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I study the electronic structure and magnetism of postperovskite CaIrO$_3$ using first-principles calculations. The density functional calculations within the local density approximation without the combined effect of spin-orbit coupling…

Strongly Correlated Electrons · Physics 2012-01-30 Alaska Subedi

We present electronic structure calculations for the one-dimensional magnetic chain compounds Ca_3CoRhO_6 and Ca_3FeRhO_6. The calculations are based on density functional theory and the local density approximation. We use the augmented…

Strongly Correlated Electrons · Physics 2008-01-26 V. Eyert , U. Schwingenschloegl , C. Hackenberger , T. Kopp , R. Fresard , U. Eckern

We investigate the electronic structure of Sr$_3$NiRhO$_6$, a quasi-one-dimensional spin chain system using \emph{ab initio} band structure calculations. Spin polarized calculations within GGA reveal that Ni and Rh have finite moments and…

Strongly Correlated Electrons · Physics 2009-11-13 S. K. Pandey , Kalobaran Maiti

We have studied the electronic structure of BaCoO$_3$ using soft x-ray absorption spectroscopy at the Co-$L_{2,3}$ and O-$K$ edges, magnetic circular dichroism at the Co-$L_{2,3}$ edges, as well as valence band hard x-ray photoelectron…

Using x-ray absorption spectroscopy at the Rh-L_2,3, Co-L_2,3, and Fe-L_2,3 edges, we find a valence state of Co^2+/Rh^4+ in Ca3CoRhO6 and of Fe^3+/Rh^3+ in Ca3FeRhO6. X-ray magnetic circular dichroism spectroscopy at the Co-L_2,3 edge of…

Strongly Correlated Electrons · Physics 2008-05-15 T. Burnus , Z. Hu , Hua Wu , J. C. Cezar , S. Niitaka , H. Takagi , C. F. Chang , N. B. Brookes , H. -J. Lin , L. Y. Jang , A. Tanaka , K. S. Liang , C. T. Chen , L. H. Tjeng

The spin-orbit coupling (SOC) interactions, electron correlation effects and Hund coupling cooperate and compete with each other, leading to novel properties, quantum phase and non-trivial topological electronic behavior in iridium oxides.…

Strongly Correlated Electrons · Physics 2018-12-19 Xing Ming , Xiangang Wan , Carmine Autieri , Jianfeng Wen , Xiaojun Zheng

Here we present a detailed investigation of the Co and Ir local electronic structures in La1.5A0.5CoIrO6 (A = Ba, Ca) compounds in order to unravel the orbital hybridization mechanism in these CoIr-based double perovskites. Our results of…

We have investigated electronic structures of antiferromagnetic YBaCo_2O_5 using the local spin-density approximation (LSDA) + U method. The charge and orbital ordered insulating ground state is correctly obtained with the strong on-site…

Strongly Correlated Electrons · Physics 2009-10-31 S. K. Kwon , B. I. Min

The electronic ground state of Ca3LiOsO6 was recently considered within an intermediate coupling regime that revealed J=3/2 spin-orbit entangled magnetic moments. Through inelastic neutron scattering and density functional theory we…

Strongly Correlated Electrons · Physics 2017-11-29 S. Calder , D. J. Singh , V. O. Garlea , M. D. Lumsden , Y. G. Shi , K. Yamaura , A. D. Christianson

We employ first-principles density-functional theory, to perform a comparative investigation of the effect of the spin-orbit coupling (SOC) on the electronic and magnetic properties of three experimentally synthesized and characterized…

Strongly Correlated Electrons · Physics 2024-03-28 Roumita Roy , Sudipta Kanungo

We present an anti-ferromagnetically ordered ground state of Na$_{2}$IrO$_{3}$ based on density-functional-theory calculations including both spin-orbit coupling and on-site Coulomb interaction $U$. We show that the splitting of $e_{g}'$…

Strongly Correlated Electrons · Physics 2009-07-07 Hosub Jin , Heungsik Kim , Hogyun Jeong , Choong H. Kim , Jaejun Yu

The electronic structure and magnetic properties of CaCr$\mathrm{O}_3$ have been calculated by two methods, including hybrid-exchange density-function theory and density-functional theory + $U$. The computed densities of states from both of…

Strongly Correlated Electrons · Physics 2015-05-13 Wei Wu

We have studied in detail the electronic structure of IrO$_2$ including spin-orbit coupling (SOC) and electron-electron interaction, both within the GGA+U and GGA+DMFT approximations. Our calculations reveal that the Ir t$_{2g}$ states at…

Strongly Correlated Electrons · Physics 2014-04-25 S. K. Panda , S. Bhowal , A. Delin , O. Eriksson , I. Dasgupta

We performed resonant x-ray diffraction experiments at the $L$ absorption edges for the post-perovskite-type compound CaIrO$_{3}$ with $(t_{2g})^5$ electronic configuration. By observing the magnetic signals, we could clearly see that the…

We investigate the electronic structure of BaIrO3, an interesting compound exhibiting charge density wave transition in its insulating phase and ferromagnetic transition at the same temperature, using full potential linearized augmented…

Strongly Correlated Electrons · Physics 2009-11-11 Kalobaran Maiti

The temperature dependent ac and dc magnetization and heat capacity data of Ca$_3$CoIrO$_6$, a spin-chain compound crystallizing in a K$_4$CdCl$_6$-derived rhombohedral structure, show the features due to magnetic ordering of a…

Strongly Correlated Electrons · Physics 2009-11-10 S. Rayaprol , Kausik Sengupta , E. V. Sampathkumaran

We propose a new mechanism for the paramagnetic metal-insulator transition in the layered perovskite Ca$_{2-x}$Sr$_{x}$RuO$_{4}$ (0<x<0.2). The LDA+U approach including spin-orbit coupling is used to calculate the electronic structures. In…

Strongly Correlated Electrons · Physics 2015-05-28 Guo-Qiang Liu

A comprehensive investigation of the electronic and magnetic properties of NaOsO3 has been made using the first principle calculations, in order to understand the importance of Coulomb interaction, spin-orbit coupling and magnetic order in…

Strongly Correlated Electrons · Physics 2012-05-17 Yongping Du , Xiangang Wan , Li Sheng , Jinming Dong , Sergey Y. Savrasov

Here we have performed detailed first principles calculations for the electronic structure and magnetic properties of Ba$_6$Cr$_2$S$_{10}$ to study the origin of the anti-ferromagnetic exchange interaction between spins on Cr ions for the…

Strongly Correlated Electrons · Physics 2023-08-16 Jianhua Zhu , Jianfeng Zhang , Yilin Zhang , Devashibhai Adroja , Huancheng Yang , Xiancheng Wang , Changqing Jin , Ji Chen , Wei Wu

We investigate the antiferromagnetic insulating state of the recently discovered double perovskites Sr$_2$XOsO$_6$ (X$=$Sc, Mg) by using ab-initio calculations (based on Density Functional Theory and Dynamical Mean-Field Theory) to…

Strongly Correlated Electrons · Physics 2016-11-22 Gianluca Giovannetti
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