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Showing 1 to 20 of 78 for “"quasi-one-dimensional"”.
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Quasi-One-Dimensional Ultracold Fermi Gases
… Using phase separation as a guide, we probe the dimensional crossover between 1D and 3D. The phase separation in 1D is inverted from that in 3D, which provides a unique characteristic to distinguish between the dimensions. By varying the tunneling between tubes and the atomic interactions in a 2D …
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Superconductor -Insulator Transition in Quasi-One-Dimensional Nanowires
"We have studied a large group of superconducting MoGe nanowires fabricated by a molecular templating technique. A well-defined superconductor-insulator transition (SIT) is observed in homogeneous wires with lengths less than ∼200 nm. The total normal state resistance of the wire is found to be the …
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Superconductor-insulator transition in quasi-one-dimensional nanowires
We have studied a large group of superconducting MoGe nanowires fabricated by a molecular templating technique. A well-defined superconductor-insulator transition (SIT) is observed in homogeneous wires with lengths less than ~200 nm. The total normal state resistance of the wire is found to be the …
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Monte Carlo simulation of quasi-one-dimensional semiconductors
… of the particular confinement configuration of one-dimensional systems, the absence of angular randomization during scattering makes the carrier distribution sensitive to external perturbations and causes appreciable deviations from the equilibrium relatively rapidly. A Monte Carlo simulation is …
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Acoustoelectric charge transport in quasi-one-dimensional systems
… details new experimental investigations of one such system. The piezoelectric interaction between an acoustic wave travelling on the surface of a GaAs heterostructure and electrons in a quasi-1D sys- tem de ned therein generates a current which, under certain conditions, can be quantized in …
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Physics and fabrication of quasi-one-dimensional conductors
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1993.
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Electroabsorption spectroscopy of quasi-one-dimensional organic molecular crystals
… of electroabsorption spectroscopy on quasi-one-dimensional organic molecular crystals such as PTCDA and MePTCDI vapor deposited thin films to clarify the involvement of the charge-transfer exciton in the lowest excited state. By a self-built experimental setup, two kinds of …
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Ultrafast exciton relaxation in quasi-one-dimensional perylene derivatives
… point relax towards the border of the Brillouin zone on a 100fs time scale in both systems. Excitonic relaxation is accelerated by increase of temperature and/or excitation density, which is attributed to stimulated phonon emission during relaxation in k-space. Lower and upper limits of the …
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Ultrafast Dynamics in Quasi-One-Dimensional Organic Molecular Crystals
… sich mit ultraschnellen Relaxationsprozessen in quasi-eindimensionalen organischen Molekülkristallen. Als Modellsystem wird das Perylenderivat MePTCDI untersucht. Mit verschiedenen Methoden der optischen Ultrakurzzeit-Spektroskopie werden Prozesse der Exzitonen- und Phononenrelaxation in der …
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Magnetotransport along non parabolically confined quasi-one-dimensional channels
The one-electron spectrum, pertinent to a quantum wire in the presence of a magnetic field, is obtained for parabolic and weakly nonparabolic confining potentials. Different orientations of the magnetic field are considered and the corresponding ac and do responses of the wire are evaluated, for …
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Charge-Density-Wave Transport in Quasi - One-Dimensional Conductors
… spectra with 23 harmonics and spectral widths of one part in 30,000 and literally hundreds of subharmonic mode-locked features in the dc I-V characteristic are observed. However, crystal defects other than impurities can significantly degrade the measured properties, and play a determining role in …
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A quasi one-dimensional analysis for confined vortex cores
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1995.
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Conductance and magnetoconductance of parabolically confined quasi-one-dimensional channels
… is studied along parabolically confined quasi-one dimensional channels in the framework of linear-response theory. In the absence of a magnetic field an expression for the conductance is obtained, that agrees with those in the previous, literature on this subject, as well as with the …
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Investigation of Frustrated Quasi-One-Dimensional Quantum Spin-Chain Materials
… are S=1/2 (Cu2+ 3d9 electronic configuration) quasi-one-dimensional quantum spin-chain compounds. Both compounds crystallize with tetragonal structures containing edge sharing CuO6 octahedra chains which experience Jahn-Teller distortions. The basal planes of the octahedra link together to form …
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Quasi-One-Dimensional Modeling of an Adiabatic-Compression Preheated Ludwieg Tube
… Further characterization is performed with quasi-one-dimensional Euler computations. The MOC approach shows the optimal operating condition constrains the compression ratio and Ludwieg tube to nozzle exit diameter ratio, assuming proper simulation of flight conditions. The unsteady Euler …
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Scanning tunneling microscopy of quasi-one-dimensional charge-density wave materials
… Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission
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Investigation of quasi-one-dimensional orthorhombic tantalum trisulfide using scanning tunneling microscopy
This thesis describes the study of the quasi-one-dimensional material orthorhombic tantalum trisulfide. TaS3 and other transition metal trichalcogenides have been studied extensively because of their unique electronic properties. However, this study presents the first scanning tunneling microscope …
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A quasi-one-dimensional digital simulation for the time-varying vocal tract.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1973. Elec.E.
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