TO
1 - 25 of 6
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 1 |
 | Scarpulla, Michael | Ferromagnetic Ga1-xMnxAs produced by ion implantation and pulsed-laser melting | We demonstrate the formation of ferromagnetic Ga1-xMnxAs films by Mn ion implantation into GaAs followed by pulsed-laser melting. Irradiation with a single excimer laser pulse results in the epitaxial regrowth of the implanted layer with Mn substitutional fraction up to 80% and effective Curie tempe... | Gallium arsenide; Ferromagnetic semiconductors; Remanent magnetization | 2003 |
| 2 |
 | Tiwari, Ashutosh | Growth and characterization of TaN/TiN superlattice structures | Epitaxial B1 NaCl-structured TaN(3 nm)/TiN(2 nm) superlattice structures were grown on Si(100) substrates with a TiN buffer layer, using pulsed-laser deposition. A special target assembly was used to manipulate the thickness of each layer. X-ray diffraction, transmission electron microscopy, and ... | Diffusion barriers; Copper diffusion; Tantalum nitride | 2003 |
| 3 |
 | Scarpulla, Michael | Mutual passivation of group IV donors and nitrogen in diluted GaNxAs1 x alloys | We demonstrate the mutual passivation phenomenon of Ge donors and isovalent N in highly mismatched alloy GaNxAs1-x doped with Ge. Layers of this alloy were formed by the sequential implantation of Ge and N ions followed by pulsed laser melting and rapid thermal annealing. The mutual passivation effe... | Highly mismatched alloys; Passivation; Gallium arsenide | 2003 |
| 4 |
 | Lupton, John Mark | One and two-photon photocurrents from tunable organic microcavity photodiodes | We have constructed multilayer thin-film organic microcavity photodiodes with the photoactive layer comprised of a spin-coated conjugated polymer and an evaporated C60 layer. The electrodes are designed as semitransparent mirrors which form a resonant cavity structure. The photocurrent spectra show ... | Photocurrents; Microcavity photodiodes; Tunable photodiodes | 2003 |
| 5 |
 | Tiwari, Ashutosh | Rectifying electrical characteristics of La0.7Sr0.3MnO3/Zno heterostructure | We have fabricated a p - n junction, consisting of p-type manganite (La0.7Sr0.3MnO3) and n-type ZnO layers grown on sapphire substrate. This junction exhibits excellent rectifying behavior over the temperature range 20-300 K. Electrical characteristics of La0.7Sr0.3MnO3 (LSMO) film in this heterostr... | Manganites | 2003 |
| 6 |
 | Rogachev, Andrey | Superconducting properties of polycrystalline Nb nanowires templated by carbon nanotubes | Continuous Nb wires, 7-15 nm in diameter, have been fabricated by sputter-coating single fluorinated carbon nanotubes. Transmission electron microscopy revealed that the wires are polycrystalline, having grain sizes of about 5 nm. The critical current of wires thicker than ~12 nm is very high (107 A... | Polycrystalline Nb; Carbon nanotubes; Langer-Ambegaokar-McCumber-Halperin; Phase slips | 2003 |
1 - 25 of 6