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Related papers: Composition-driven Mott transition within SrTi$_{\…

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We study the doping driven Mott metal-insulator transition (MIT) in the periodic Anderson model set in the Mott-Hubbard regime. A striking asymmetry for electron or hole driven transitions is found. The electron doped MIT at larger U is…

Strongly Correlated Electrons · Physics 2011-04-06 G. Sordi , A. Amaricci , M. J. Rozenberg

We use density functional theory plus dynamical mean-field theory (DFT+DMFT) to study multiple control parameters for tuning the metal-insulator transition (MIT) in CaVO$_3$ thin films. We focus on separating the effects resulting from…

Strongly Correlated Electrons · Physics 2018-02-14 Sophie Beck , Gabriele Sclauzero , Uday Chopra , Claude Ederer

A powerful new impurity solver is shown to permit a systematic study of the doping driven Mott transition in a one-band Hubbard model within the framework of single-site dynamical mean field theory. At small dopings and large interaction…

Strongly Correlated Electrons · Physics 2013-05-29 Philipp Werner , Andrew J. Millis

The first-order metal-insulator transition (MIT) in paramagnetic $V_{2}O_{3}$ is studied within the ab-initio scheme LDA+DMFT, which merges the local density approximation (LDA) with dynamical mean field theory (DMFT). With a fixed value of…

Strongly Correlated Electrons · Physics 2009-11-07 M. S. Laad , L. Craco , E. Müller-Hartmann

Upon reduction of the film thickness we observe a metal-insulator transition in epitaxially stabilized, spin-orbit coupled SrIrO$_3$ ultrathin films. By comparison of the experimental electronic dispersions with density functional theory at…

Strongly Correlated Electrons · Physics 2017-12-27 P. Schütz , D. Di Sante , L. Dudy , J. Gabel , M. Stübinger , M. Kamp , Y. Huang , M. Capone , M. -A. Husanu , V. Strocov , G. Sangiovanni , M. Sing , R. Claessen

Heterointerfaces in complex oxide systems open new arenas in which to test models of strongly correlated material, explore the role of dimensionality in metal-insulator-transitions (MITs) and small polaron formation. Close to the quantum…

Strongly Correlated Electrons · Physics 2014-04-10 Daniel G. Ouellette , Pouya Moetakef , Tyler A. Cain , Jack Y. Zhang , Susanne Stemmer , David Emin , S. James Allen

The 5$d$ series semimetallic Dirac nodal-line perovskite SrIrO$_3$ presents a promising system to study the interplay between spin-orbit coupling and electron-electron interactions in the epitaxial thin film geometry. The competition…

Materials Science · Physics 2024-06-05 Wesley Surta , Saeed Almalki , Ya-Xun Lin , Tim Veal , Marita O'Sullivan

A correlated material in the vicinity of an insulator-metal transition (IMT) exhibits rich phenomenology and variety of interesting phases. A common avenue to induce IMTs in Mott insulators is doping, which inevitably leads to disorder.…

We study the electronic structure, magnetic state, and phase stability of paramagnetic BiNiO$_3$ near a pressure-induced Mott insulator-to-metal transition (MIT) by employing a combination of density functional and dynamical mean-field…

Strongly Correlated Electrons · Physics 2019-11-06 I. Leonov , A. S. Belozerov , S. L. Skornyakov

Metal-insulator transitions (MITs) in correlated oxides offer immense potential for next-generation Mottronic devices. However, their integration into practical applications is often hindered by the coupling of MITs with symmetry-lowering…

We studied Sr2IrO4 and Sr3Ir2O7 using angle-resolved photoemission spectroscopy (ARPES), making direct experimental determinations of intra- and inter-cell coupling parameters as well as Mott correlations and gap sizes. The results are…

Strongly Correlated Electrons · Physics 2015-06-11 Q. Wang , Y. Cao , J. A. Waugh , S. R. Park , T. F. Qi , O. B. Korneta , G. Cao , D. S. Dessau

This study examines the application of transition metal-doped SrTiO3 in photovoltaic technologies, such as photocatalysis. The core objective is to evaluate how different dopants influence the structural and electronic characteristics of…

Materials Science · Physics 2024-10-15 Zdeněk Jansa , Lucie Prušáková , Štěpánka Jansová , Pavel Calta , Pavol Šutta , Ján Minár

We investigate the influence of an unoccupied band on the transport properties of a strongly correlated electron system. For that purpose, additional orbitals are coupled to a Hubbard model via hybridization. The filling is one electron per…

Condensed Matter · Physics 2009-10-28 Stefan Blawid , Hoangh Anh Tuan , Takashi Yanagisawa , Peter Fulde

We present a detailed account of the physics of Vanadium sesquioxide (${\rm V_2O_3}$), a benchmark system for studying correlation induced metal-insulator transition(s). Based on a detailed perusal of a wide range of experimental data, we…

Strongly Correlated Electrons · Physics 2009-11-11 M. S. Laad , L. Craco , E. Müller-Hartmann

Magnetic fluctuations in transition metal oxides are a subject of intensive research because of the key role they are expected to play in the transition from the Mott insulator to the unconventional metallic phase of these materials, and…

Strongly Correlated Electrons · Physics 2016-01-06 J. Gunasekera , L. Harriger , A. Dahal , T. Heitmann , G. Vignale , D. K. Singh

The lattice response of a prototype Mott insulator, SmTiO3, to hole doping is investigated with atomic-scale spatial resolution. SmTiO3 films are doped with Sr on the Sm site with concentrations that span the insulating and metallic sides…

Materials Science · Physics 2017-11-22 Honggyu Kim , Patrick B. Marshall , Kaveh Ahadi , Thomas E. Mates , Evgeny Mikheev , Susanne Stemmer

Many metallic transition-metal oxides turn insulating when grown as films that are only a few unit-cells thick. The microscopic origins of these thickness induced metal-to-insulator transitions however remain under dispute. Here, we…

Strongly Correlated Electrons · Physics 2022-01-19 Matthias Pickem , Josef Kaufmann , Karsten Held , Jan M. Tomczak

Oxygen vacancies are often attributed to changes in the electronic transport for perovskite oxide materials (ABO$_3$). Here, we use density functional theory (DFT) coupled with non-equilibrium Green's functions (NEGF) to systematically…

Materials Science · Physics 2024-05-24 Victor Rosendal , Nini Pryds , Dirch Hjorth Petersen , Mads Brandbyge

Motivated by recent Fermi surface and transport measurements on LaNiO3, we study the Mott Metal-Insulator transitions of perovskite nickelates, with the chemical formula RNiO3, where R is a rare-earth ion. We introduce and study a minimal…

Strongly Correlated Electrons · Physics 2015-05-28 SungBin Lee , Ru Chen , Leon Balents

Vanadium sesquioxide (V2O3) is an archetypal Mott insulator in which the atomic positions and electron correlations change as temperature, pressure or doping are varied giving rise to different structural, magnetic or electronic phase…

Strongly Correlated Electrons · Physics 2024-06-12 P. Homm , M. Menghini , J. W. Seo , S. Peters , J. -P. Locquet