Direct observation by resonant tunneling of the B+ level in a delta-doped silicon barrierWe observe a resonance in the conductance of silicon tunneling devices with a delta-doped barrier. The position of the resonance indicates that it arises from tunneling through the B+ state of the…J. Caro, I. D. Vink, G. D. J. Smit et al.·Sep 5, 2003SaveLearn
Conductance distribution in nanometer-sized semiconductor devices due to dopant statisticsWe show that individual dopant atoms dominate the transport characteristics of nanometer sized devices, by investigating metal semiconductor diodes down to 15 nm diameter. Room temperature…G. D. J. Smit, S. Rogge, J. Caro et al.·Sep 5, 2003SaveLearn
Group theoretical analysis of double acceptors in a magnetic field: identification of the Si:B+ ground stateA boron impurity in silicon binding an extra hole is known to have only one bound state at an energy of just below 2 meV. The nature of the Si:B+ ground state is however not well established. We…G. D. J. Smit, S. Rogge, J. Caro et al.·Sep 5, 2003SaveLearn
Gate-induced ionization of single dopant atomsGate-induced wave function manipulation of a single dopant atom is a possible basis of atomic scale electronics. From this perspective, we analyzed the effect of a small nearby gate on a single…G. D. J. Smit, S. Rogge, J. Caro et al.·Sep 5, 2003SaveLearn
Localization of Two-Component Bose-Einstein Condensates in Optical LatticesWe reveal underlying principles of nonlinear localization of a two-component Bose-Einstein condensate loaded into a one-dimensional optical lattice. Our theory shows that spin-dependent optical…Elena A. Ostrovskaya, Yuri S. Kivshar·Sep 5, 2003SaveLearn
Kohn Anomaly in MgB2 by Inelastic X-Ray ScatteringWe study phonons in MgB2 using inelastic x-ray scattering (1.6 and 6 meV resolution). Our measurements show excellent agreement with theory for the dispersion and line-width: we clearly observe the…A. Q. R. Baron, H. Uchiyama, Y. Tanaka et al.·Sep 5, 2003SaveLearn
Anlaytic mean-field Hall crystal solution at nu=1/3: composite fermion like sub-bands and correlation effectsAn analytic solution of the Hartree-Fock problem for a 2DEG at filling 1/3 and half an electron per unit cell is presented. The Coulomb interaction dynamically breaks the first Landau level in three…Alejandro Cabo, Francisco Claro·Sep 5, 2003SaveLearn
Mott transition from a diluted exciton gas to a dense electron-hole plasma in a single V-shaped quantum wireWe report on the study of many-body interactions in a single high quality V-shaped quantum wire by means of continuous and time-resolved microphotoluminescence. The transition from a weakly…Thierry Guillet, Roger Grousson, Valia Voliotis et al.·Sep 5, 2003SaveLearn
Local disorder and optical properties in V-shaped quantum wires : towards one-dimensional exciton systemsThe exciton localization is studied in GaAs/GaAlAs V-shaped quantum wires (QWRs) by high spatial resolution spectroscopy. Scanning optical imaging of different generations of samples shows that the…Thierry Guillet, Roger Grousson, Valia Voliotis et al.·Sep 5, 2003SaveLearn
Monte Carlo Modeling of Spin FETs Controlled by Spin-Orbit InteractionA method for Monte Carlo simulation of 2D spin-polarized electron transport in III-V semiconductor heterojunction FETs is presented. In the simulation, the dynamics of the electrons in coordinate and…Min Shen, Semion Saikin, Ming-C. Cheng et al.·Sep 4, 2003SaveLearn
Variational derivation of density functional theoryIt is shown here that Kohn-Sham equations cannot be derived from Hohenberg-Kohn theory without an additional postulate. Assuming that a functional derivative with respect to total electron density…R. K. Nesbet·Sep 4, 2003SaveLearn
Universal Thermodynamics of Degenerate Quantum Gases in the Unitarity LimitWe perform a systematic study of the thermodynamics of quantum gases in the unitarity limit. Our study makes use of a "Universality Hypothesis" for the relevant energy scales of a many-body…Tin-Lun Ho·Sep 4, 2003SaveLearn
Glass transition in the charge density wave system K0.3MoO3Low frequency dielectric spectroscopy and thermally stimulated discharge measurements of charge density wave (CDW) system K0.3MoO3 are presented. Below 80 K two distinct relaxational…D. Starešinić, K. Hosseini, W. Brütting et al.·Sep 4, 2003SaveLearn
Study of Crystal-field Effects in Rare-earth (RE) - Transition-metal Intermetallic Compounds and in RE-based Laser CrystalsRare-earth (RE) based compounds and alloys are of great interest both for their fundamental physical properties and for applications. In order to tailor the required compounds for a specific task,…Nicola Magnani·Sep 4, 2003SaveLearn
The Hall Effect and ionized impurity scattering in Si(1-x)GexUsing Monte Carlo simulations, we demonstrate that including ionized impurity scattering in models of Si(1-x)Gex is vital in order to predict the correct Hall parameters. Our results show…P. Kinsler, W. Th. Wenckebach·Sep 3, 2003SaveLearn
Comment on ``Strontium clusters: Many-body potential, energetics, and structural transitions'' [J. Chem. Phys. 115, 3640 (2001)]Parallel tempering simulations for Sr34 and Sr61 indicate that, contrary to Wang et al.'s predictions [J. Chem. Phys. 115, 3640 (2001)], there are no solid-solid transitions for these clusters,…Jonathan P. K. Doye, Florent Calvo·Sep 3, 2003SaveLearn
Imaging atom-clusters by hard x-ray free electron lasersThe ingenious idea of single molecule imaging by hard x-ray Free Electron Laser (X-FEL) pulses was recently proposed by Neutze et al. [Nature,406,752(2000)]. However, in their numerical modelling of…Zoltan Jurek, Gabor Oszlanyi, Gyula Faigel·Sep 3, 2003SaveLearn
Small adiabatic polaron with a long-range electron-phonon interactionTwo-site single electron system interacting with many vibrating ions of a lattice via a long-range (Fröhlich) electron-phonon interaction is studied in the adiabatic regime. The renormalised hopping…A. S. Alexandrov, B. Ya. Yavidov·Sep 2, 2003SaveLearn
Some Further Results for the Stationary Points and Dynamics of Supercooled LiquidsWe present some new theoretical and computational results for the stationary points of bulk systems. First we demonstrate how the potential energy surface can be partitioned into catchment basins…David J. Wales, Jonathan P. K. Doye·Sep 2, 2003SaveLearn
Auger Electron Cascades in Water and IceSecondary electron cascades can induce significant ionisation in condensed matter due to electron-atom collisions. This is of interest in the context of diffraction and imaging using X-rays, where…Nicusor Timneanu, Carl Caleman, Janos Hajdu et al.·Sep 2, 2003SaveLearn
Bulk Mediated Surface Diffusion: The Infinite System CaseAn analytical soluble model based on a Continuous Time Random Walk (CTRW) scheme for the adsorption-desorption processes at interfaces, called bulk-mediated surface diffusion, is presented. The time…Jorge A. Revelli, Carlos. E. Budde, Domingo Prato et al.·Sep 2, 2003SaveLearn
Photonic crystal polarizers and polarizing beam splittersWe have experimentally demonstrated polarizers and polarizing beam splitters based on microwave-scale two-dimensional photonic crystals. Using polarized microwaves within certain frequency bands, we…D. R. Solli, C. F. McCormick, R. Y. Chiao et al.·Sep 2, 2003SaveLearn
Experimental demonstration of photonic crystal waveplatesWe have constructed and experimentally tested a microwave half waveplate using the dispersive birefringent properties of a bulk two-dimensional photonic crystal away from its band gap. Our waveplate…D. R. Solli, C. F. McCormick, R. Y. Chiao et al.·Sep 2, 2003SaveLearn
Ballistic Transport in Metallic Nanotubes With Reliable Pd Ohmic ContactsContacting metallic single-walled carbon nanotubes by palladium (Pd) affords highly reproducible ohmic contacts and allows for detailed elucidation of ballistic transport in metallic nanotubes. The…David Mann, Ali Javey, Jing Kong et al.·Sep 1, 2003SaveLearn
Surface assembly and ultrafast operation of all-nanoscale resonant-tunneling transistorsRealization of a robust nanotube-heterostructure tunneling transistors [Solid State Comm. 116, p. 569 (2000)] requires the difficult formation [Science 293, p. 76 (2001)] of a central nanoscale…Per Hyldgaard·Sep 1, 2003SaveLearn