Properties of ultra-thin vanadium layers in V/Ru superlattices (Articolo in rivista)

Type
Label
  • Properties of ultra-thin vanadium layers in V/Ru superlattices (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Liscio, F; Maret, M; Meneghini, C; Hazemann, JL; Albrecht, M (2007)
    Properties of ultra-thin vanadium layers in V/Ru superlattices
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Liscio, F; Maret, M; Meneghini, C; Hazemann, JL; Albrecht, M (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 19 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Inst Natl Polytech Grenoble, CNRS, Sci & Ingenierie Mat Procedes, F-38402 St Martin Dheres, France; Univ Rome, Dipartimento Fis, I-00416 Rome, Italy; OGG GILDA, INFM, CNR, Grenoble, France; CNRS, MCMG, Inst Neel, F-38042 Grenoble, France; Univ Konstanz, Dept Phys, D-78457 Constance, Germany (literal)
Titolo
  • Properties of ultra-thin vanadium layers in V/Ru superlattices (literal)
Abstract
  • The properties of ultra-thin vanadium layers in V/Ru(0001) superlattices grown by molecular beam epitaxy were studied. The atomic structure of V was investigated by various methods including reflection high-energy electron diffraction (RHEED), x-ray diffraction (XRD) and polarized x-ray-absorption fine structure (PXAFS). It appears that, for up to three atomic layers, V adopts a slightly distorted hexagonal-close-packed (hcp) structure induced by pseudomorphic growth on Ru(0001). By increasing the V thickness to four atomic layers, this structure almost completely relaxes towards the body-centered-cubic (bcc) bulk structure. This sharp structural transition is also manifested in the electronic properties. A reduced superconducting transition temperature between 0.6 and 1.05 K was found in the bcc V/hcp Ru superlattice, while superconductivity is quenched in the superlattice with hexagonal V. This behavior might be linked to the existence of a ferromagnetic ground state of the metastable V induced by the hybridization of the d-bands at the hcp V/Ru interface, as predicted from first-principles density-functional theory. (literal)
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