Search Results - "Heun, S"

Increasing the active surface of titanium islands on graphene by nitrogen sputtering by Mashoff, T., Convertino, D., Miseikis, V., Coletti, C., Piazza, V., Tozzini, V., Beltram, F., Heun, S.

“…Titanium-island formation on graphene as a function of defect density is investigated. When depositing titanium on pristine graphene, titanium atoms cluster…”
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Phosphorus oxide gate dielectric for black phosphorus field effect transistors by Dickerson, W., Tayari, V., Fakih, I., Korinek, A., Caporali, M., Serrano-Ruiz, M., Peruzzini, M., Heun, S., Botton, G. A., Szkopek, T.

“…The environmental stability of the layered semiconductor black phosphorus (bP) remains a challenge. Passivation of the bP surface with phosphorus oxide, POx,…”
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Half-integer Shapiro steps in highly transmissive InSb nanoflag Josephson junctions by Iorio, A., Crippa, A., Turini, B., Salimian, S., Carrega, M., Chirolli, L., Zannier, V., Sorba, L., Strambini, E., Giazotto, F., Heun, S.

“…We investigate a ballistic InSb nanoflag-based Josephson junction with Nb superconducting contacts. The high transparency of the superconductor-semiconductor…”
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Measurement of topological Berry phase in highly disordered graphene by Bennaceur, K., Guillemette, J., Lévesque, P. L., Cottenye, N., Mahvash, F., Hemsworth, N., Kumar, Abhishek, Murata, Y., Heun, S., Goerbig, M. O., Proust, C., Siaj, M., Martel, R., Gervais, G., Szkopek, T.

“…We have observed the quantum Hall effect (QHE) and Shubnikov-de Haas (SdH) oscillations in highly disordered graphene at magnetic fields up to 65 T. Disorder…”
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Tuning surface reactivity via electron quantum confinement by ABALLE, L, BARINOV, A, LOCATELLI, A, HEUN, S, KISKINOVA, M

“…The effect of electron quantum confinement on the surface reactivity of ultrathin metal films is explored by comparing the initial oxidation rate of atomically…”
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Propagation of visible light in nanostructured niobium stripes embedded in a dielectric polymer by Telesio, F, Mezzadri, F, Serrano-Ruiz, M, Peruzzini, M, Bisio, F, Heun, S, Fabbri, F

“…Abstract Nanometric metallic stripes allow the transmission of optical signals via the excitation and propagation of surface-localized evanescent…”
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Observation of thermally activated domain wall transformations by Laufenberg, M., Backes, D., Bührer, W., Bedau, D., Kläui, M., Rüdiger, U., Vaz, C. A. F., Bland, J. A. C., Heyderman, L. J., Nolting, F., Cherifi, S., Locatelli, A., Belkhou, R., Heun, S., Bauer, E.

“…The spin structure of head-to-head domain walls in Ni 80 Fe 20 structures is studied using high-resolution photoemission electron microscopy. The quantitative…”
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Head-to-head domain-wall phase diagram in mesoscopic ring magnets by Kläui, M., Vaz, C. A. F., Bland, J. A. C., Heyderman, L. J., Nolting, F., Pavlovska, A., Bauer, E., Cherifi, S., Heun, S., Locatelli, A.

“…The nanoscale spin structure of head-to-head domain walls in mesoscopic ferromagnetic rings has been studied by high-resolution nonintrusive photoemission…”
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Selective control of edge-channel trajectories by scanning gate microscopy by Paradiso, N., Heun, S., Roddaro, S., Pfeiffer, L.N., West, K.W., Sorba, L., Biasiol, G., Beltram, F.

“…Electronic Mach–Zehnder interferometers in the quantum Hall (QH) regime are currently discussed for the realization of quantum information schemes. A recently…”
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Three-dimensional magnetic-flux-closure patterns in mesoscopic Fe islands by HERTEL, R, FRUCHART, O, CHERIFI, S, JUBERT, P.-O, HEUN, S, LOCATELLI, A, KIRSCHNER, J

“…We have investigated three-dimensional magnetization structures in numerous mesoscopic Fe/Mo(110) islands by means of x-ray magnetic circular dichroism…”
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Ultra-thin high-quality silicon nitride films on Si(111) by Falta, J, Schmidt, Th, Gangopadhyay, S, Clausen, T, Brunke, O, Flege, J. I, Heun, S, Bernstorff, S, Gregoratti, L, Kiskinova, M

“…Ultra-thin silicon nitride films grown by exposure of Si(111) substrates to a flux of atomic nitrogen at temperatures between 700 °C and 1050 °C have been…”
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Alignment of Ge nanoislands on Si(111) by Ga-induced substrate self-patterning by Schmidt, Th, Flege, J I, Gangopadhyay, S, Clausen, T, Locatelli, A, Heun, S, Falta, J

“…A novel mechanism is described which enables the selective formation of three-dimensional Ge islands. Submonolayer adsorption of Ga on Si(111) at high…”
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Pd-Assisted Growth of InAs Nanowires by Heun, S, Radha, B, Ercolani, D, Kulkarni, G. U, Rossi, F, Grillo, V, Salviati, G, Beltram, F, Sorba, L

“…We report the Pd-assisted chemical beam epitaxy growth of zinc blende InAs nanowires which are grown on InAs(111)A substrates by employing Pd octane and…”
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Diffusion dynamics during the nucleation and growth of Ge/Si nanostructures on Si(111) by Ratto, F, Locatelli, A, Fontana, S, Kharrazi, S, Ashtaputre, S, Kulkarni, S K, Heun, S, Rosei, F

“…We report a low energy electron microscopy study of the relation between self-organized Ge/Si(111)nanostructures and their local environment. By comparison…”
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A numerical approach to quantify self-ordering among self-organized nanostructures by Ratto, F., Johnston, T.W., Heun, S., Rosei, F.

“…The geometrical layout in two-dimensional arrays of self-organized nanostructures is usually not completely ordered, nor completely disordered. The ability to…”
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Aggregate fluorescence in conjugated polymers by Lemmer, U., Heun, S., Mahrt, R.F., Scherf, U., Hopmeier, M., Siegner, U., Go¨bel, E.O., Mu¨llen, K., Ba¨ssler, H.

“…We study the dynamics of optical excitations in solid films of ladder-type poly(para-phenylene) (LPPP). A low-energy emission band is observed in the…”
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Composition uniformity of site-controlled InAs/GaAs quantum dots by Biasiol, G., Baranwal, V., Heun, S., Prasciolu, M., Tormen, M., Locatelli, A., Mentes, T.O., Niño, M.A., Sorba, L.

“…We have studied the composition profiles of Stranski–Krastanov InAs/GaAs quantum dots grown on patterned nanohole arrays. Two dimensional surface chemical maps…”
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Dip-pen nanolithography with magnetic Fe2O3 nanocrystals by Gundiah, Gautam, John, Neena Susan, Thomas, P. John, Kulkarni, G. U., Rao, C. N. R., Heun, S.

“…Dip-pen nanolithography has been employed to obtain magnetic nanopatterns of γ-Fe2O3 nanocrystals on mica and silicon substrates. The chemical and magnetic…”
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Atomic force microscope anodic oxidation studied by spectroscopic microscopy by Lazzarino, M., Heun, S., Ressel, B., Prince, K. C., Pingue, P., Ascoli, C.

“…Atomic force microscope (AFM) induced local oxidation is a versatile and promising nanofabrication process used successfully to produce quantum devices…”
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Surface compositional gradients of InAs ∕ GaAs quantum dots by Biasiol, G., Heun, S., Golinelli, G. B., Locatelli, A., Mentes, T. O., Guo, F. Z., Hofer, C., Teichert, C., Sorba, L.

“…With laterally resolved photoemission spectroscopy, we obtained In and Ga surface concentration maps of InAs ∕ GaAs quantum dots. Our data demonstrate that the…”
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