A5037107939- Physics of Superconductivity and Magnetism
- Magnetic properties of thin films
- Quantum and electron transport phenomena
- Theoretical and Computational Physics
- Atomic and Subatomic Physics Research
- Quantum optics and atomic interactions
- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Particle Detector Development and Performance
- Advanced Electron Microscopy Techniques and Applications
- Advanced NMR Techniques and Applications
- Superconducting and THz Device Technology
- Magnetic Properties of Alloys
- Quantum Computing Algorithms and Architecture
- Mechanical and Optical Resonators
- Quantum, superfluid, helium dynamics
- Superconducting Materials and Applications
- Radio Frequency Integrated Circuit Design
- Induction Heating and Inverter Technology
- Iron-based superconductors research
- Silicon Carbide Semiconductor Technologies
- stochastic dynamics and bifurcation
- Quantum chaos and dynamical systems
- Particle physics theoretical and experimental studies
- Rare-earth and actinide compounds
Instituto de Nanociencia y Materiales de Aragón
2022-2023
Universidad de Zaragoza
2022-2023
Madrid Institute for Advanced Studies
2018-2023
University of Science and Technology of China
2023
Beijing Academy of Quantum Information Sciences
2023
Hefei National Center for Physical Sciences at Nanoscale
2023
Universidad Complutense de Madrid
2016
Abstract Nuclear spins are candidates to encode qubits or qudits due their isolation from magnetic noise and potentially long coherence times. However, weak coupling external stimuli makes them hard integrate into circuit quantum electrodynamics architectures, the leading technology for solid-state processors. Here, we study of 173 Yb(III) nuclear spin states in an [Yb(trensal)] molecule superconducting cavities. Experiments have been performed on magnetically dilute single crystals placed...
Cavity photons and ferromagnetic spin excitations can exchange information coherently in hybrid architectures, at speeds set by their mutual coupling strength. Speed enhancement is usually achieved optimizing the geometry of electromagnetic cavity. Here we show that ferromagnet also plays a role, setting fundamental frequency magnonic resonator. Using focused ion-beam patterning, vary aspect ratio different Permalloy samples reaching operation frequencies above 10 GHz while working low...
Superconducting resonators play a crucial role in developing forthcoming quantum computing schemes. The complete integration of molecular spin-based bits with superconducting still requires further developments, notably maintaining low-loss resonances and high quality factors. In this work, we have developed device combining niobium (Nb) circuit 10 nm gold (Au) capping layer, which supports low microwave losses enables new functionalities such as the magnetic molecules into solid-state...
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...
Superconducting films in contact with non-superconducting regular arrays can exhibit commensurability effects between the vortex lattice and unit cell of pinning array. These matching yield a slowdown flow corresponding dissipation decrease. The superconducting samples are Nb grown on Si substrates. We have studied these array top, embedded or threading using different materials (Si, Cu, Ni, Py dots fabricated Co/Pd multilayers). hybrids allow studying contribution potentials to effects....
We investigated the vortex phase diagram of needle shaped high quality NiBi3 single crystals by transport measurements. The current is applied along crystalline b-axis this intermetallic quasi-1D BCS superconductor. show a Ginzburg-Levanchuk (Gi) parameter few orders magnitude larger than other low Tc superconductors. Vortex diagram, critical currents and pinning forces have been extracted from experimental data. main findings are: 1) Enhancement liquid in comparison with superconductors, 2)...
A central goal in quantum technologies is to maximize $G{T}_{2}$, where $G$ stands for the coupling of a qubit control and readout signals ${T}_{2}$ qubit's coherence time. This challenging, as increasing (e.g., by more strongly external stimuli) often leads deleterious effects on ${T}_{2}$. Here, we study pure magnetically diluted crystals ${\mathrm{Ho}\mathrm{W}}_{10}$ magnetic clusters microwave superconducting coplanar waveguides. Absorption lines give broadband picture energy level...
Lumped-element kinetic inductance detectors (LEKIDs) based on sawtooth inductors for <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$W$</tex-math> </inline-formula> -band are presented in this article. A careful analysis is carried out the cross-polarization inductor geometry, which brings absorption of nondesired notation="LaTeX">$E$</tex-math> -field component an incident wave plane. The proposed...
Nuclear spins are candidates to encode qubits or qudits due their isolation from magnetic noise and potentially long coherence times. However, weak coupling external stimuli makes them hard integrate into circuit-QED architectures, the leading technology for solid-state quantum processors. Here, we study of $^{173}$Yb(III) nuclear spin states in an [Yb(trensal)] molecule superconducting cavities. Experiments have been performed on magnetically diluted single crystals placed inductors...
Abstract A controlled local enhancement of superconductivity yields unexpected modifications in the vortex dynamics. This has been achieved by designing an array superconducting Nb nanostructures embedded a V film. The most remarkable findings are: (i) vanishing main commensurability effect between lattice and unit cell, (ii) hysteretic behavior dynamics, (iii) broadening liquid phase (iv) strong softening lattice. These effects can be they quenched reducing performance applying in-plane...
Abstract We have studied two nanomagnet systems with strong (Co/Pd multilayers) and weak (NdCo alloy films) stray magnetic fields by probing the out-of-plane states superconducting vortices. The hybrid samples are made of array nanomagnets embedded in Nb thin films. vortex motion detects relevant state features, since vortices able to discriminate between different field strengths directions. usual matching effect lattice periodic pinning can be quenched means disorder potentials at random....
The development of multilayered materials with engineered magnetic properties compels a deep knowledge physical at the atomic scale. anisotropy is key property in these materials. This work accounts for energy and its correlation Co/Pd multilayers number repetitions. Magnetometry measurements confirm stronger perpendicular energies as repetitions increases up to 40. However, intrinsic anisotropy, related Co–Pd orbital hybridization spin–orbit coupling, saturates 15 finding supported by x-ray...
A central goal in quantum technologies is to maximize $G$T$_{2}$, where $G$ stands for the coupling of a qubit control and readout signals T$_{2}$ qubit's coherence time. This challenging, as increasing (e.g. by more strongly external stimuli) often leads deleterious effects on T$_{2}$. Here, we study pure magnetically diluted crystals HoW$_{10}$ magnetic clusters microwave superconducting coplanar waveguides. Absorption lines give broadband picture energy level scheme and, particular,...
Little-Parks effect names the oscillations in superconducting critical temperature as a function of magnetic field. This is related to geometry sample. In this work, we show that can be enhanced and manipulated by inclusion nanostructures with perpendicular magnetization. These nanodots generate stray fields enough strength produce vortex-antivortex pairs. So that, L-P deviation from usual geometrical constrictions due interplay between local vortices. Moreover, compare our results low-stray...
Cavity photons and ferromagnetic spins excitations can exchange information coherently in hybrid architectures, at speeds set by their mutual coupling strength. Speed enhancement is usually achieved optimizing the geometry of electromagnetic cavity. Here we show that ferromagnet plays also an important role, setting fundamental frequency magnonic resonator. Using focused ion beam patterning, vary aspect ratio different Permalloy samples reaching operation frequencies above 10 GHz while...