0000000000671363

AUTHOR

Mar García-hernández

showing 3 related works from this author

Strong enhancement of superconductivity at high pressures within the charge-density-wave states of2H−TaS2and2H−TaSe2

2016

We present measurements of the superconducting and charge density wave critical temperatures (Tc and TCDW) as a function of pressure in the transition metal dichalchogenides 2H-TaSe2 and 2H-TaS2. Resistance and susceptibility measurements show that Tc increases from temperatures below 1 K up to 8.5 K at 9.5 GPa in 2H-TaS2 and 8.2 K at 23 GPa in 2H-TaSe2. We observe a kink in the pressure dependence of TCDW at about 4 GPa that we attribute to the lock-in transition from incommensurate CDW to commensurate CDW. Above this pressure, the commensurate TCDW slowly decreases coexisting with superconductivity within our full pressure range.

Pressure rangeSuperconductivityMaterials scienceTransition metalCondensed matter physics0103 physical sciences02 engineering and technologyPressure dependence021001 nanoscience & nanotechnology010306 general physics0210 nano-technology01 natural sciencesCharge density wavePhysical Review B
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Pulsed laser deposition of Sr2FeMoO6 thin films

2005

Abstract The effect of various deposition conditions and after-growth protocols on the magnetic and transport properties of Sr 2 FeMoO 6 films has been explored. It is found that the saturation magnetization and the magnetoresistance (MR) are dominated by the degree of cationic order, and the strain effects are clearly evidenced in a lower T C . The after-growth annealing of the films and the deposition of a buffer layer has been found to relax the film strains. This translates into a clear increase of the measured low-field magnetoresistance ratios.

Materials scienceColossal magnetoresistanceCondensed matter physicsMagnetoresistanceAnnealing (metallurgy)Cationic polymerizationDouble perovskiteThin filmCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsPulsed laser depositionJournal of Magnetism and Magnetic Materials
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Coherent coupling between vortex bound states and magnetic impurities in 2D layered superconductors

2021

Bound states in superconductors are expected to exhibit a spatially resolved electron-hole asymmetry which is the hallmark of their quantum nature. This asymmetry manifests as oscillations at the Fermi wavelength, which is usually tiny and thus washed out by thermal broadening or by scattering at defects. Here we demonstrate theoretically and confirm experimentally that, when coupled to magnetic impurities, bound states in a vortex core exhibit an emergent axial electron-hole asymmetry on a much longer scale, set by the coherence length. We study vortices in 2H-NbSe2 and in 2H-NbSe1.8S0.2 with magnetic impurities, characterizing these with detailed Hubbard-corrected density functional calcu…

Superconductivityelectronic-structureScienceGeneral Physics and AstronomyFOS: Physical sciences01 natural sciences7. Clean energyTopologyGeneral Biochemistry Genetics and Molecular BiologyArticle010305 fluids & plasmasMarie curieSuperconducting properties and materialsSuperconductivity (cond-mat.supr-con)Condensed Matter - Strongly Correlated ElectronsMagnetic properties and materialsOriganumCondensed Matter::Superconductivity0103 physical sciencesBound stateMesoscale and Nanoscale Physics (cond-mat.mes-hall)010306 general physicsSuperconductivitatMaterialsSuperconductivityPhysicsMultidisciplinaryStrongly Correlated Electrons (cond-mat.str-el)Condensed Matter - Mesoscale and Nanoscale Physicsmajorana fermionsCondensed Matter - SuperconductivityQcoreFísicaGeneral ChemistrylineHumanities
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