Phonons as a Probe of the Low Temperature Metal Insulator Transition in Na.75Co.95Ni.05O2

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dc.creatorPremila, M.
dc.creatorBharathi, A.
dc.creatorYasodha, P.
dc.creatorHariharan, N. Gayathri Y.
dc.creatorSundar, C. S.
dc.date2005-10-11
dc.date.accessioned2026-07-07T06:44:16Z
dc.date.available2026-07-07T06:44:16Z
dc.descriptionNickel substitution at the cobalt site in NaxCoO2 induces a Metal Insulator Transition (MIT) and the temperature at which this occurs (TMIT) increases with Ni content. Low temperature far infrared measurements on polycrystalline samples of Na0.75CoO2 and Na0.75Co0.95Ni0.05O2 (TMIT = ~ 150K) were carried out to look for signatures of this transition. While both the samples show an evident splitting of the high frequency Co-O mode on lowering the temperature, dramatic changes are observed in the low frequency sodium mode in Na0.75Co0.95Ni0.05O2 clearly pointing out to an ordering of the sodium ions in the low temperature insulating state.
dc.descriptionTo appear in Sol. St. Physics (India) Vol.50 (2005)
dc.identifierhttps://arxiv.org/abs/cond-mat/0510274
dc.identifierhttp://arxiv.org/abs/cond-mat/0510274
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/102723
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titlePhonons as a Probe of the Low Temperature Metal Insulator Transition in Na.75Co.95Ni.05O2
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