Docta Complutense
Open Access Institutional Repository of the Complutense University of Madrid, that compiles scientific production to promote the visibility and impact of Complutense research.
With the collaboration of the Ministerio de Ciencia e Innovación and the Spanish Foundation for Science and Technology (FECYT).
Recent Submissions
Electronic structure of Gd/W(110): from one atomic layer to bulk
(Applied Surface Science, 2026) González García, Álvaro Antonio; Álvarez Chico, Alejandro; Aramburu Merino, Nekane; Obando Guevara, Jairo; Gallego, Silvia; Atxitia, Unai; Cojocariu, Iulia; Jugovac, Matteo; Menteş, Tevfik Onur; Locatelli, Andrea; Mascaraque Susunaga, Arantzazu; González Barrio, Miguel Ángel
We investigate the growth, crystalline and electronic structure of ultrathin gadolinium (Gd) films deposited on a W(110) substrate, using a multi-modal approach that combines low energy electron diffraction (LEED) and microscopy (LEEM), together with laterally- and angle resolved photoemission spectroscopy (ARPES). We focus on the evolution from the monolayer to bulk-like behavior. The Gd lattice constant relaxes to its bulk value for a thickness of 3 Gd atomic layers (ML). ARPES measurements, combined with ab initio calculations, reveal a systematic progression of the Gd-derived electronic states with increasing thickness, with clear bulk-like features already at thicknesses of 3 ML, and a reduced influence of the substrate. This study provides a comprehensive ARPES and LEED investigation of Gd/W(110) across the ultrathin thickness range, filling a significant gap in the understanding of dimensional crossover in rare-earths. Our results shed new light on how the interplay between reduced dimensionality and substrate interaction shapes the behavior of ultrathin magnetic films, offering a model platform for exploring quantum size effects and correlation-driven phenomena in low-dimensional 4f systems.
Towards a more realistic description of nuclear effects in lepton-nucleus scattering
(2026) Franco Muñoz, Tania; González Jiménez, Raúl; Udías Moinelo, José Manuel
In recent years, neutrino physics has become one of the most active areas of scientific research.It has been firmly established that neutrinos oscillate and hence are massive particles. However, several fundamental questions related to them remain open, such as the neutrino mass hierarchy, the nature of the neutrino mass and charge-parity violation in the leptonic sector. Aiming at solving these puzzles, a next generation of accelerator-based neutrino oscillation experiments is being developed, leading to the precision era. These experiments require an unprecedented level of accuracy to succeed in determining neutrino properties. One of the main sources of systematic uncertainty arises from the modeling of neutrino interactions with the target nuclei. Therefore, achieving a precise description of these reactions has become one of the top challenges for theoretical nuclear physics. Neutrinos are produced in accelerator-based experiments as the decay products of successive reactions, resulting in broad energy fluxes. Hence, neutrino-nucleus interactions involve multiple reaction mechanisms, each dominating in different kinematic regimes, requiring robust models that properly describe these interactions over the whole experimental range. Among the possible interaction channels, our focus is placed on quasielastic scattering, which represents a significant contribution in both current and future neutrino oscillation experiments...
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