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Nanoscale spatial non-homogeneity of 3D in Delta pi Mg0.9Al0.1B2 single crystals (Articolo in rivista)
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- Label
- Nanoscale spatial non-homogeneity of 3D in Delta pi Mg0.9Al0.1B2 single crystals (Articolo in rivista) (literal)
- Anno
- 2007-01-01T00:00:00+01:00 (literal)
- Alternative label
Giubileo, F; Bobba, F; Scarfato, A; Roditchev, D; Zhigadlo, N; Karpinski, J; Cucolo, AM (2007)
Nanoscale spatial non-homogeneity of 3D in Delta pi Mg0.9Al0.1B2 single crystals
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Giubileo, F; Bobba, F; Scarfato, A; Roditchev, D; Zhigadlo, N; Karpinski, J; Cucolo, AM (literal)
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Univ Salerno, CNR, INFM, Dipartimento Fis ER Caianiello Lab Reg SUPERMAT, I-84081 Baronissi, Italy; Univ Paris 06, CNRS, UMR 7588, Inst Nanosci Paris INSP, Paris, France; ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland (literal)
- Titolo
- Nanoscale spatial non-homogeneity of 3D in Delta pi Mg0.9Al0.1B2 single crystals (literal)
- Abstract
- We have performed I(V) and dI/dV(V) measurements on high quality Mg0.9Al0.1B2 single crystals by means of a variable temperature scanning tunneling spectroscopy (STS) working in magnetic field up to 7 T. c-axis tunneling showed a single gap, probing the three-dimensional Dp that appeared highly non-homogeneous in its spatial distribution on nanometer scale, with an amplitude between 1.5 meV and 2.3 meV. Temperature and magnetic field dependence of the conductance spectra were studied in S-I-N configuration as well as in S-I-S configuration, after pushing the Pt/Ir tip in the sample to capture a superconducting grain at the very apex of the tip. For the largest energy gap (2.3 meV), we found H-c2 similar to 3 T, i.e., a 25% raising with respect to what observed in the pure crystal. (C) 2007 Elsevier B.V. All rights reserved. (literal)
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