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dc.contributor.authorYildiz, A.
dc.contributor.authorLisesivdin, S. B.
dc.contributor.authorKasap, M.
dc.contributor.authorMardare, D.
dc.date.accessioned2019-11-24T20:37:47Z
dc.date.available2019-11-24T20:37:47Z
dc.date.issued2009
dc.identifier.issn0921-4526
dc.identifier.issn1873-2135
dc.identifier.urihttps://dx.doi.org/10.1016/j.physb.2008.12.034
dc.identifier.urihttps://hdl.handle.net/20.500.12513/2418
dc.descriptionWOS: 000265886100073en_US
dc.description.abstractTransport properties of Nb-doped titanium oxide (TiO2) thin film, obtained by a RF sputtering technique, have been investigated by means of the electrical conductivity and the Seebeck coefficient as a function of temperature (13-425 K). At high temperatures (T>325 K), temperature dependent behaviors of the electrical conductivity and the Seebeck coefficient confirm that the transport mechanism is the non-adiabatic small polaron hopping type. An excellent agreement between the theoretical and the experimental values of non-adiabatic polaron hopping energy (W-H approximate to 0.3eV) is obtained. The conductivity follows the Mott's variable range hopping conduction (VRH) at the temperature range of 200-325K, while it exhibits a temperature-independent behavior at low temperatures (T<200K). Various physical parameters of the present sample such as polaron radius, effective dielectric constant, polaron hopping energy, density of states at the Fermi level, polaron band width and polaron coupling constant are determined using small polaron hopping model. (C) 2009 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipRomanian Ministry of Education [A 27/2007, GAR 37/2007]; TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK); ANCSTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [TBAG-U/220 (107T584)]en_US
dc.description.sponsorshipOne of the authors (D. Mardare) would like to thank Professor F. Levy from Institute of Applied Physics, Polytechnic Federal School of Lausanne, Switzerland for providing the necessary laboratory facilities to carry out a part of this investigation. This work was partially supported by Romanian Ministry of Education and Research through Grant A 27/2007 and also by Romanian Academy through GAR 37/2007. This work was also supported by TUBITAK and ANCS under Project no TBAG-U/220 (107T584).en_US
dc.language.isoengen_US
dc.publisherELSEVIER SCIENCE BVen_US
dc.relation.isversionof10.1016/j.physb.2008.12.034en_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectElectrical conductivityen_US
dc.subjectSmall polaron hoppingen_US
dc.subjectTiO2en_US
dc.titleNon-adiabatic small polaron hopping conduction in Nb-doped TiO2 thin filmen_US
dc.typearticleen_US
dc.relation.journalPHYSICA B-CONDENSED MATTERen_US
dc.contributor.departmentKırşehir Ahi Evran Üniversitesi, Fen-Edebiyat Fakültesi, Fizik Bölümüen_US
dc.identifier.volume404en_US
dc.identifier.issue8.Kasen_US
dc.identifier.startpage1423en_US
dc.identifier.endpage1426en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US


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