella granatina

Brink, D.J.; Van den Berg, N.G. (American Institute of Physics, 2005-01)

In this paper we investigate the relatively rare phenomenon of iridescence on the outer surface of seashells (not the well known pearly inner surfaces). Using reflection spectroscopy and scanning electron microscopy we ...
Single- and double-island ferromagnetic single-electron transistors

Barnas, J.; Weymann, I.; Wisniewska, J.; Kowalik, M.; Kunert, Herbert W. (Elsevier, 2006)

Electronic transport in a ferromagnetic single-electron transistor has been considered theoretically in the sequential tunneling regime. The device consists of two external leads and one or two islands as the central part, ...
Effect of time reversal symmetry on states of quasiparticles in crystals

Kunert, Herbert W. (American Institute of Physics, 2006)

The problem of additional time reversal (TR) degeneracy and the transformation properties of ''time reversed' wave functions are investigated. In crystals the one electron Hamiltonian is invariant with respect to a space ...
Characterization of defects created in Cz and epitaxial Si doped with Ga or B using Laplace-DLTS

Nyamhere, Cloud; Deenapanray, P.N.K.; Auret, F.D. (Francois Danie); Farlow, F.C. (Elsevier, 2006)

We have measured the electrical and annealing properties of defects created in epitaxial and Czochralski-grown Si doped with either B or Ga by electron irradiation using both conventional and Laplace deep level transient ...
High-resolution DLTS of vacancy–donor pairs in P-, As- and Sb-doped silicon

Auret, F.D. (Francois Danie); Peaker, A.R.; Markevich, V.P.; Dobaczewski, L.; Gwilliam, R.M. (Elsevier, 2006-04)

We report results from an experiment designed to characterize, by high-resolution (Laplace) DLTS, the electronic properties of electron radiation induced E-centers in Si associated with P, Sb and As. Four sets of samples ...
Quantum entanglement, spin-1/2 and the Stern–Gerlach experiment

Roston, G.B.; Casas, Montserrat; Plastino, Angel Ricardo (Angelo) (American Institute of Physics, 2006-06)

Basic aspects of quantum entanglement are illustrated in connection with the two-component wavefunction description of spin-1/2 particles. In particular, the time evolution of entanglement in the Stern–Gerlach experiment ...
Two particles in a double well : illustrating the connection between entanglement and the speed of quantum evolution

Curilef, Sergio; Zander, Claudia; Plastino, Angel Ricardo (Angelo) (American Institute of Physics, 2006-09)

The connection between entanglement and the speed of quantum evolution (as measured by the time needed to reach an orthogonal state) is discussed in the case of two quantum particles moving in a one-dimensional double well. ...
Fisher info and thermodynamics’ first law

Plastino, Angel Ricardo (Angelo); Soffer, B.H. (Elsevier, 2006-09)

We show, starting from first principles, that thermodynamics’ first law can be microscopically obtained for Fisher's information measure without need of invoking the adiabatic theorem. Further, it is proved that enforcing ...
Improving the convergence of an iterative algorithm proposed by Waxman

Berger, W.A.; Miller, H.G. (American Institute of Physics, 2006-11-10)

In an iterative algorithm recently proposed by Waxman for solving eigenvalue problems, we point out that the convergence rate may be improved. For many non-singular symmetric potentials which vanish asymptotically, a simple ...
Generalized thermostatistics and Bose–Einstein condensation

Miller, H.G.; Khanna, F.C.; Teshima, R.; Plastino, Angel Ricardo (Angelo) (Elsevier, 2006-12)

Analytical expressions for Bose–Einstein condensation of an ideal Bose gas analyzed within the strictures of nonextensive, generalized thermostatistics are here obtained.
A study of amorphization energies in silicon for different implantation parameters

Friedland, Erich Karl Helmuth (Elsevier, 2007-03)

Please open article to read abstract
Entanglement and the speed of evolution of multi-partite quantum systems

Zander, Claudia; Plastino, Angel Ricardo (Angelo); Casas, Montserrat (American Institute of Physics, 2007-03-16)

There exists an interesting relationship between entanglement and the time evolution of composite quantum systems: quantum entanglement enhances the 'speed' of evolution of certain quantum states, as measured by the time ...
Electrical characterization of defects in heavy-ion implanted n-type Ge

Auret, F.D. (Francois Danie); Janse van Rensburg, P.J.; Hayes, M.; Nel, Jackie M. (Jacqueline Margot); Meyer, W.E. (Walter Ernst); Decoster, S.; Matias, V.S.; Vantomme, A.; Smeets, D.; Coelho, S.M.M. (Elsevier, 2007-04)

Please open article to read abstract
Unusual coloration in scarabaeid beetles

Brink, D.J.; Van den Berg, N.G.; Prinsloo, Linda C.; Hodgkinson, I.J. (American Institute of Physics, 2007-04-07)

In this paper we investigate the reflection of circularly polarized light from the exocuticle of the scarabaeid beetle Gymnopleurus virens. Reflection spectra are deeply modulated, exhibiting a number of relatively narrow ...
Stability of ZnO{0 0 0 1} against low energy ion bombardment

Sulyok, A.; Menyhard, M.; Malherbe, J.B. (Elsevier, 2007-04-15)

The steady-state surface compositions of the polar (O and Zn terminated) faces of ZnO{0 0 0 1} produced by low energy (0.3–2 keV) Ar+ ion bombardment were studied by Auger electron spectroscopy and electron energy loss ...
A modified version of the Waxman algorithm

Berger, W.A.; Miller, H.G. (American Institute of Physics, 2007-05)

The iterative algorithm recently proposed by Waxman for solving eigenvalue problems, which relies on the method of moments, has been modified to improve its convergence considerably without sacrificing its benefits or ...
Exploring the development of conceptual understanding through structured problem-solving in Physics

Gaigher, Estelle; Rogan, John M.; Braun, Max Willi Hermann (Taylor & Francis, 2007-07)

A study on the effect of a structured problem-solving strategy on problem-solving skills and conceptual understanding of physics was undertaken with 189 students in 16 disadvantaged South African schools. This paper focuses ...
Hyraceum, the fossilized metabolic product of rock hyraxes (Procavia capensis), shows GABA-benzodiazepine receptor affinity

Olsen, Andreas; Prinsloo, Linda C.; Scott, Louis; Jager, Anna K. (Academy of Science of South Africa, 2007-11)
Electronic properties of defects in pulsed-laser deposition grown ZnO with levels at 300 and 370 meV below the conduction band

Auret, F.D. (Francois Danie); Meyer, W.E. (Walter Ernst); Janse van Rensburg, P.J.; Hayes, M.; Nel, Jackie M. (Jacqueline Margot); Von Wenckstern, H.; Schmidt, H.; Biehne, G.; Hochmuth, H.; Lorenz, M.; Grundmann, M. (Elsevier, 2007-12)

Please refer to abstract in article

Now showing items 1-20 of 109

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