Zobrazeno 1 - 10
of 636
pro vyhledávání: '"Alloul H."'
Autor:
Gilmutdinov, I. F., Schönemann, R., Vignolles, D., Proust, C., Mukhamedshin, I. R., Balicas, L., Alloul, H.
Publikováno v:
Phys. Rev. B v.104, L201103 (2021)
Electronic topology in metallic kagome compounds is under intense scrutiny. We present transport experiments in Na2/3CoO2 in which the Na order differentiates a Co kagome sub-lattice in the triangular CoO2 layers. Hall and magnetoresistance (MR) data
Externí odkaz:
http://arxiv.org/abs/2101.05252
Publikováno v:
Phys. Rev. Materials 4, 044201 (2020)
The incidence of topology on the band structure and physical properties of layered compounds has been extensively studied in semimetals. How those evolve in presence of electronic correlations has been less investigated so far. In the sodium cobaltat
Externí odkaz:
http://arxiv.org/abs/2001.09710
Autor:
Alloul H.
Publikováno v:
EPJ Web of Conferences, Vol 23, p 00015 (2012)
The discovery in 1991 of high temperature superconductivity (SC) in A3C60 compounds, where A is an alkali ion, has been rapidly ascribed to a BCS mechanism, in which the pairing is mediated by on ball optical phonon modes. While this has lead to cons
Externí odkaz:
https://doaj.org/article/24c0006a373f4623b4e4c7b008433047
Autor:
Alloul H., Rullier-Albenque F.
Publikováno v:
EPJ Web of Conferences, Vol 23, p 00016 (2012)
Large pulsed magnetic fields up to 60 Tesla are used to suppress the contribution of superconducting fluctuations (SCF) to the ab-plane conductivity above Tc in a series of YBa2Cu3O6+x. These experiments allow us to determine the field Hc’(T) and t
Externí odkaz:
https://doaj.org/article/09276303a7334f53805f858012daf732
Publikováno v:
Journal of Physics and Chemistry of Solids Volume 121, October 2018, Pages 145-150
In this study, we synthesized single crystals of Na$_{x}$CoO$_{2}$ with $x\sim0.8$ using the optical floating zone technique. A thorough electrochemical treatment of the samples permitted us to control the de-intercalation of Na to obtain single crys
Externí odkaz:
http://arxiv.org/abs/1711.01611
Autor:
Alloul, H., Wzietek, P., Mito, T., Pontiroli, D., Aramini, M., Riccò, M., Itié, J. P., Elkaim, E.
Publikováno v:
Phys. Rev. Lett. 118, 237601 (2017)
We present a detailed NMR study of the insulator to metal transition induced by an applied pressure $p$ in the A15 phase of Cs$_{3}$C$_{60}$. We evidence that the insulating antiferromagnetic (AF) and superconducting (SC) phases only coexist in a nar
Externí odkaz:
http://arxiv.org/abs/1610.00513
Autor:
Mukhamedshin, I. R., Alloul, H.
Publikováno v:
Physica B v.460, pp.58-63 (2015)
We have synthesized and characterized different stable phases of sodium cobaltates Na$_{x}$CoO$_{2}$ with sodium content $0.65
Externí odkaz:
http://arxiv.org/abs/1410.1489
Publikováno v:
Phys. Rev. B 90, 115151 (2014)
$^{59}$Co NMR experiments have been performed on single crystals of the layered cobaltate Na$_{x}$CoO$_{2}$ with x=0.77 which is an antiferromagnet with N\'eel temperature $T_{N}=22$~K. In this metallic phase six Co sites are resolved in the NMR spec
Externí odkaz:
http://arxiv.org/abs/1406.7470
Publikováno v:
JETP Letters, v.99, pp.471-475 (2014)
Single crystals of sodium cobaltates Na$_{x}$CoO$_{2}$ with $x \approx 0.8$ were grown by the floating zone technique. Using electrochemical Na de-intercalation method we reduced the sodium content in the as-grown crystals down to pure phase with 22
Externí odkaz:
http://arxiv.org/abs/1403.4567
Publikováno v:
Journal of Physics: Conference Series 449 (2013) 012010
Large pulsed magnetic fields up to 60 Tesla are used to suppress the contribution of superconducting fluctuations (SCF) to the ab-plane conductivity above Tc in a series of YBa2Cu3O6+x single crystals. The fluctuation conductivity is found to vanish
Externí odkaz:
http://arxiv.org/abs/1311.5205