Two-mode behavior for the E2g broad band in Mg(B1-xCx)2

DSpace/Manakin Repository

Show simple item record

dc.contributor.author Parisiades, P en
dc.contributor.author Lampakis, D en
dc.contributor.author Palles, D en
dc.contributor.author Liarokapis, E en
dc.contributor.author Zhigadlo, ND en
dc.contributor.author Katrych, S en
dc.contributor.author Karpinski, J en
dc.date.accessioned 2014-03-01T01:29:25Z
dc.date.available 2014-03-01T01:29:25Z
dc.date.issued 2008 en
dc.identifier.issn 0921-4534 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/19257
dc.subject MgB2 en
dc.subject Raman spectroscopy en
dc.subject Superconductivity en
dc.subject.classification Physics, Applied en
dc.subject.other Crystallography en
dc.subject.other Raman studies en
dc.subject.other Systematic (CO) en
dc.subject.other Two mode behavior en
dc.subject.other Single crystals en
dc.title Two-mode behavior for the E2g broad band in Mg(B1-xCx)2 en
heal.type journalArticle en
heal.identifier.primary 10.1016/j.physc.2008.05.219 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.physc.2008.05.219 en
heal.language English en
heal.publicationDate 2008 en
heal.abstract A systematic Raman study has been carried out on single crystals of Mg(B1-x,C-x)(2) with carbon concentrations in the range of x = 0.0-0.15. We have found remarkable differentiations of the Raman spectra with doping. Even with small amounts of carbon substitution (x = 0.027) the E-2g-symmetry broad band at similar to 600cm(-1) (for pure MgB2) diminishes and new modes appear of the approximate A(1g)/B-1g (similar to 750 cm(-1)) and E-2g (similar to 850 cm(-1)) symmetries, though the transition temperature is only slightly reduced (< 2 K). The broadband does not evolve continuously into the mode of same symmetry at similar to 850 cm(-1), as assumed by other investigators, The practical disappearance of the original similar to 600 cm(-1) mode at x similar or equal to 0.08 coincides with the fast reduction of T-c. The doping dependence of the phonons indicates a two-mode behavior, which could be driven by the 2D-3D electronic topological transition and associated with a possible nanoscale phase separation. (c) 2008 Elsevier B.V. All rights reserved. en
heal.publisher ELSEVIER SCIENCE BV en
heal.journalName Physica C: Superconductivity and its Applications en
dc.identifier.doi 10.1016/j.physc.2008.05.219 en
dc.identifier.isi ISI:000258817400013 en
dc.identifier.volume 468 en
dc.identifier.issue 14 en
dc.identifier.spage 1064 en
dc.identifier.epage 1069 en

Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record