dc.contributor.author | Yildiz, A. | |
dc.contributor.author | Lisesivdin, S. B. | |
dc.contributor.author | Kasap, M. | |
dc.contributor.author | Mardare, D. | |
dc.date.accessioned | 2019-11-24T20:37:47Z | |
dc.date.available | 2019-11-24T20:37:47Z | |
dc.date.issued | 2009 | |
dc.identifier.issn | 0921-4526 | |
dc.identifier.issn | 1873-2135 | |
dc.identifier.uri | https://dx.doi.org/10.1016/j.physb.2008.12.034 | |
dc.identifier.uri | https://hdl.handle.net/20.500.12513/2418 | |
dc.description | WOS: 000265886100073 | en_US |
dc.description.abstract | Transport 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.sponsorship | Romanian 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.sponsorship | One 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.iso | eng | en_US |
dc.publisher | ELSEVIER SCIENCE BV | en_US |
dc.relation.isversionof | 10.1016/j.physb.2008.12.034 | en_US |
dc.rights | info:eu-repo/semantics/closedAccess | en_US |
dc.subject | Electrical conductivity | en_US |
dc.subject | Small polaron hopping | en_US |
dc.subject | TiO2 | en_US |
dc.title | Non-adiabatic small polaron hopping conduction in Nb-doped TiO2 thin film | en_US |
dc.type | article | en_US |
dc.relation.journal | PHYSICA B-CONDENSED MATTER | en_US |
dc.contributor.department | Kırşehir Ahi Evran Üniversitesi, Fen-Edebiyat Fakültesi, Fizik Bölümü | en_US |
dc.identifier.volume | 404 | en_US |
dc.identifier.issue | 8.Kas | en_US |
dc.identifier.startpage | 1423 | en_US |
dc.identifier.endpage | 1426 | en_US |
dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |