Filters: Date: "2006-12" Collection: ir_uspace
1 - 25 of 9
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 1 |
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Scarpulla, Michael | Compositional tuning of ferromagnetism in Ga1-xMnxP | We report the magnetic and transport properties of Ga1-xMnxP synthesized via ion implantation followed by pulsed laser melting over a range of x, namely 0.018 to 0.042. Like Ga1-xMnxAs, Ga1-xMnxP displays a monotonic increase of the ferromagnetic Curie temperature with x associated with the hole-me... | Gallium arsenide; Ferromagnetic semiconductors | 2006-12 |
| 2 |
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Lupton, John Mark | Evidence for temperature-independent triplet diffusion in a ladder-type conjugated polymer | We study the temperature dependence of triplet formation and decay by considering the phosphorescence dynamics in a prototypical conjugated polymer matrix. The dynamics of triplet formation as a function of temperature are unraveled by applying an electric field during optical singlet generation a... | Triplet diffusion; Triplet excitons; Ladder-type conjugated polymers; Temperature dependence | 2006-12 |
| 3 |
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Gerton, Jordan | Fluorescence near-field microscopy of DNA at Sub-10A nm resolution | We demonstrate apertureless near-field microscopy of single molecules at sub-10 nm resolution. With a novel phase filter, near-field images of single organic fluorophores were obtained with ~sixfold improvement in the signal-to-noise ratio. The improvement allowed pairs of molecules separated by ~... | 2006-12 | |
| 4 |
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Mishchenko, Eugene | Generation of spin current by Coulomb drag | Coulomb drag between two quantum wires is exponentially sensitive to the mismatch of their electronic densities. The application of a magnetic field can compensate this mismatch for electrons of opposite spin directions in different wires. The resulting enhanced momentum transfer leads to the conv... | Spin current; Coulomb drag; Quantum wires | 2006-12 |
| 5 |
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Khan, Faisal Habib | Multilevel modular capacitor clamped DC-DC converter | A novel topology of multilevel modular capacitor clamped dc-dc converter (MMCCC) will be presented in this paper. In contrast to the conventional flying capacitor multilevel dc-dc converter (FCMDC), this new topology is completely modular and requires a simpler gate drive circuit. Moreover, the new ... | Capacitor-clamped converter; DC-DC converter; MMCCC; Multilevel modular capacitor | 2006-12 |
| 6 |
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Saam, Brian; Laicher, Gernot | Nuclear spin relaxation of 129Xe due to persistent xenon dimers | We have measured longitudinal nuclear relaxation rates of 129Xe in Xe-N2 mixtures at densities below 0.5 amagats in a magnetic field of 8.0 T. We find that intrinsic spin relaxation in this regime is principally due to fluctuations in the intramolecular spin-rotation (SR) and chemical-shift-anisot... | Nuclear spin relaxation; Xe129; Xenon dimmers | 2006-12 |
| 7 |
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Mishchenko, Eugene; Raikh, Mikhail E. | Planar array of semiconducting nanotubes in an external electric field: collective screening and polarizability | We study theoretically the charge separation in a planar array of semiconducting nanotubes (NTs) of length, 2h, placed in an external electric field, F, parallel to their axes. By employing the conformal mapping, we find analytically the exact distribution of the induced charge density for the arb... | Planar array | 2006-12 |
| 8 |
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Liu, Feng | Quantum size effect on adatom surface diffusion | Using scanning tunneling microscopy, we demonstrate that the nucleation density of Fe islands on the surface of nanoscale Pb films oscillates with the film thickness, providing a direct manifestation of the quantum size effect on surface diffusion. The Fe adatom diffusion barriers were derived to be... | Quantum size effect; QSE; Adatoms; Surface diffusion; Fe islands; Nanoscale metallic structures; Epitaxial growth; Pb films | 2006-12 |
| 9 |
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Boehme, Christoph | Transport and recombination through weakly coupled localized spin pairs in semiconductors during coherent spin excitation | Semianalytical predictions for the transients of spin-dependent transport and recombination rates through localized states in semiconductors during coherent electron-spin excitation are made for the case of weakly spin-coupled charge-carrier ensembles. The results show that the on-resonant Rabi freq... | Larmor frequency; Larmor separations | 2006-12 |
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