Tesis sobre el tema "Electronic Properties - Exotic Transition Metal Oxides"
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Mete, Ersen. "Electronic Properties Of Transition Metal Oxides". Phd thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1069699/index.pdf.
Texto completoMillburn, Julie Elizabeth. "Structural and electronic properties of transition metal oxides". Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364166.
Texto completoMulley, James Stephen. "Electronic, spectroscopic and interface properties of two transition metal oxides". Thesis, University of Reading, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.533743.
Texto completoBranford, William Richard. "Relationship of structural and electronic properties in transition metal oxides". Thesis, University College London (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407974.
Texto completoJewell, Catherine Mary. "Structural & electronic properties of some early transition metal oxides". Thesis, University College London (University of London), 2004. http://discovery.ucl.ac.uk/1446632/.
Texto completoBruneel, Pierre. "Electronic and spintronic properties of the interfaces between transition metal oxides". Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASP047.
Texto completoThe anomalous transport properties of transition metal oxides, in particular the surface of SrTiO₃ or at the interface between SrTiO₃ and LaAlO₃ is investigated in this thesis. These systems host two-dimensional electron gases. Nonlinear Hall Effect measurements suggest that several species of carriers are present in these systems, and that their population is varying on a nontrivial manner upon electrostatic doping. The role of the electrostatics properties of the electron gas and of the electronic correlations are discussed in this light. Next we discuss the spin to charge conversion of these systems thanks to tight-binding modeling and linear response theory. The complex interplay between atomic spin-orbit coupling and the inversion symmetry breaking at the interface leads to a complex spin-orbital-momentum locking of the electrons, inducing spin textures. These spin textures are responsible for the appearance of the Edelstein and Spin Hall Effect in these heterostructures and are characteristic of the multi-orbital character of these electronic systems. Finally an ab initio study of STO/LAO/STO heterostructures is performed to explain experimental evidence of new ways to produce an electron gas at this interface. The respective roles of the chemistry, electrostatics and defects are discussed
Baskar, Dinesh. "High temperature magnetic properties of transition metal oxides with perovskite structure /". Thesis, Connect to this title online; UW restricted, 2008. http://hdl.handle.net/1773/9812.
Texto completoZhang, Yan. "Theoretical study of the transition-metal oxides Pb2FeMoO6 and ZrO2". Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112209.
Texto completoTransition-metal oxides have attracted exceptional research interest in recent years from both fundamental and technological perspectives. In this respect, we focus on two types of oxides, first, the double perovskite, Pb2FeMoO6 for a potential magnetoresistive and spintronics device application, second, zirconia ZrO2 with great mechanical and dielectric properties can be widely used in both structural and functional material fields. In this thesis we use first-principles calculations (ab-initio) to study systematically the detailed orbital-decomposed electronic structures and magnetic properties of Pb2FeMoO6 in the perfected bulk, defected bulk and slab structures. The detailed orbital-decomposed electronic structures, the mechanical, dynamical and dielectric properties of the ZrO2 in six phases (cubic, tetragonal, monoclinic, orthoI (Pbca), orthoII (Pnma) and (Pca21)) have also been studied.Firstly, considering the comparable ionic radius of Pb2+ (1.49Å) with that of Sr2+ (1.44Å), we propose for the first time to substitute Sr2+ ion with Pb2+ ion in Sr2FeMoO6 and a detailed study has been performed on the Pb2FeMoO6 in the perfected bulk, defected bulk and slab structures. The half-metallic nature and a complete (100%) spin-polarized transport properties reflect the bulk and especially slab Pb2FeMoO6 a potential application in magnetoresistive and spintronics devices; The detailed orbital-decomposed density of states show the octahedral crystal-field of the six oxygen atoms around transition-metal Fe or Mo atoms splits the five-fold degenerate states of the free Fe or Mo atoms into triply degenerate t2g (dxy, dyz and dzx) states with lower energy and doubly degenerate eg (dz2 and dx2-y2) states with higher energy, which cannot be observed in previous partial density of states ( ); The Fe3+ and Mo5+ ions are in the (3d5, s=5/2) and (4d1, s=1/2) states with positive and negative magnetic moments respectively and thus antiferromagnetic coupling via oxygen between them; The half-metallic character is maintained for the disordered Pb2FeMoO6 compounds containing FeMo antisite, VFe, VO, or VPb vacancy, while it vanishes when MoFe antisite, Fe-Mo interchange or VMo vacancy are presented even the defect concentration reduce down to C=6.25%. So the MoFe antisite, Fe-Mo interchange or VMo vacancy defects have to be avoided in order to preserve the half-metallic character of the Pb2FeMoO6 compounds and thus usable in magnetoresistive and spintronics devices.Secondly, based on the calculated individual elastic stiffness constants Cij of six ZrO2 phases, the elastic and mechanical properties of the polycrystalline aggregates have been predicted. We further exam the insulating characters of the cubic/tetragonal ZrO2 slabs with various possible terminations and thicknesses within three [(001), (110) and (111)]/five [(001), (100), (110), (101) and (111)] lower index Miller planes. It is found for the first time that among various possible terminations and thicknesses within these three/five lower index Miller planes, only ZrO2-terminated slabs of the (110)/(100) Miller plane and O-terminated slabs of the (111)/(101) Miller plane of cubic/tetragonal ZrO2 maintain the insulating character and thus usable as a gate dielectric oxide in IC industry even the slab thicknesses reduce down to 2 and 3 atomic layers, respectively; Since cubic and tetragonal ZrO2 have larger elastic anisotropy, both stress and strain energy density have been calculated for all {hkl}-oriented grains of a cubic ZrO2 polycrystalline film as one example
Lin, Xiunu. "A SYSTEMATIC STUDY ON THE THERMODYNAMIC AND TRANSPORT PROPERTIES OF LAYERED RUTHENATES". UKnowledge, 2006. http://uknowledge.uky.edu/gradschool_diss/506.
Texto completoTriana, Carlos A. "Atomic short-range order, optical and electronic properties of amorphous transition metal oxides : An experimental and theoretical study of amorphous titanium aTiO2 and tungsten aWO3 solid thin-film oxides". Doctoral thesis, Uppsala universitet, Fasta tillståndets fysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-318193.
Texto completoSpence, Stephanie L. "Tuning the Morphology and Electronic Properties of Single-Crystal LiNi0.5Mn1.5O4-δ". Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/100790.
Texto completoM.S.
The development of lithium-ion batteries has been fundamental to the expansion and prevalence of consumer electronics and electric vehicles in the twenty-first century. Despite their ubiquity, there is an ongoing drive by researchers to address the limitations and improve the quality and performance of lithium ion batteries. Much research has focused on altering the composition, structure, or properties of electrodes at the materials level to design higher achieving batteries. A fundamental understanding of how composition and structure effect battery performance is necessary to progress toward better materials. This thesis focuses on investigating the properties of LiNi0.5Mn1.5O4-δ (LNMO). LNMO material is considered a promising cathode material to meet the increasing consumer demands for improved battery performance. Through the synthesis methods, the shape of individual particles and the global electronic properties of LNMO can be tuned. In this work, specific synthesis parameters are systematically tuned and the properties of the resultant LNMO materials are explored. Electrochemical testing also evaluates the performance of the materials and offers insights into how they may fair in real battery systems. In an effort to potentially recycle spent battery materials, LNMO is also utilized as a catalyst support. Alteration of shape and electronic properties of the LNMO support can influence the catalytic properties, or the ability of the material to enhance the rate of a chemical reaction. Overall, this thesis explores how LNMO can be tuned and utilized for different applications. This work provides insights for understanding LNMO properties and direction for the development of future battery materials.
Jianxiao, Xu. "Thermoelectric properties of transition metal oxides and thallium main group chalcogenides". Thesis, 2008. http://hdl.handle.net/10012/3848.
Texto completoLee, Wei-Cheng. "Electronic properties of strongly correlated layered oxides". 2008. http://hdl.handle.net/2152/17930.
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Topwal, Dinesh. "Investigation Of Electronic And Magnetic Structure Of Transition Metal Oxides With Emphasis On Magnetoresistive Systems". Thesis, 2007. https://etd.iisc.ac.in/handle/2005/615.
Texto completoTopwal, Dinesh. "Investigation Of Electronic And Magnetic Structure Of Transition Metal Oxides With Emphasis On Magnetoresistive Systems". Thesis, 2007. http://hdl.handle.net/2005/615.
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