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Using recently developed Lanczos technique we study finite-temperature properties of the 2D Kondo lattice model at various fillings of the conduction band. At half filling the quasiparticle gap governs physical properties of the chemical…

Strongly Correlated Electrons · Physics 2009-10-31 K. Haule , J. Bonca , P. Prelovsek

We explore the electrical transport and magneto-conductance in quasi two-dimensional strongly correlated ultrathin films of LaNiO$_{3}$ (LNO) to investigate the effect of hetero-epitaxial strain on electron-electron and electron-lattice…

Strongly Correlated Electrons · Physics 2015-05-28 E. J. Moon , B. A. Gray , M. Kareev , J. Liu , S. G. Altendorf , F. Strigari , L. H. Tjeng , J. W. Freeland , J. Chakhalian

Complex ferromagnetic oxides such as La$_{0.67}$Sr$_{0.33}$MnO$_3$ (LSMO) offer pathways for creating energy efficient spintronic devices with new functionalities. LSMO exhibits high-temperature ferromagnetism, half metallicity, sharp…

The Mott insulator YVO$_{3}$ with $T_{N}$ = 118 K is revisited to explore the role of spin, lattice and orbital correlations across the multiple structural and magnetic transitions observed as a function of temperature. Upon cooling, the…

Strongly Correlated Electrons · Physics 2022-07-28 Yu Tao , Douglas L. Abernathy , Tianran Chen , Taner Yildirim , Jiaqiang Yan , Jianshi Zhou , John B. Goodenough , Despina Louca

We carried out temperature-dependent (20 - 550 K) measurements of resonant inelastic X-ray scattering on LaCoO$_3$ to investigate the evolution of its electronic structure across the spin-state crossover. In combination with charge-transfer…

We have studied the sub-picosecond quasiparticle dynamics in the perovskite manganite La0.7Ca0.3MnO3 and the layered manganite La1.4Sr1.6Mn2O7 using ultrafast optical spectroscopy. We found that for T > TC, initial relaxation proceeds on…

Strongly Correlated Electrons · Physics 2016-09-30 J. Lee , H. J. Lee , R. D. Averitt , S. A. Trugman , J. Demsar , D. J. Funk , N. H. Hur , Y. Moritomo , A. J. Taylor , R. P. Prasankumar , D. A. Yarotski

Scaling relations in the charge and spin excitations of (La,Sr)MnO3 are studied from both theoretical and experimental points of view. In the ferromagnetic metal phase, we investigate optical conductivity and neutron inelastic scattering,…

Strongly Correlated Electrons · Physics 2007-05-23 Nobuo Furukawa , Yutaka Moritomo , K. Hirota , Y. Endoh

We have used Raman scattering to investigate the magnetic excitations and lattice dynamics in the prototypical spin-orbit Mott insulators Sr2IrO4 and Sr3Ir2O7. Both compounds exhibit pronounced two-magnon Raman scattering features with…

Strongly Correlated Electrons · Physics 2016-04-06 H. Gretarsson , N. H. Sung , M. Hoeppner , B. J. Kim , B. Keimer , M. Le Tacon

Doped and undoped manganites are modeled by the coupling between itinerant $e_g$ electrons and static $t_{2g}$ spins, the Jahn-Teller and breathing phonon modes, and the Coulomb interaction. We provide for a careful estimate of all…

Strongly Correlated Electrons · Physics 2013-05-29 Y. -F. Yang , K. Held

We present a detailed magnetothermal study of Pr(0.7)Ca(0.3)MnO(3), a perovskite manganite in which an insulator-metal transition can be driven by magnetic field, but also by pressure, visible light, x-rays, or high currents. We find that…

Condensed Matter · Physics 2009-10-31 M. Roy , J. F. Mitchell , A. P. Ramirez , P. Schiffer

Lanthanum manganite, LaMnO (LMO) is the parent compound for a class of hole doped(e.g. La1-xCaxMnO3, La1-xSrxMnO3) and electron doped (e.g. . La1-xCexMnO3, La1-xSnxMnO3) perovskite complex oxide materials. Strong correlation between the…

Materials Science · Physics 2017-06-01 Arun Singh Chouhan

We combine time resolved pump-probe Magneto-Optical Kerr Effect and Photoelectron Spectroscopy experiments supported by theoretical analysis to determine the relaxation dynamics of delocalized electrons in half-metallic ferromagnetic…

In this paper, we report a novel photovoltaic phenomenon in a low cost manganite/ZnO p-n heterojunction grown on ITO glass substrate by pulsed laser depositon (PLD) under relative low growth temperature. The heterostructure…

Materials Science · Physics 2012-08-31 Jiaqi Zhang , Keke Huang , Xiaotian Yang , Wenzhe Si , Xiaofeng Wu , Yanyan Du , Gang Cheng , Shouhua Feng

The complex phase diagram of manganites with simultaneously active spin, charge, orbital, and lattice degrees of freedom continues providing surprises. In a recent groundbreaking experiment, membranes of the perovskite manganite…

Strongly Correlated Electrons · Physics 2020-07-22 Cengiz Şen , Elbio R. Dagotto

The room temperature (300 K) electronic structure of pulsed laser deposited LaNi_{x}V_{1-x}O_{3} thin films have been demonstrated. The substitution of early-transition metal (TM) V in LaVO_{3} thin films with late-TM Ni leads to the…

Strongly Correlated Electrons · Physics 2022-11-23 Anupam Jana , Sophia Sahoo , Sourav Chowdhury , Arup Kumar Mandal , R. J. Choudhary , D. M. Phase , A. K. Raychaudhuri

This article gives a comprehensive review on the recent studies of the double exchange systems using non-perturbative approaches; the dynamical mean-field theory and the Monte Carlo method. Investigations beyond mean-field type treatments…

Strongly Correlated Electrons · Physics 2007-05-23 N. Furukawa

Perovskite-type manganites, which are well-known for their intriguing physical properties such as colossal magnetoresistance (CMR) and half metalicity, have been considered as candidate materials for spintronics. However, their…

We study the low-temperature heat transport, as well as the magnetization and the specific heat, of TmMnO_3 single crystals to probe the transitions of magnetic structure induced by magnetic field. It is found that the low-T thermal…

Strongly Correlated Electrons · Physics 2012-11-19 X. M. Wang , Z. Y. Zhao , C. Fan , X. G. Liu , Q. J. Li , F. B. Zhang , L. M. Chen , X. Zhao , X. F. Sun

We use neutron scattering to study the lattice and magnetic structure of the layered half-doped manganite Pr$_{0.5}$Ca$_{1.5}$MnO$_4$. On cooling from high temperature, the system first becomes charge- and orbital- ordered (CO/OO) near…

Strongly Correlated Electrons · Physics 2009-11-13 Songxue Chi , F. Ye , Pengcheng Dai , J. A. Fernandez-Baca , Q. Huang , J. W. Lynn , E. W. Plummer , R. Mathieu , Y. Kaneko , Y. Tokura

We report resonant inelastic x-ray scattering experiments of the orbital ordered manganite LaMnO3. When the incident photon energy is tuned near the Mn K absorption edge, the spectra reveal three features at 2.5 eV, 8 eV and 11 eV. The 8 eV…

Strongly Correlated Electrons · Physics 2007-05-23 T. Inami , S. Ishihara , H. Kondo , J. Mizuki , T. Fukuda , S. Maekawa , H. Nakao , T. Matsumura , K. Hirota , Y. Murakami , Y. Endoh