A5016960578- Physics of Superconductivity and Magnetism
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Quantum and electron transport phenomena
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Surface and Thin Film Phenomena
- Superconductivity in MgB2 and Alloys
- Superconducting and THz Device Technology
- Theoretical and Computational Physics
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Electronic and Structural Properties of Oxides
- Magnetic and transport properties of perovskites and related materials
- COVID-19 and healthcare impacts
- Quantum, superfluid, helium dynamics
- Particle Detector Development and Performance
- Magnetic properties of thin films
- Iron-based superconductors research
- Nuclear physics research studies
- Advanced Energy Technologies and Civil Engineering Innovations
- Mechanical and Optical Resonators
- Metallic Glasses and Amorphous Alloys
- Cold Atom Physics and Bose-Einstein Condensates
- Building Energy and Comfort Optimization
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
2021-2024
Centre National de la Recherche Scientifique
2014-2024
Université Paris-Saclay
2009-2024
Institut National de Physique Nucléaire et de Physique des Particules
2013-2024
Wellesley College
2023
Université Paris-Sud
2008-2020
Campus France
2006-2019
Protéomique, Réponse Inflammatoire et Spectrométrie de Masse
2006-2018
University of Insubria
2015
RIKEN
2011
This paper reports on the development of a technology involving $$^{100}\hbox {Mo}$$ -enriched scintillating bolometers, compatible with goals CUPID, proposed next-generation bolometric experiment to search for neutrinoless double-beta decay. Large mass ( $$\sim 1~\hbox {kg}$$ ), high optical quality, radiopure -containing zinc and lithium molybdate crystals have been produced used develop performance single detector modules based 0.2–0.4 kg bolometers. In particular, energy resolution...
We present new constraints on the couplings of axions and more generic axion-like particles using data from EDELWEISS-II experiment. The EDELWEISS experiment, located at Underground Laboratory Modane, primarily aims direct detection WIMPs germanium bolometers. It is also sensitive to low-energy electron recoils that would be induced by solar or dark matter axions. Using a total exposure up 448 kg.d, we searched for axion-induced down 2.5 keV within four scenarios involving different...
We present transport measurements of a nondegenerate two-dimensional electron system on the surface liquid helium at point constriction. The constriction is formed in microchannel by split gate beneath surface. electrostatic energy system, which depends part density, determines split-gate voltage threshold current flow through Steplike increases conductance are observed as confinement strength reduced. As Coulomb interaction between electrons strong, we attribute this effect to increase...
The LUMINEU program aims at performing a pilot experiment on neutrinoless double beta decay of 100Mo using radiopure ZnMoO4 crystals operated as cryogenic scintillating bolometers. Growth high quality is complex task, since there are no commercial molybdenum compounds available with the required level purity and radioactive contamination. This paper discusses approaches to purify synthesize for crystal growth. A combination sublimation (with addition zinc molybdate) subsequent...
A study of magnetic-field tuned superconductor-insulator transitions in amorphous $Nb_{0.15}Si_{0.85}$ thin films shows that quantum are characterized by an unambiguous signature -- a kink the temperature profile critical magnetic field. Using this criterion, we show nature transition depends on orientation field with respect to film. For perpendicular field, is controlled fluctuations indications for existence Bose insulator; while parallel classical, driven breaking Cooper pairs at...
The LUMINEU (Luminescent Underground Molybdenum Investigation for NEUtrino mass and nature) project envisages a high-sensitivity search neutrinoless double beta (0ν 2β) decay of 100Mo with the help scintillating bolometers based on zinc molybdate (ZnMoO4) crystals. One crucial points successful performance this experiment is development protocol producing high quality large ZnMoO4 crystal scintillators extremely internal radiopurity. Here we report significant progress in volume crystalline...
By scanning tunneling microscopy (STM) we have probed the local quasi-particle density of states (DOS) Bechgaard salt organic superconductor $\mathrm{(TMTSF)_{2}ClO_{4}}$ in slowly cooled single crystals cleaved under ultrahigh vacuum conditions. In well STM imaged crystallographic surface planes, DOS has been for different areas at temperatures above and below critical temperature superconducting or insulating spin-density wave states. While a rather homogeneous state is expected bulk from...
A bstract Neutrinoless double-beta decay is a key process in particle physics. Its experimental investigation the only viable method that can establish Majorana nature of neutrinos, providing at same time sensitive inclusive test lepton number violation. CROSS (Cryogenic Rare-event Observatory with Surface Sensitivity) aims developing and testing new bolometric technology to be applied future large-scale experiments searching for neutrinoless promising nuclei 100 Mo 130 Te. The limiting...
We present a study of the Nernst effect in amorphous superconducting thin films Nb$_{0.15}$Si$_{0.85}$. The field dependence coefficient above T$_{c}$ displays two distinct regimes separated by scale set Ginzburg-Landau correlation length. A single function $F(\xi)$, with length as its unique argument either zero-field (in low magnetic limit) or opposite limit), describes coefficient. conclude that signal observed on wide temperature ($30 \times T_c$) and ($4 B_{c2}$) range is exclusively...
We report on the development of scintillating bolometers based lithium molybdate crystals that contain molybdenum has depleted into double-β active isotope 100Mo (Li2100deplMoO4). used two Li2100deplMoO4 cubic samples, each which consisted 45-millimeter sides and had a mass 0.28 kg; these samples were produced following purification crystallization protocols developed for search experiments with 100Mo-enriched Li2MoO4 crystals. Bolometric Ge detectors utilized to register scintillation...
Random coincidences of events could be one the main sources background in search for neutrino-less double-beta decay $^{100}$Mo with macro-bolometers, due to their modest time resolution. Scintillating bolometers as those based on Li$_2$MoO$_4$ crystals and employed CROSS CUPID experiments can eventually exploit coincident fast signal detected a light detector reduce this background. However, scintillation provides signal-to-noise ratio, making difficult pile-up pulse-shape recognition...
We have studied the thickness-induced superconductor-to-insulator transition in presence of a magnetic field for $a$-NbSi thin films. Analyzing critical behavior this system within ``dirty boson model,'' we found exponent product ${\ensuremath{\nu}}_{d}z\ensuremath{\sim}0.4$. The corresponding phase diagram $(H,d)$ plane is inferred. This small product, as well nonuniversal value resistance at transition, calls further investigations order to thoroughly understand these transitions.
$a$-Nb${}_{x}$Si${}_{1\ensuremath{-}x}$ thin films with thicknesses down to 25 \AA{} have been structurally characterized by transmission electron microscopy measurements. As-deposited or annealed are shown be continuous and homogeneous in composition thickness, up an annealing temperature of 500 ${}^{\ensuremath{\circ}}\mathrm{C}$. We carried out low-temperature transport measurements on these close the superconductor-to-insulator transition (SIT) a qualitative difference between effect...
Abstract In preparation for the CROSS experiment to search double-beta (2β) decay of 100 Mo, we upgraded a low-background facility at Canfranc underground laboratory (Spain) by installing magnetic damping-based detector suspension inside pulse-tube cryostat. We tested in low-temperature (15 mK) measurements with two scintillating bolometers made large-volume crystals 116 CdWO 4 (reference set-up) and Li 2 MoO (R&D CLYMENE project view CUPID 2β experiment), each coupled thin Ge bolometric...
The LUMINEU program aims at performing a pilot experiment on neutrinoless double beta decay of 100Mo using radiopure ZnMoO4 crystals operated as scintillating bolometers. Growth high quality is complex task, since there are no commercially available molybdenum compounds with the required levels purity and radioactive contamination. This paper discusses approaches to purify synthesize compound for crystal growth. A combination sublimation (with addition zinc molybdate) subsequent...
Phonon-mediated particle detectors based on single crystals and operated at millikelvin temperatures are used in rare-event experiments for neutrino physics dark-matter searches. In general, these devices not sensitive to the impact point, especially if detection is mediated by thermal phonons. this Letter, we demonstrate that excellent discrimination between interior surface β α events can be achieved coating a crystal face with thin metallic film, either continuous or form of grid. The...
Using a proper cooling procedure, controllable amount of non-magnetic structural disorder can be introduced at low temperature in (TMTSF)2ClO4. Here we performed simultaneous measurements transport and magnetic properties (TMTSF)2ClO4 its normal superconducting states, while finely covering three orders magnitude the rate around anion ordering temperature. Our result reveals, with increasing density disorder, existence crossover between homogeneous defect-controlled d-wave superconductivity...
Competing phenomena in low dimensional systems can generate exotic electronic phases, either through symmetry breaking or a non-trivial topology. In two-dimensional (2D) systems, the interplay between superfluidity, disorder and repulsive interactions is especially fruitful this respect although both exact nature of phases microscopic processes at play are still open questions. particular, 2D, once superconductivity destroyed by disorder, an insulating ground state expected to emerge, as...
Rectification effects in solid-state devices are a consequence of nonreciprocal transport properties. This phenomenon is usually observed systems with broken inversion symmetry. In most instances, arises the presence an applied magnetic field and rectified signal has antisymmetric dependence on field. We have rectification environmental electromagnetic fluctuations plain Nb channels without any asymmetry design, leading to spontaneous voltage peaks at superconducting transition. The...
The CROSS experiment will search for neutrinoless double-beta decay using a specific mechanical structure to hold thermal detectors. design of the was tuned minimize background contribution, keeping an optimal detector performance. A single module holds two scintillating bolometers (with crystal size 45x45x45 mm and Ge slab facing crystal's upper side) in Cu frame, allowing modular construction large-scale array. Two designs are released: initial $Thick$ version contains around 15% over mass...