A5068659923- Ferroelectric and Piezoelectric Materials
- Magnetic and transport properties of perovskites and related materials
- Electronic and Structural Properties of Oxides
- Multiferroics and related materials
- Advanced Condensed Matter Physics
- Acoustic Wave Resonator Technologies
- Photorefractive and Nonlinear Optics
- Physics of Superconductivity and Magnetism
- COVID-19 epidemiological studies
- COVID-19 Pandemic Impacts
- Digital Transformation in Industry
- COVID-19 impact on air quality
- IoT-based Smart Home Systems
- Perovskite Materials and Applications
- Context-Aware Activity Recognition Systems
- Rare-earth and actinide compounds
- Photochromic and Fluorescence Chemistry
- Smart Parking Systems Research
- Skin Diseases and Diabetes
- Cloud Computing and Resource Management
- Semiconductor materials and devices
- Software System Performance and Reliability
- Nonlinear Optical Materials Studies
- Long-Term Effects of COVID-19
- Ga2O3 and related materials
Institut Català de Nanociència i Nanotecnologia
2022-2024
Institut de Ciència de Materials de Barcelona
2023-2024
Instituto de Ciencia de Materiales de Sevilla
2024
ETH Zurich
2015-2023
University of Zurich
2020-2022
University of Geneva
2021-2022
TU Wien
2022
Paul Scherrer Institute
2021
Swiss Light Source
2021
University of Salento
2013
Metal halide semiconductors with perovskite crystal structures have recently emerged as highly promising optoelectronic materials. Despite the recent surge of reports on microcrystalline, thin-film and bulk single-crystalline metal halides, very little is known about photophysics halides in form uniform, size-tunable nanocrystals. Here we report low-threshold amplified spontaneous emission lasing from ∼10 nm monodisperse colloidal nanocrystals caesium lead perovskites CsPbX3 (X=Cl, Br or I,...
The success of oxide electronics depends on the ability to design functional properties such as ferroelectricity with atomic accuracy. However, despite tremendous advances in ferroelectric heterostructures, development towards multilevel architectures precise layer-by-layer command over polarization is impeded by lack continuous control balance electrostatics, strain, chemistry and film thickness during growth. Moreover, deeper layers becomes inaccessible when these are buried ongoing...
An optical probe of the ferroelectric domain distribution and manipulation in BiFeO3 thin films is reported using second harmonic generation. A unique relation between its integral symmetry established. The signature even resolved when film covered by a top electrode. effect voltage-induced switching imaged.
Non-Ising-like 180° ferroelectric domain wall architecture and distribution in tetragonal PbZrxTi1−xO3 thin films are probed using a combination of optical second harmonic generation scanning transmission electron microscopy. In the remnant state, specific nonlinear signature tilted walls corresponding to mixed Ising–Néel-type rotation polarization across is shown. As service our authors readers, this journal provides supporting information supplied by authors. Such materials peer reviewed...
We statistically investigate the Coronavirus Disease 19 (COVID-19) pandemic, which became particularly invasive in Italy March 2020. show that high apparent lethality or case fatality ratio (CFR) observed Italy, as compared with other countries, is likely biased by a strong underestimation of number infection cases. To give more realistic estimate COVID-19, we use actual (March 2020) estimates (IFR) pandemic based on minimum CFR and analyze data obtained from Diamond Princess cruise ship,...
Forthcoming low-energy consumption oxide electronics rely on the deterministic control of ferroelectric and multiferroic domain states at nanoscale. In this review, we address recent progress in field investigation ferroic order thin films heterostructures, with a focus non-invasive optical second harmonic generation (SHG). For more than 50 years, SHG has served as an established technique for probing bulk materials. Here, will survey specific new aspects introduced to ferroelectrics...
We identify a transient enhancement of the depolarizing field, leading to an unexpected quench net polarization, during growth prototypical metal-ferroelectric-metal epitaxial system made BaTiO_{3} and SrRuO_{3}. Reduced conductivity and, hence, charge screening efficiency in early stage SrRuO_{3} top electrode promotes breakdown ferroelectric into domains. demonstrate how thermal annealing procedure can recover single-domain state. By tracking polarization state situ, using optical second...
The properties of functional oxide heterostructures are strongly influenced by the physics governing their interfaces. Modern deposition techniques allow us to accurately engineer interface through growth atomically precise heterostructures. This enables minute control over electronic, magnetic, and structural characteristics, which in turn allows for tuning can even lead emergence not present individual heterostructure components. Here, we investigate magnetic tailor-made superlattices...
In recent years, due the improvement of humans' living standard, smart homes are receiving an increasing interest. They can provide several useful services such as support for elderly and disabled people, access control, environmental monitoring, home automation. Furthermore, with widespread diffusion mobile devices (i.e., smartphones, tablets) their integration new auto-identification technologies (such NFC technology), need to control manage through these is increasing. this context, main...
Process Industry is one of the leading sectors world economy, characterized however by intense environmental impact, and very high-energy consumption. Despite a traditional low innovation pace in PI, recent years strong push at worldwide level towards dual objective improving efficiency plants quality products, significantly reducing consumption electricity CO2 emissions has taken momentum. Digital Technologies (namely Smart Embedded Systems, IoT, Data, AI Edge-to-Cloud Technologies) are...
Abstract Magnetic frustration is a route for novel ground states, including spin liquids and ices. Such can be introduced through either lattice geometry or incompatible exchange interactions. Here, we find that epitaxial strain an effective tool tuning antiferromagnetic interactions in square-lattice system. By studying the magnon excitations La 2 NiO 4 films using resonant inelastic x-ray scattering, show displays substantial dispersion along zone boundary, at energies depend on of film’s...
We investigate the ferroelectric domain architecture and its operando response to an external electric field in ${\mathrm{BaTiO}}_{3}$-based electro-optic heterostructures integrated on silicon. By noninvasive optical second-harmonic generation, we identify preexistence of in-plane ($a$-) domains dispersed within a predominantly out-of-plane- ($c$-) oriented matrix. Monitoring poling behavior respective populations, show that spontaneous polarization these $a$-domains lack predominant...
By a combination of optical second harmonic generation and transport measurements, we have investigated interfaces formed by either crystalline or amorphous thin films LaAlO3 grown on TiO2-terminated SrTiO3(001) substrates. Our approach aims at disentangling the relative role intrinsic extrinsic doping mechanisms in formation two-dimensional electron gas. The different nature two is revealed when comparing sample response variation as function temperature during annealing air. However,...
We statistically investigate the Coronavirus Disease 19 (hereinafter Covid-19) epidemics, which is particularly invasive in Italy. show that high apparent mortality (or Case Fatality Ratio, CFR) observed Italy, as compared with other countries, likely biased by a strong underestimation of infected cases. To give more realistic estimate Covid-19, we use most recent estimates IFR (Infection Ratio) epidemic, based on minimum CFR, and furthermore analyse data obtained from ship Diamond Princess,...
Repeatable and reversible switching of magnetization by an electric field at room temperature is a prime goal multiferroics research, was recently achieved in BiFeO${}_{3}$/Co${}_{0.9}$Fe${}_{0.1}$ heterostructures. Unfortunately, the mechanism this magnetoelectric process remain largely unexplored, as accessing buried BiFeO${}_{3}$ domain state difficult. The authors use nondestructive optical method plus magnetic force microscopy to access details system's poling dynamics...
Charge-transfer phenomena at heterointerfaces are a promising pathway to engineer functionalities absent in bulk materials but can also lead degraded properties ultrathin films. Mitigating such undesired effects with an interlayer reshapes the interface architecture, restricting its operability. Therefore, developing less-invasive methods control charge transfer will be beneficial. Here, appropriate top-interface design allows for remote manipulation of configuration buried and concurrent...
The recent advancements in the industrial communities which have taken place from 2011 and are nowadays referenced as "Industry 4.0" allowed scientific community to highlight benefits of data-based approaches when dealing with operations. most impressive outcomes, particular, leveraged on tools implementing Machine Learning algorithms, gave companies new tool understand current future statuses operations processes through a data-driven approach. These often rely historical data can indeed...
The field of oxide spintronics can strongly benefit from the establishment robust ferromagnetic insulators with near room-temperature Curie temperature. Here we investigate structural, electronic, and magnetic properties atomically-precise epitaxially-strained thin films double perovskite La$_2$NiMnO$_6$ (LNMO) grown by off-axis radio-frequency magnetron sputtering. We find that retain both a strong insulating behavior bulk-like temperature in order 280 K, nearly independently epitaxial...
The ability to prepare single crystalline complex oxide freestanding membranes has opened a new playground access phases and functionalities not available when they are epitaxially bound the substrates. water-soluble Sr3Al2O6 (SAO) sacrificial layer approach proven be one of most promising pathways wide variety membranes, typically by high vacuum deposition techniques. Here, we present solution processing, also named chemical (CSD), as cost-effective alternative technique identifying main...
By combining transport measurements and optical second harmonic generation, we have investigated heterostructures formed between crystalline thin films of LaAlO3, with varying stoichiometry TiO2-terminated SrTiO3(001) substrates. Optical generation directly probes the polarity these heterostructures, thus complementing data. The growth temperature are found to be critical parameters for controlling both interfacial conductivity heterostructure polarity. In agreement previous work, all...
Abstract The discovery of superconductivity in doped infinite‐layer nickelate thin films has brought increased attention to the behavior perovskite phase. Despite this interest, majority existing studies pertain hole‐doped rare‐earth films, while most electron‐doping have been performed on bulk materials so far. To tackle imbalance, a detailed study that addresses doping NdNiO 3 using A‐site substitution is presented, Pb as dopant and taking advantage its valence‐skipping nature. Through...
Abstract We statistically investigate the Coronavirus Disease 19 (hereinafter Covid-19) epidemics, which is particularly invasive in Italy. show that high apparent mortality (or Case Fatality Ratio, CFR) observed Italy, as compared with other countries, likely biased by a strong underestimation of infected cases. To give more realistic estimate Covid-19, we use most recent estimates IFR (Infection Ratio) epidemic, based on minimum CFR, and furthermore analyse data obtained from ship Diamond...
Controlling the domain arrangement in a ferroelectric material is key to accessing its functional properties. However, when thin film inserted into multilayer device architecture, conventional characterization techniques provide limited access buried distribution of polar states. Here we show that combination nondestructive remote probing by nonlinear optics and symmetry analysis allows unique distinction orientations coexisting tetragonal films. We quantify volumetric ratio between in-plane...
The layered structure of superconducting cuprates is considered to be a key ingredient achieve high transition temperatures. In this work, we investigate the possibility doping SrCuO2 infinite-layer compound by inserting additional oxygen into its structure. We observe that epitaxially stabilized in thin films grown pulsed laser deposition pure O2. Increasing oxidizing power introducing ozone during growth leads different phase with an elongated c axis. Scanning transmission electron...