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We perform a theoretical study of the leading pairing instabilities and the associated superconducting gap functions within the spin-fluctuation mediated pairing scenario in the presence of spin-orbit coupling (SOC). Focussing on iron-based…

Superconductivity · Physics 2019-09-04 Daniel D. Scherer , Brian M. Andersen

Spin-orbit interaction affects the band structure of topological insulators beyond the opening of an inverted gap in the bulk bands, and the understanding of its effects on the surface states is of primary importance to access the…

Mesoscale and Nanoscale Physics · Physics 2024-03-05 Denny Puntel , Simone Peli , Wibke Bronsch , Federico Cilento , Hubert Ebert , Jürgen Braun , Fulvio Parmigiani

With octahedrally coordinated $t_{\rm 2g}$ orbitals which are active at filling $n=2$, the $\rm Sr_2CrO_4$ compound exhibits rich interplay of spin-orbital physics with tetragonal distortion induced crystal field tuning by external agent…

Strongly Correlated Electrons · Physics 2022-10-20 Shubhajyoti Mohapatra , Dheeraj Kumar Singh , Avinash Singh

Electron correlation strength is predicted to be weak in 5d transition metal oxides and hence, various anomalous electronic properties observed in these systems are often attributed to the large spin-orbit interaction strength. Employing…

Strongly Correlated Electrons · Physics 2009-07-17 Kalobaran Maiti

Na2IrO3 (NIO) is known to be a spin-orbit (SO) driven j=1/2 pseudo-spin Mott-Hubbard (M-H) insulator. However, the microscopic origin of the pseudo-spin state and the role of local structural distortions have not been clearly understood.…

In $4d/5d$ transition-metal systems, many interesting physical properties arise from the interplay of bandwidth, electronic correlations, and spin-orbit interactions. Here, using {\it ab initio} density functional theory, we systematically…

Strongly Correlated Electrons · Physics 2022-10-28 Yang Zhang , Ling-Fang Lin , Adriana Moreo , Elbio Dagotto

The double perovskite Ba$_{2}$NaOsO$_{6}$ (BNOO), an exotic example of a very high oxidation state (heptavalent) osmium $d^1$ compound and also uncommon by being a ferromagnetic Mott insulator without Jahn-Teller (JT) distortion, is modeled…

Strongly Correlated Electrons · Physics 2015-06-23 Shruba Gangopadhyay , Warren E. Pickett

The electronic and magnetic properties of the cubic double perovskite Ba2NaOsO6 were examined by performing first-principles density functional theory calculations and analyzing spin-orbit coupled states of an Os7+ (d1) ion at an octahedral…

Materials Science · Physics 2007-05-23 H. J. Xiang , M. -H. Whangbo

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

Manipulating spin-orbit coupling (SOC) is important for devices such as spin-orbit torque based memory and its understanding is neccessary to answer several fundamental open questions in triplet state superconductivity, topological…

Mesoscale and Nanoscale Physics · Physics 2017-09-13 Kalon Gopinadhan , A. Annadi , Younghyun Kim , Amar Srivastava , Brijesh Kumar , Jingsheng Chen , J. M. D. Coey , Ariando , T. Venkatesan

It has recently been proposed that Na4Ir3O8 is a weak Mott insulator at ambient pressure, supporting a three-dimensional spin liquid phase with a spinon Fermi surface. This proposal is consistent with recent experimental findings that the…

Strongly Correlated Electrons · Physics 2013-05-29 Daniel Podolsky , Yong Baek Kim

We investigate the effects of the spin-orbit coupling (SOC) in a three-orbital impurity model with Kanamori interaction using the numerical renormalization group method. We focus on the impurity occupancy $N_d=2$ relevant to the dynamical…

Strongly Correlated Electrons · Physics 2017-08-22 Alen Horvat , Rok Zitko , Jernej Mravlje

We present the first-principles investigation of the structural, electronic, and magnetic properties of SrCoO$_{3-\delta}$ ($\delta=0, 0.25, 0.5$) to understand the multivalent nature of Co ions in SrCoO$_{3-\delta}$ along the line of…

Strongly Correlated Electrons · Physics 2018-08-15 Jinyoung Lim , Jaejun Yu

The effect of isoelectronic substitution within single crystals of (Sr1-xCax)2-yIrO4+z is explored. The nominal n=1 Ruddlesden-Popper phase with y=0, z=0 remains stable from x=0 until x=0.11, where the antiferromagnet spin-orbit Mott…

Materials Science · Physics 2016-11-23 Xiang Chen , Stephen D. Wilson

In the light of recent interesting experimental work on MgV$_2$O$_4$ we employ the density functional theory to investigate the crucial role played by different interaction parameters in deciding its electronic and magnetic properties. The…

Strongly Correlated Electrons · Physics 2011-09-15 Sudhir K. Pandey

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 performed x-ray absorption spectroscopy (XAS) measurements on a series of Ir-based 5d transition metal compounds, including Ir, IrCl3, IrO2, Na2IrO3, Sr2IrO4, and Y2Ir2O7. By comparing the intensity of the "white-line" features…

Strongly Correlated Electrons · Physics 2016-08-05 J. P. Clancy , N. Chen , C. Y. Kim , W. F. Chen , K. W. Plumb , B. C. Jeon , T. W. Noh , Young-June Kim

We report on the influence of spin-orbit coupling (SOC) in the Fe-based superconductors (FeSCs) via application of circularly-polarized spin and angle-resolved photoemission spectroscopy. We combine this technique in representative members…

The role of spin-orbit coupling and Hund's rule coupling on magnetic ordering, anisotropy, and excitations are investigated within a minimal three-orbital model for the $5d^3$ compound $\rm Na Os O_3$. Asymmetry between the magnetic moments…

Strongly Correlated Electrons · Physics 2019-03-12 Avinash Singh , Shubhajyoti Mohapatra , Churna Bhandari , Sashi Satpathy

The complex iridium oxide Na3Ir3O8 with a B-site ordered spinel structure was synthesized in single crystalline form, where the chiral hyper-kagome lattice of Ir atoms, as observed in the spin-liquid candidate Na4Ir3O8, was identified. The…

Strongly Correlated Electrons · Physics 2013-11-15 T. Takayama , A. Matsumoto , J. Nuss , A. Yaresko , K. Ishii , M. Yoshida , J. Mizuki , H. Takagi
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