Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Couedo, F"'
Autor:
Couëdo, François
La supraconductivité s’établit par une organisation collective des électrons, décrite dans le cadre de la théorie BCS par une même fonction d’onde macroscopique. En présence de fort désordre, la situation est plus complexe : le désordre
Externí odkaz:
http://www.theses.fr/2014PA112065/document
Publikováno v:
Phys. Rev. Materials 4, 104201 (2020)
We report transport measurements of strained InAs/In$_{x}$Ga$_{1-x}$Sb composite quantum wells (CQWs) in the quantum spin Hall phase, focusing on the control of the energy gap through structural parameters and an external electric field. For highly s
Externí odkaz:
http://arxiv.org/abs/2008.00664
Publikováno v:
Phys. Rev. B 101, 075433 (2020)
We study the influence of epitaxial strain on the electronic properties of InAs/GaSb composite quantum wells (CQWs), host structures for quantum spin Hall insulators, by transport measurements and eight-band $\mathbf{k\cdot p}$ calculations. Using di
Externí odkaz:
http://arxiv.org/abs/2002.12503
Electron motion in crystals is governed by the coupling between crystal momentum and internal degrees of freedom such as spin implicit in the band structure. The description of this coupling in terms of a momentum-dependent effective field and the re
Externí odkaz:
http://arxiv.org/abs/1902.05310
Autor:
Singh, G., Jouan, A., Herranz, G., Scigaj, M., Sanchez, F., Benfatto, L., Caprara, S., Grilli, M., Saiz, G., Couedo, F., Feuillet-Palma, C., Lesueur, J., Bergeal, N.
In multiorbital materials, superconductivity can exhibit new exotic forms that include several coupled condensates. In this context, quantum confinement in two-dimensional superconducting oxide interfaces offers new degrees of freedom to engineer the
Externí odkaz:
http://arxiv.org/abs/1806.02212
Publikováno v:
AIP Advances 9, 075005 (2019)
The characteristic frequencies of a system provide important information on the phenomena that govern its physical properties. In this framework, there has recently been renewed interest in cryogenic microwave characterization for condensed matter sy
Externí odkaz:
http://arxiv.org/abs/1801.00436
Autor:
Singh, G., Jouan, A., Benfatto, L., Couedo, F., Kumar, P., Dogra, A., Budhani, R., Caprara, S., Grilli, M., Lesne, E., Barthelemy, A., Bibes, M., Feuillet-Palma, C., Lesueur, J., Bergeal, N.
The large diversity of exotic electronic phases displayed by two-dimensional superconductors confronts physicists with new challenges. These include the recently discovered quantum Griffith singularity in atomic Ga films, topological phases in proxim
Externí odkaz:
http://arxiv.org/abs/1704.03365
Autor:
Amari, P., Feuillet-Palma, C., Jouan, A., Couedo, F., Bourlet, N., Géron, E., Malnou, M., Méchin, L., Sharafiev, A., Lesueur, J., Bergeal, N.
We report the fabrication of few hundred microns long, hundreds of nanometers wide and 30 nm thick meanders made from YBa2CU3O7. Thin films protected by a 8 nm-thick Ce02 cap layer have been patterned by high energy (a few tens of keV) oxygen ion irr
Externí odkaz:
http://arxiv.org/abs/1612.07730
The disorder-induced Superconductor-to-Insulator Transition in amorphous Nb$_{x}$Si$_{1-x}$ two-dimensional thin films is studied for different niobium compositions $x$ through a variation of the sample thickness $d$. We show that the critical thickn
Externí odkaz:
http://arxiv.org/abs/1408.3673
Reflection measurements give access to the complex impedance of a material on a wide frequency range. This is of interest to study the dynamical properties of various materials, for instance disordered superconductors. However reflection measurements
Externí odkaz:
http://arxiv.org/abs/1309.4321