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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

Using density functional calculations, we demonstrate that the spin-orbit coupling (SOC) of the Ir4+ ion plays an essential role in determining the antiferromagnetism of the hexagonal spin-chain system Sr3MIrO6 (M = Ni, Co) by tuning the…

Strongly Correlated Electrons · Physics 2014-04-10 Xuedong Ou , Hua Wu

Spin-orbit coupling (SOC) often gives rise to interesting electronic and magnetic phases in an otherwise ordinary pool of paramagnetic heavy metal oxides. In presence of strong SOC, assumed to be working in $j$-$j$ coupling regime, 5$d^4$…

The unusual magnetic and electronic ground states of 5d iridates has been shown to be driven by intrinsically enhanced spin-orbit coupling (SOC). The influence of appreciable but reduced SOC in creating the manifested magnetic insulating…

Strongly Correlated Electrons · Physics 2015-12-01 S. Calder , L. Li , S. Okamoto , Y. Choi , R. Mukherjee , D. Haskel , D. Mandrus

Spin-orbit coupling (SOC) is a fundamental interaction in solids which can induce a broad spectrum of unusual physical properties from topologically non-trivial insulating states to unconventional pairing in superconductors. In iron-based…

Orthorhombic SrIrO3 subjected to strain show tunable transport properties. With underlying symmetry remaining invariant, these properties are associated with IrO6 octahedral tilting. Adopting to first-principles methods, the effects of…

Materials Science · Physics 2015-09-02 Vijeta Singh , J. J. Pulikkotil

In the context of correlated insulators, where electron-electron interactions (U) drive the localization of charge carriers, the metal-insulator transition (MIT) is described as either bandwidth (BC) or filling (FC) controlled. Motivated by…

The semi-metallic behavior of the perovskite iridate SrIrO3 shifts the end-member of the strongly spin-orbit (SO) coupled Ruddlesden-Popper series Srn+1IrnO3n+1 away from the Mott insulating regime and the half-filled pseudospin Jeff=1/2…

Strongly Correlated Electrons · Physics 2025-02-06 Dirk Fuchs , Arun Kumar Jaiswal , Fabrice Wilhelm , Di Wang , Andre Rogalev , Matthieu Le Tacon

We study possible superconductivity in a carrier-doped iridium oxide insulator Sr$_{2}$IrO$_{4}$ based on an effective $t_{2g}$ three-orbital Hubbard model on the square lattice with a large spin-orbit coupling (SOC). Numerically solving…

Superconductivity · Physics 2019-09-02 Kazutaka Nishiguchi , Tomonori Shirakawa , Hiroshi Watanabe , Ryotaro Arita , Seiji Yunoki

Spin-orbit coupling (SOC) offers a large variety of novel and extraordinary magnetic and electronic properties in otherwise `ordinary pool' of heavy ion oxides. Here we present a detailed study on an apparently isolated hexagonal 2$H$…

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

Spin-orbit coupling (SOC) is a key interaction in spintronics, allowing an electrical control of spin or magnetization and, vice versa, a magnetic control of electrical current. However, recent advances have revealed much broader…

Investigation of elementary excitations has advanced our understanding of many-body physics governing most physical properties of matter. Recently spin-orbit excitons have drawn much attention, whose condensates near phase transitions…

Strongly Correlated Electrons · Physics 2019-07-24 A. Nag , S. Bhowal , M. Moretti Sala , A. Efimenko , I. Dasgupta , S. Ray

The electronic structure of Sr$_3$CuIrO$_6$, a model system for the 5d Ir ion in an octahedral environment, is studied through a combination of resonant inelastic x-ray scattering (RIXS) and theoretical calculations. RIXS spectra at the Ir…

Iridates abound with interesting magnetic behaviours because of their strong spin-orbit coupling. Sr$_3$NiIrO$_6$ brings together the spin-orbital entanglement of the Ir$^{4+}$ ion with a 3$d$ Ni cation and a one-dimensional crystal…

Materials Science · Physics 2018-10-19 Turan Birol , Kristjan Haule , David Vanderbilt

A burning question in the emerging field of spin-orbit driven insulating iridates, such as Na2IrO3 and Li2IrO3 is whether the observed insulating state should be classified as a Mott-Hubbard insulator derived from a half-filled relativistic…

Strongly Correlated Electrons · Physics 2014-01-31 I. I. Mazin , S. Manni , K. Foyevtsova , Harald O. Jeschke , P. Gegenwart , Roser Valenti

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

The competition between kinematic, relativistic and Coulombic interactions in iridium-based oxides has spurred intense experimental and theoretical investigations regarding the electronic structure and magnetism. We argue here that the…

Strongly Correlated Electrons · Physics 2025-02-25 Kuldeep Kargeti , Bidyut Mallick , Vladislav Borisov , Sk. Soyeb Ali , Johan Hellsvik , Olle Eriksson , S. K. Panda

The combination of strong spin-orbit coupling and Coulomb interactions makes the $5d$ iridates a unique platform for realizing novel correlated electronic states. Here, utilizing infrared spectroscopy, we demonstrate that a robust Mott…

Strongly Correlated Electrons · Physics 2026-03-06 Kai Wang , Jun Yang , Chaoyang Kang , Weikang Wu , Wenka Zhu , Jianzhou Zhao , Yaomin Dai , Bing Xu

Novel interplay of spin-orbit coupling and electron correlations in complex Ir oxides recently emerged as a new paradigm for correlated electron physics. Because of a large spin-orbit coupling of ~0.5 eV, which is comparable to the transfer…

Strongly Correlated Electrons · Physics 2015-06-22 Jobu Matsuno , Kota Ihara , Shugen Yamamura , Hiroki Wadati , Kenji Ishii , V. Vijay Shankar , Hae-Young Kee , Hidenori Takagi
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