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We present a new procedure that takes advantage of the magnetic flux quantization of superconducting vortices to calibrate the magnetic properties of tips for magnetic force microscopy (MFM). Indeed, a superconducting vortex, whose quantized flux is dependent upon Plank constant, speed of light and electron charge, behaves as a very well defined magnetic reference object. The proposed calibration procedure has been tested on new and worn tips and shows that the monopole point-like approximation of the probe is a reliable model. This procedure has been then applied to perform quantitative MFM experiments on a soft ferromagnetic thin film of permalloy, leading to the determination of the local out-of-plane component of the canted magnetization, together with its spatial variations across a few µm2 scan area.
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BACKGROUND: Morality and moral reasoning develop over the course of life, but such development may encounter obstacles. Psycho-educational interventions could be designed to improve moral reasoning and attitude towards prosociality. In the last decades, many interventions employed digital technologies ranging from multicomponent online platforms to serious games and virtual reality, making use of interactivity and immersive properties that could make moral stimuli more engaging. AIMS: This study aimed at reviewing the literature on digital interventions to support morality and moral reasoning, carried out with subjects of all age groups. METHODS AND RESULTS: Two electronic databases were searched with a systematic approach, and retrieved publications were scanned by authors against inclusion criteria. Twenty-three articles were reviewed. In general, the literature describes encouraging results of digital interventions to support morality. Moreover, a huge variety of morality conceptualizations emerged across various contexts (e.g., professional, school and sports) as well as various outcome measurements (e.g., change in attitudes and change in behaviour). CONCLUSIONS: Effectiveness of digital interventions may relate to immersive and interactive simulations in particular, in that they allow participants not only to learn about moral rules and principles but also to actively exercise their own morality to make decisions. Future research may build on the present scoping review to analyse specific types of interventions' effectiveness with a meta-analytical approach.
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Proximity effects in superconducting normal (SN) material heterostructures with metals and semiconductors have long been observed and theoretically described in terms of Cooper pair wave functions and Andreev reflections. Whereas the semiconducting N-layer materials in the proximity experiments to date have been doped and tens of nanometers thick, we present here a proximity tunneling study involving a pristine single-layer transition-metal dichalcogenide film of MoS2 placed on top of a Pb thin film. Scanning tunneling microscopy and spectroscopy experiments together with parallel theoretical analysis based on electronic structure calculations and Green's function modeling allow us to unveil a two-step process in which MoS2 first becomes metallic and then is induced into becoming a conventional s-wave Bardeen-Cooper-Schrieffer-type superconductor. The lattice mismatch between the MoS2 overlayer and the Pb substrate is found to give rise to a topographic moiré pattern. Even though the induced gap appears uniform in location, the coherence peak height of the tunneling spectra is modulated spatially into a moiré pattern that is similar to but shifted with respect to the moiré pattern observed in topography. The aforementioned modulation is shown to originate from the atomic-scale structure of the SN interface and the nature of local atomic orbitals that are involved in generating the local pairing potential. Our study indicates that the local modulation of induced superconductivity in MoS2 could be controlled via geometrical tuning, and it thus shows promise toward the integration of monolayer superconductors into next-generation functional electronic devices by exploiting proximity-effect control of quantum phases.
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The ability to control nanoscale electronic properties by introducing macroscopic strain is of critical importance for the implementation of two-dimensional (2D) materials into flexible electronics and next-generation strain engineering devices. In this work, we correlate the atomic-scale lattice deformation with a systematic macroscopic bending of monolayer molybdenum disulfide films by using scanning tunneling microscopy and spectroscopy implemented with a custom-built sample holder to control the strain. Using this technique, we are able to induce strains of up to 3% before slipping effects take place and relaxation mechanisms prevail. We find a reduction of the quasiparticle bandgap of about 400 meV per percent local strain measured with a minimum gap of 1.2 eV. Furthermore, unintentional nanoscale strain relaxation of van der Waals monolayer sheets can negatively impact strain engineered device performance. Here we investigate such strain relaxation mechanisms that include one-dimensional ripples and 2D wrinkles which alter the spatial electronic density of states and strain distribution on the atomic scale.
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Recent progress in the synthesis of monolayer MoS2, a two-dimensional direct band-gap semiconductor, is paving new pathways toward atomically thin electronics. Despite the large amount of literature, fundamental gaps remain in understanding electronic properties at the nanoscale. Here, we report a study of highly crystalline islands of MoS2 grown via a refined chemical vapor deposition synthesis technique. Using high resolution scanning tunneling microscopy and spectroscopy (STM/STS), photoemission electron microscopy/spectroscopy (PEEM) and µ-ARPES we investigate the electronic properties of MoS2 as a function of the number of layers at the nanoscale and show in-depth how the band gap is affected by a shift of the valence band edge as a function of the layer number. Green's function based electronic structure calculations were carried out in order to shed light on the mechanism underlying the observed bandgap reduction with increasing thickness, and the role of the interfacial Sulphur atoms is clarified. Our study, which gives new insight into the variation of electronic properties of MoS2 films with thickness bears directly on junction properties of MoS2, and thus impacts electronics application of MoS2.
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Abstract This research reports on the first narrative review of Biodanza's effects on health and wellbeing. The review explores manuscripts in four languages (i.e., Italian, Spanish, Portuguese and English) and includes more than 200 documents. The protocol was evaluated according to the most recent SANRA guidelines and Kappa statistics. The research shows that the majority of the studies had descriptive approaches (29.2%), followed by robust control trials (26.8%), while the remaining studies included both narrative and systematic reviews (19.5%) as well as pilot (14.6%), ethnographic (7.3%), and assessment (2.4%) studies. The research team concluded that Biodanza is an innovative intervention to improve clinical and socio-pedagogic outcomes in different cohorts (including kindergartens and chronic senile-disease patients) and should be fostered for additional trials along or in comparison with alternative interventions (such as Bodytasking).
Resumo A pesquisa tem como objetivo relatar a primeira revisão narrativa dos efeitos da Biodanza na saúde e no bem-estar. A revisão explora manuscritos em quatro idiomas (italiano, espanhol, português e inglês) e incluiu mais de 200 documentos. O protocolo foi avaliado de acordo com as mais recentes diretrizes SANRA e estatísticas Kappa. A pesquisa mostra que a maioria dos estudos teve abordagem descritiva (29,2%), seguida de ensaios de controle robusto (26,8%). Enquanto o restante incluía revisões narrativas e sistemáticas (19,5%), estudos-piloto (14,6%), etnográficos (7,3%) e diagnósticos (2,4%). A equipe de pesquisa concluiu que a Biodanza é uma intervenção inovadora para melhorar os resultados clínicos e sociopedagógicos em diferentes coortes (incluindo jardins de infância e com pacientes com doença senil crônica) e deve ser promovida para ensaios adicionais junto ou em comparação com intervenções alternativas (como Bodytasking).
Resumen La investigación tiene como objetivo relatar la primera revisión narrativa de los efectos de la Biodanza en la salud y el bienestar. La revisión explora manuscritos en cuatro idiomas (italiano, español, portugués e inglés) e incluye más de 200 documentos. El protocolo se evaluó de acuerdo con las estadísticas más recientes SANRA directrices y Kappa. La investigación muestra que la mayoría de los estudios tuvo un enfoque descriptivo (29,2%), seguido por ensayos de control robusto (26,8%). El resto incluyó revisiones narrativas y sistemáticas (19,5%), piloto (14,6%), etnografía (7,3%) y estudios de diagnóstico (2,4%). El equipo de investigación concluyó que Biodanza es una intervención innovadora para mejorar los resultados clínicos y sociopedagógicos en diferentes cohortes (incluidos jardines infantiles y con pacientes con enfermedad senil crónica) y debe fomentarse para ensayos adicionales junto o en comparación con intervenciones alternativas (como Bodytasking).