Sc substitution for Mg in MgB2: effects on Tc and Kohn anomaly

Simple item page
dc.creatorAgrestini, S.
dc.creatorMetallo, C.
dc.creatorFilippi, M.
dc.creatorSimonelli, L.
dc.creatorCampi, G.
dc.creatorSanipoli, C.
dc.creatorLiarokapis, E.
dc.creatorDe Negri, S.
dc.creatorGiovannini, M.
dc.creatorSaccone, A.
dc.creatorLatini, A.
dc.creatorBianconi, A.
dc.date2004-08-04
dc.date.accessioned2026-07-07T10:06:15Z
dc.date.available2026-07-07T10:06:15Z
dc.descriptionHere we report synthesis and characterization of Mg_{1-x}Sc_{x}B_{2} (0.12<x<0.27) system, with critical temperature in the range of 30>T_{c}>6 K. We find that the Sc doping moves the chemical potential through the 2D/3D electronic topological transition (ETT) in the sigma band where the ``shape resonance" of interband pairing occurs. In the 3D regime beyond the ETT we observe a hardening of the E_{2g} Raman mode with a significant line-width narrowing due to suppression of the Kohn anomaly over the range 0<q<2k_{F}.
dc.description8 pages, 4 EPS figures, to be published in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/0408095
dc.identifierhttp://arxiv.org/abs/cond-mat/0408095
dc.identifierPhys. Rev. B 70, 134514 (2004)
dc.identifierdoi:10.1103/PhysRevB.70.134514
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/170261
dc.subjectSuperconductivity
dc.subjectMaterials Science
dc.titleSc substitution for Mg in MgB2: effects on Tc and Kohn anomaly
dc.typetext

Files

Collections

arXiv