Zobrazeno 1 - 10
of 371
pro vyhledávání: '"Kopelevich, Y"'
Autor:
Kopelevich, Y. V., Torres, J. H. S., da Silva, R. Ricardo, Diamantini, M. C., Trugenbergerand, C. A., Vinokur, V. M.
Publikováno v:
Adv. Quantum Technol. 2023, 2300230
Room temperature superconductivity under normal conditions has been a major challenge of physics and material science since its very discovery. Here we report the global room-temperature superconductivity observed in cleaved highly oriented pyrolytic
Externí odkaz:
http://arxiv.org/abs/2208.00854
Publikováno v:
Supercond Nov Magn 33, 2669-2678 (2020)
We demonstrate a geometrical effect on the depinning line (DL) of the flux line lattice of the Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta}$ high-T$_c$ superconductor (HTSC) micrometer ring. The DL shifts to notably lower temperatures in comparison to bul
Externí odkaz:
http://arxiv.org/abs/2103.02244
Autor:
Moumen, S. Ben, Gagou, Y., Chettab, M., Mezzane, D., Amjoud, M., Fourcade, S., Hajji, L., Kutnjak, Z., Marssi, M. El, Amraoui, Y. El, Kopelevich, Y., Lukyanchuk, Igor A.
Perovskite manganite La0.5Ca0.5-x xMnO3 (LCMO) nanomaterials were elaborated using the sucrose modified auto combustion method. Rietveld refinements of the X-ray diffraction patterns of the crystalline structure confirm a single-phase orthorhombic st
Externí odkaz:
http://arxiv.org/abs/1910.12245
Autor:
Moumen, S. Ben, Gagou, Y., Belkhadir, S., Mezzane, D., Amjoud, M., Rozic, B., Hajji, L., Kutnjak, Z., Jaglicic, Z., Jagodic, M., Marssi, M. El, Kopelevich, Y., yanchuk, Igor A. Luk
High performance lead-free multiferroic composites are desired to replace the lead-based ceramics in multifunctional devices applications. Laminated compounds were prepared from ferroelectric and ferromagnetic materials. In this work, we present lami
Externí odkaz:
http://arxiv.org/abs/1910.01538
Autor:
Alaferdov, A. V., Savu, R., Canesqui, M. A., Kopelevich, Y. V., da Silva, R. R., Rozhkova, N. N., Pavlov, D. A., Usov, Yu. V., de Trindade, G. M., Moshkalev, S. A.
Publikováno v:
Carbon 129,826(2018)
Defects induced by liquid-phase exfoliation of graphite using sonication were studied. It was shown that localized impact by cavitation shock waves can produce bulk ripplocations and various types of dislocations in graphite nanoplatelets. Formation
Externí odkaz:
http://arxiv.org/abs/1906.05391
Highly-anisotropic in-plane magneto-resistance (MR) in graphite (HOPG) samples has been recently observed (Y. Kopelevich et al., arXiv:1202.5642) which is negative and linear in low fields in some current direction while it is giant, super-linear and
Externí odkaz:
http://arxiv.org/abs/1208.2866
Publikováno v:
EPL 98 (2012) 57006
This comment addresses several issues in the paper by Sepioni et al., where it is stated that the ferromagnetism in pristine highly oriented pyrolytic graphite (HOPG) reported by several groups in the previous years is most likely due to impurity con
Externí odkaz:
http://arxiv.org/abs/1204.2992
The ordinary magnetoresistance (MR) of doped semiconductors is positive and quadratic in a low magnetic field, B, as it should be in the framework of the Boltzmann kinetic theory or in the conventional hopping regime. We observe an unusual highly-ani
Externí odkaz:
http://arxiv.org/abs/1202.5642
Autor:
Ballestar, A., Esquinazi, P., Barzola-Quiquia, J., Dusari, S., Bern, F., da Silva, R. R., Kopelevich, Y.
The carrier density in tens of nanometers thick graphite samples (multi-layer-graphene, MLG) has been modified by applying a gate voltage ($V_g$) perpendicular to the graphene planes. Surface potential microscopy shows inhomogeneities in the carrier
Externí odkaz:
http://arxiv.org/abs/1202.3327
Publikováno v:
Phys. Rev. B 83, 233408 (2011)
Both experimental and theoretical studies of the magnetic properties of micrographite and nanographite indicate a crucial role of the partial oxidation of graphitic zigzag edges in ferromagnetism. In contrast to total and partial hydrogenation, the o
Externí odkaz:
http://arxiv.org/abs/1106.5565