A5022545803- Physics of Superconductivity and Magnetism
- 2D Materials and Applications
- Magnetic properties of thin films
- Superconductivity in MgB2 and Alloys
- Iron-based superconductors research
- Advanced Condensed Matter Physics
- Comparative International Legal Studies
- Bacterial biofilms and quorum sensing
- Employment, Labor, and Gender Studies
- HVDC Systems and Fault Protection
- Graphene research and applications
- Nanofabrication and Lithography Techniques
- Silicon Carbide Semiconductor Technologies
- Magnetic Properties and Applications
- Thermal properties of materials
- Antimicrobial Peptides and Activities
- Business, Education, Mathematics Research
- Finance, Taxation, and Governance
- Labor Law and Work Dynamics
- Advanced Thermoelectric Materials and Devices
- Spanish Literature and Culture Studies
- Magnetic and transport properties of perovskites and related materials
- Superconducting Materials and Applications
- Administrative Law and Governance
- Quantum and electron transport phenomena
Madrid Institute for Advanced Studies
2015-2023
IMDEA Nanoscience
2015-2022
Universidad Autónoma de Madrid
2012-2016
Science et Ingénierie des Matériaux et Procédés
2012
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2012
Institut Nanosciences et Cryogénie
2012
CEA Grenoble
2012
Universidade de Santiago de Compostela
2002-2011
We present measurements of the superconducting and charge density wave critical temperatures (Tc TCDW) as a function pressure in transition metal dichalchogenides 2H-TaSe2 2H-TaS2. Resistance susceptibility show that Tc increases from below 1 K up to 8.5 at 9.5 GPa 2H-TaS2 8.2 23 2H-TaSe2. observe kink dependence TCDW about 4 we attribute lock-in incommensurate CDW commensurate CDW. Above this pressure, slowly decreases coexisting with superconductivity within our full range.
We present measurements of the superconducting critical temperature Tc and upper field Hc2 as a function pressure in transition metal dichalcogenide 2H-NbS2 up to 20 GPa. observe that increases smoothly from 6K at ambient about 8.9K 20GPa. This range increase is comparable one found previously 2H-NbSe2. The dependence Hc2(T) varies considerably when increasing pressure. At low pressures, Hc2(0) decreases, higher pressures both simultaneously. points out there are induced changes Fermi...
Nanoimprinted surface nanocomposite films exhibit multifunctional broadband anti-reflective and photo-induced self-cleaning properties with improved mechanical resistance.
Abstract Lack of reproducibility hampers molecular devices integration into large-scale circuits. Thus, incorporating operando characterization can facilitate the understanding multiple features producing disparities in different devices. In this work, we report realization hybrid graphene field effect transistors (m-GFETs) based on 11-(Ferrocenyl)undecanethiol (FcC 11 SH) micro self-assembled monolayers (μSAMs) and high-quality (Gr) a back-gated configuration. On one hand, Gr enables redox...
The rapid emergence of antibiotic resistant bacteria has prompted the need for radically different approaches to combat bacterial infections. Among these, bioinspired surface topographies have emerged as an effective sustainable strategy deter infection. This study demonstrates bactericidal activity and cytocompatibility moth-eye mimetic topography produced by thermal polymer nanoimprinting. was found capabilities against Gram negative positive bacteria. Electron microscopy imaging revealed...
We report a characterization of surfaces the dichalcogenide TaSe${}_{2}$ using scanning tunneling microscopy and spectroscopy at 150 mK. When top layer has $2H$ structure immediately below $1T$ structure, we find singular spatial dependence conductance 1 K, changing from zero-bias peak on Se atoms to gap in between atoms. The is additionally modulated by commensurate $3{a}_{0}\ifmmode\times\else\texttimes\fi{}3{a}_{0}$ charge-density wave $2H$-TaSe${}_{2}$. Multilayers $2H$-TaSe${}_{2}$ show...
We present resistivity, magnetization, and specific-heat measurements on flux-grown single crystals of NiBi${}_{3}$. find typical behavior a type-II superconductor, with, however, sizable magnetic signal in the superconducting phase. There is hysteretic magnetization characteristic ferromagnetic compound. By following as function temperature, we drop at temperatures corresponding to Curie temperature amorphous Ni. Thus, assign magnetism NiBi${}_{3}$ Ni impurities.
Abstract Here we present the assembly of novel transparent all-polymer distributed feedback (DFB) lasers. Flexible and highly cellulose diacetate (CdA) was employed as substrate on which gratings with different periods were engraved by thermal nanoimprinting high fidelity. Highly luminescent conjugated polymers (CP), poly (9,9-dioctylfluorene) (PFO), poly(9,9-dioctylfluorene-alt-benzothiadiazole) (F8BT), a blend F8BT poly(3-hexylthiophene)-poly(9,9-dioctylfluorene-alt-benzothiadiazole)...
Hybridisation is a powerful strategy towards the next generation of multifunctional materials for environmental and sustainable energy applications. Here, we report new inorganic nanocarbon hybrid material prepared with atomically controlled deposition monocrystalline TiO2 layer that conformally coats macroscopic carbon nanotube (CNT) fiber. Through X-ray diffraction, Raman spectroscopy photoemission detect formation covalent Ti-O-C bond at TiO2/CNT interface residual strain approximately...
Moth-eye nanocomposite surfaces are fabricated in combined processing steps of nanoparticle coating and surface nanoimprinting enabling the production safer-by-design antibacterial nanoparticle-based materials.
This work presents a practical methodology to produce multilevel hierarchical structures with precise control of the structural geometry at every level by combining photo and nanoimprint lithography processes. The method involves sequential steps nanoimprinting first deposited polymer layer followed second photoresin and, afterward, performing on this optical means maskless laser writer pattern micrometer-size features. A topography is consequently obtained comprising nanopatterns...
The layered rare-earth diantimonides $R{\mathrm{Sb}}_{2}$ are anisotropic metals with generally low electronic densities whose properties can be modified by substituting the rare earth. ${\mathrm{LaSb}}_{2}$ is a nonmagnetic metal residual resistivity presenting low-temperature magnetoresistance that does not saturate magnetic field. It has been proposed latter associated to charge density wave (CDW), but no CDW yet found. Here we find kink in above room temperature (at 355 K) and show...
We report the fabrication of a conductive biomaterial based on engineered proteins and patterned gold nanoparticles to overcome challenge charge transport macroscopic protein-based materials. This approach has great value for bioelectronics.
To probe the quenching mechanisms under high current densities, current-voltage curves have been measured in $\mathrm{Y}{\mathrm{Ba}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7\ensuremath{-}\ensuremath{\delta}}$ thin film microbridges with widths lower than thermal diffusion length. This condition was obtained by using microbridge-widths $100\phantom{\rule{0.3em}{0ex}}\ensuremath{\mu}\mathrm{m}$ and stepped ramps of one millisecond step duration. Whereas flux-flow resistivity is found to be...
Using the Green's function of 3D heat equation, we develop an analytical account thermal behaviour superconducting films subjected to electrical currents larger than their critical current in absence applied magnetic field. Our model assumes homogeneity and density, besides coefficients employs parameters obtained by fitting experimental field - density characteristics at constant bath temperature. We derive both a tractable dynamic equation for real temperature film up supercritical J^\ast...
The out of plane electrical conductivity highly anisotropic Bi2Te3 films grown via electro-deposition process was determined using four probe current-voltage measurements performed on 4.6 - 7.2 μm thickness mesa structures with 80 120 diameters sandwiched between metallic film electrodes. A three-dimensional finite element model used to predict the electric field distribution in measured and take into account non-uniform current electrodes vicinity probes. finite-element modeling shows that...
We have designed, fabricated and tested a robust superconducting ratchet device based on topologically frustrated spin ice nanomagnets. The is made of magnetic Co honeycomb array embedded in Nb film. This three simple mechanisms: (i) the topology frustrates in-plane configurations yielding distribution charges which can be ordered or disordered with fields, following rules; (ii) local vertex magnetization, consists half vortex two charged Néel walls; (iii) interaction between vortices...
Controlling graphene's doping will be critically important for its incorporation into future electronic and optoelectronic devices. Noncovalent functionalization through adsorption of organic molecules on surface has proved to a promising route achieving p- or n-type doping. However, due the poor adhesion molecules, these tend desorb over time under standard environmental conditions in presence certain solvents. The resulting reversal achieved chemical is major obstacle using as noncovalent...
Abstract We present a simple nanodevice that can operate in two modes: i) non-volatile three-state memory and ii) reading device. The retain three well defined states −1, 0 +1 second mode as sensor for external magnetic fields. is fabricated with an array of ordered triangular-shaped nanomagnets embedded superconducting thin film gown on Si substrates. device runs based the combination vortex ratchet effect (superconducting film) out plane magnetization (nanomagnets). input signals are ac...
Abstract In recent years, the understanding of bactericidal mechanisms natural surfaces has received great attention to unravel their design principles for development next‐generation mechano‐bactericidal surfaces. Due difficulty in characterizing bacteria–nanostructure interface, many aspects physical interaction between bacteria and surface, underlying mechanisms, remain unclear. This study focuses on evaluating dynamics process case moth‐eye bioinspired topography relation strain...
High-temperature superconducting microbridges implemented with YBa 2 Cu 3 O 7-δ thin-films are shown to be possible fault current limiters for microelectronic devices some elements working at temperatures below the critical temperature and, simultaneously, under very low power conditions (below 1 W).This is case in important applications of superconductors as SQUID based electronics, and technologies communication or infrared detectors.In this paper it that good thermal behavior these...
We report measurements at zero applied magnetic field of the characteristic curves (E-J) in Y1Ba2Cu3O7-δ thin films high current density regime, up to densities which induce transition normal state. To minimize spurious heating effects due Joule dissipation, E-J were measured with a pulse technique and samples submerged liquid nitrogen bath, changing temperature by varying vapour pressure. This experimental set-up allows us observe not only abrupt voltage jump appearing J* much larger...