A5007034332- Quantum and electron transport phenomena
- Physics of Superconductivity and Magnetism
- Graphene research and applications
- Topological Materials and Phenomena
- Cold Atom Physics and Bose-Einstein Condensates
- Nonlinear Dynamics and Pattern Formation
- Mechanical and Optical Resonators
- Plasmonic and Surface Plasmon Research
- Organic and Molecular Conductors Research
- Diamond and Carbon-based Materials Research
- Advancements in Semiconductor Devices and Circuit Design
- Superconducting Materials and Applications
- Theoretical and Computational Physics
- Quantum optics and atomic interactions
- Electronic and Structural Properties of Oxides
- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Balkan and Eastern European Studies
- Atomic and Subatomic Physics Research
- Magnetic and transport properties of perovskites and related materials
- Regional Development and Management Studies
- Force Microscopy Techniques and Applications
- Neural Networks and Reservoir Computing
- Crystallography and Radiation Phenomena
- Neurological disorders and treatments
Centre National de la Recherche Scientifique
2011-2024
Centre de Nanosciences et de Nanotechnologies
2024
Université Paris-Saclay
2024
Regulatory Agency for Electronic Communications and Postal Services
2023
University of Novi Sad
2023
Microsoft (Denmark)
2019-2020
University of Copenhagen
2019-2020
Yale University
2014-2020
Oncology Institute of Vojvodina
2020
University of Osijek
2016
We report on the selective-area chemical beam epitaxial growth of InAs in-plane, one-dimensional (1-D) channels using patterned SiO$_{2}$-coated InP(001), InP(111)B, and InP(110) substrates to establish a scalable platform for topological superconductor networks. Top-view scanning electron micrographs show excellent surface selectivity dependence major facet planes substrate orientations ridge directions, ratios energies were estimated. Detailed structural properties defects in nanowires...
We investigate intrinsic and extrinsic decay of edge magnetoplasmons (EMPs) in graphene quantum Hall (QH) systems by high-frequency electronic measurements. From EMP resonances disk shaped graphene, we show that the dispersion relation EMPs is nonlinear due to interactions, giving rise wavepacket. also identify dissipation mechanisms interaction with localized states bulk from time wavepackets. indicate that, owing unique linear gapless band structure, can be lower than GaAs systems.
We investigate electron dynamics at the graphene edge by studying propagation of collective magnetoplasmon (EMP) excitations. By timing travel narrow wave-packets on picosecond time scales around exfoliated samples, we find chiral with low attenuation a velocity which is quantized Hall plateaus. extract carrier drift contribution from EMP and it to be slightly less than Fermi velocity, as expected for an abrupt edge. also characteristic length Coulomb interaction smaller soft, depletion systems.
A semiconductor transmon with an epitaxial Al shell fully surrounding InAs nanowire core is investigated in the low $E_J/E_C$ regime. Little-Parks oscillations as a function of flux along hybrid wire axis are destructive, creating lobes reentrant superconductivity separated by metallic state at half-quantum applied flux. In first lobe, phase winding around can induce topological core. Coherent qubit operation observed both zeroth and lobes. Splitting parity bands coherent single-electron...
The properties of one-dimensional superconductors are strongly influenced by topological fluctuations the order parameter, known as phase slips, which cause decay persistent current in superconducting rings and appearance resistance wires. Despite extensive work, quantitative studies slips have been limited uncertainty regarding parameter's free energy landscape. Here we show detailed agreement between measurements isolated flux-biased Ginzburg-Landau theory over a wide range temperature,...
Via a direct coupling between the order parameter and singlet Josephson supercurrent we detect spin-wave resonances their dispersion in ferromagnetic junctions which usual insulating or metallic barrier is replaced with weak ferromagnet. The arises within Fraunhofer interferential description of effect because magnetic layer acts as time-dependent phase plate. A resonance at frequency ${\ensuremath{\omega}}_{s}$ implies dissipation that reflected depression current-voltage curve junction...
Creating a transmon qubit using semiconductor-superconductor hybrid materials not only provides electrostatic control of the frequency, it also allows parts circuit to be electrically connected and disconnected in situ by operating semiconductor region device as field-effect transistor (FET). Here, we exploit this feature compare same characteristics qubit, such frequency relaxation time, with related transport properties critical supercurrent normal-state resistance. Gradually opening FET...
We have observed propagation of Edge Magneto-Plasmon (EMP) modes in graphene the Quantum Hall regime by performing picosecond time flight measurements between narrow contacts on perimeter micrometric exfoliated graphene. find to be chiral with low attenuation and a velocity which is quantized plateaus. The has two contributions, one arising from conductivity other carrier drift along edge, we were able separate their different filling factor dependence. component found slightly less than...
We show experimentally and theoretically that there is a coupling via the Aharonov-Bohm phase between order parameter of ferromagnet singlet, s-wave, Josephson supercurrent. have investigated possibility measuring dispersion such spin waves by varying magnetic field applied in plane junction demonstrated electromagnetic nature observation resonance side-bands to microwave induced Shapiro steps.
We have investigated the classical phase dynamics of underdamped ferromagnetic Josephson junctions by measuring switching probability in both stationary and nonstationary regimes down to 350 mK. found escape temperature be bath temperature, with no evidence additional spin noise. In regime, we performed a pump-probe experiment on increasing frequency junction current bias. show that an incomplete energy relaxation leads dynamical bifurcation. Bifurcation manifests itself as premature...
Mondor's disease (MD), or superficial thrombophlebitis of the anterolateral thoracoabdominal wall, is a rare that presents with palpable cord-like induration beneath skin. It benign, self-limiting condition probably underestimated significance due to fact it may be manifestation an underlying breast carcinoma. can also resemble malignancy and, if physician not familiar clinical features MD, lead unnecessary biopsy. The diagnosis straightforward in most cases and based on thorough history...
We study the Josephson effect in ballistic SINIS and SIFIS double-barrier junctions, consisting of superconductors $(S)$, a clean normal $(N)$ or ferromagnetic $(F)$ metal, insulating interfaces $(I)$. For short double-tunnel junctions with one channel open for quasiparticle propagation, critical current as function junction width shows sharp peaks because resonant amplification Andreev process: when quasibound states interlayer enter superconducting gap bound are lowered down to Fermi...
An extended Josephson junction can be described as a microwave cavity coupled to oscillator. This is formally equivalent Fabry-Perot with freely vibrating mirror, where it has been shown that radiation pressure from photons in the reduce (increase) vibrations of effectively cooling (heating) it. We demonstrate that, similarly, superconducting phase difference across junction---the phase---can ``cooled'' or ``heated'' by excitation and both these effects increase power.
Hybrid superconductor/ferromagnet structures have been investigated recently to address the interplay between ferromagnetism and superconductivity. They also are very promising for investigation of out equilibrium Here, we show how it is possible excitations produced in a superconducting thin film (S) be localized ferromagnetic trap (F). Specifically, nanovolume good contact with S represents potential well quasiparticles (QPs) at gap edge. As proximity effect highly suppressed F, QPs get...
Anyons are exotic low-dimensional quasiparticles whose unconventional quantum statistics extends the binary particle division into fermions and bosons. The fractional Hall regime provides a natural host, with first convincing anyon signatures recently observed through interferometry cross-correlations of colliding beams. However, is rife experimental complications, such as an anomalous tunneling density states, which impede manipulation anyons. Here we show experimentally that canonical...
Abstract Anyons are exotic low-dimensional quasiparticles whose unconventional quantum statistics extend the binary particle division into fermions and bosons. The fractional Hall regime provides a natural host, with first convincing anyon signatures recently observed through interferometry cross-correlations of colliding beams. However, is rife experimental complications, such as an anomalous tunneling density states, which impede manipulation anyons. Here we show experimentally that...
We describe measurements of the thermally activated transitions between fluxoid states a single isolated superconducting ring. compare these with theoretical predictions in which all relevant parameters are determined via independent characterization same This no-free-parameters comparison shows qualitative agreement over wide range temperatures. discuss possible origins for remaining discrepancies data and theory, particular choice model order parameter's damping.