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- Tyndall National InstituteIE88 papers
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6 papers · 2 filters
Free-carrier relaxation and lattice heating in photoexcited bismuth thin films
Y. M. Sheu, Y. J. Chien, C. Uher +2
We report ultrafast surface pump and interface probe experiments on photoexcited carrier transport across single crystal bismuth films on sapphire. The film thickness is sufficient…
Surface organization of homoepitaxial InP films grown by metalorganic vapor-phase epitaxy
A. Gocalinska, M. Manganaro, D. D. VVedensky +1
We present a systematic study of the morphology of homoepitaxial InP films grown by metalorganic vapor-phase epitaxy which are imaged with ex situ atomic force microscopy. These fi…
Suppression of threading defects formation during Sb-assisted metamorphic buffer growth in InAs/InGaAs/InP structure
A. Gocalinska, M Manganaro, E. Pelucchi
A virtual substrate for high quality InAs epitaxial layer has been attained via metalorganic vapor-phase epitaxy growth of Sb-assisted InxGa1-xAs metamorphic buffers, following a c…
Direct Measurement of Room Temperature Non-diffusive Thermal Transport Over Micron Distances in a Silicon Membrane
Jeremy A. Johnson, A. A. Maznev, John Cuffe +6
The "textbook" phonon mean free path (MFP) of heat carrying phonons in silicon at room temperature is ~40 nm. However, a large contribution to the thermal conductivity comes from l…
Superspin Glass Mediated Giant Spontaneous Exchange Bias in a Nanocomposite of BiFeO-BiFeO
Tuhin Maity, Sudipta Goswami, Dipten Bhattacharya +1
We observe an enormous exchange bias (300-600 Oe) - measured in an unmagnetized state following zero-field cooling - in a nanocomposite of BiFeO ($…
Controllable selective exfoliation of high-quality graphene nanosheets and nanodots by ionic liquid assisted grinding
Nai Gui Shang, Pagona Papakonstantinou, Surbhi Sharma +6
Bulk quantities of graphene nanosheets and nanodots have been selectively fabricated by mechanical grinding exfoliation of natural graphite in a small quantity of ionic liquids. Th…