Zobrazeno 1 - 10
of 1 040
pro vyhledávání: '"Beltram F."'
Autor:
Kumar, Abhishek, Telesio, F., Forti, S., Al-Temimy, A., Coletti, C., Serrano-Ruiz, M., Caporali, M., Peruzzini, M., Beltram, F., Heun, S.
Publikováno v:
2D Mater. 6 (2019) 015005
Black Phosphorus (bP) has emerged as an interesting addition to the category of two-dimensional materials. Surface-science studies on this material are of great interest, but they are hampered by bP's high reactivity to oxygen and water, a major chal
Externí odkaz:
http://arxiv.org/abs/1808.09164
Autor:
Gomes, U. P., Ercolani, D., Zannier, V., Battiato, S., Ubyivovk, E., Mikhailovskii, V., Murata, Y., Heun, S., Beltram, F., Sorba, L.
Publikováno v:
Nanotechnology 28 (2017) 065603
We report on the heterogeneous nucleation of catalyst-free InAs nanowires on Si (111) substrates by chemical beam epitaxy. We show that nanowire nucleation is enhanced by sputtering the silicon substrate with energetic particles. We argue that partic
Externí odkaz:
http://arxiv.org/abs/1701.05153
Autor:
Aliaj, I., Torre, I., Miseikis, V., di Gennaro, E., Sambri, A., Gamucci, A., Coletti, C., Beltram, F., Granozio, F. M., Polini, M., Pellegrini, V., Roddaro, S.
Publikováno v:
APL Mater. 4, 066101 (2016)
We report on the transport properties of hybrid devices obtained by depositing graphene on a LaAlO3/SrTiO3 oxide junction hosting a 4 nm-deep two-dimensional electron system. At low graphene-oxide inter-layer bias the two electron systems are electri
Externí odkaz:
http://arxiv.org/abs/1602.07506
Autor:
Mashoff, T., Convertino, D., Miseikis, V., Coletti, C., Piazza, V., Tozzini, V., Beltram, F., Heun, S.
Publikováno v:
Applied Physics Letters 106, 083901 (2015)
Titanium-island formation on graphene as a function of defect density is investigated. When depositing titanium on pristine graphene, titanium atoms cluster and form islands with an average diameter of about 10nm and an average height of a few atomic
Externí odkaz:
http://arxiv.org/abs/1410.2741
Autor:
Paradiso, N., Heun, S., Roddaro, S., Pfeiffer, L. N., West, K. W., Sorba, L., Biasiol, G., Beltram, F.
Publikováno v:
Physica E 42, 1038 (2010)
Electronic Mach-Zehnder interferometers in the Quantum Hall (QH) regime are currently discussed for the realization of quantum information schemes. A recently proposed device architecture employs interference between two co-propagating edge channels.
Externí odkaz:
http://arxiv.org/abs/1312.1630
Phase-coherent acoustoelectric transport is reported.Aharonov-Bohm oscillations in the acoustoelectric current with visibility exceeding 100% were observed in mesoscopic GaAs rings as a function of an external magnetic field at cryogenic temperatures
Externí odkaz:
http://arxiv.org/abs/1309.1241
Autor:
Stornaiuolo, D., Rotoli, G., Massarotti, D., Carillo, F., Longobardi, L., Beltram, F., Tafuri, F.
Publikováno v:
Phys. Rev. B 87, 134517 (2013)
We report on the study of the phase dynamics of high critical temperature superconductor Josephson junctions. We realized YBa$_2$Cu$_3$O$_{7-x}$ (YBCO) grain boundary (GB) biepitaxial junctions in the submicron scale, using low loss substrates, and a
Externí odkaz:
http://arxiv.org/abs/1307.0106
Publikováno v:
Supercond. Sci. Technol. 25, 035011 (2012)
YBaCuO nanowires were reproducibly fabricated down to widths of 50 nm. A Au/Ti cap layer on YBCO yielded high electrical performance up to temperatures above 80 K in single nanowires. Critical current density of tens of MA/cm2 at T = 4.2 K and of 10
Externí odkaz:
http://arxiv.org/abs/1201.1886
Publikováno v:
Appl. Phys. Lett. 98, 032501 (2011)
The fabrication and operation of V-based superconducting nanorefrigerators is reported. Specifically, electrons in an Al island are cooled thanks to hot-quasiparticle extraction provided by tunnel-coupled V electrodes. Electronic temperature reductio
Externí odkaz:
http://arxiv.org/abs/1011.0588
Autor:
De Simoni, G., Singha, A., Gibertini, M., Karmakar, B., Polini, M., Piazza, V., Pfeiffer, L. N., West, K. W., Beltram, F., Pellegrini, V.
Publikováno v:
Appl. Phys. Lett. 97, 132113 (2010)
We report the magneto-transport properties of a two-dimensional electron gas in a modulation-doped AlGaAs/GaAs heterostructure subjected to a lateral potential with honeycomb geometry. Periodic oscillations of the magneto-resistance and a delocalized
Externí odkaz:
http://arxiv.org/abs/1007.3168