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Sr2IrO4 is a magnetic insulator assisted by strong spin-orbit coupling (SOC) whereas the Sr2RuO4 is a p-wave superconductor. The contrasting ground states have been shown to result from the critical role of the strong SOC in the iridate.…

Strongly Correlated Electrons · Physics 2016-04-26 S. J. Yuan , S. Aswartham , J. Terzic , H. Zheng , H. D. Zhao , P. Schlottmann , G. Cao

The effect of spin-orbit coupling on the electronic structure of the layered iron-free pnictide superconductor, SrPtAs, has been studied using the full potential linearized augmented plane wave method. The anisotropy in Fermi velocity,…

Superconductivity · Physics 2012-02-09 S. J. Youn , S. H. Rhim , D. F. Agterberg , M. Weinert , A. J. Freeman

We investigated the electronic structures of the 5$d$ Ruddlesden-Popper series Sr$_{n+1}$Ir$_{n}$O$_{3n+1}$ ($n$=1, 2, and $\infty$) using optical spectroscopy and first-principles calculations. As 5$d$ orbitals are spatially more extended…

Strongly Correlated Electrons · Physics 2009-11-13 S. J. Moon , H. Jin , K. W. Kim , W. S. Choi , Y. S. Lee , J. Yu , G. Cao , A. Sumi , H. Funakubo , C. Bernhard , T. W. Noh

Resonant x-ray diffraction experiments were performed for the metallic iridium oxide IrO$_{2}$. We observed anisotropic tensor of susceptibility (ATS) scattering, the spectrum of which shows a sharp contrast between the $L_{3}$ and $L_{2}$…

Strongly Correlated Electrons · Physics 2015-06-12 Yasuyuki Hirata , Kenya Ohgushi , Jun-ichi Yamaura , Hiroyuki Ohsumi , Soshi Takeshita , Masaki Takata , Takahisa Arima

Large charge-to-spin conversion (spin Hall angle) and spin Hall conductivity are prerequisites for development of next generation power efficient spintronic devices. In this context, heavy metals (e.g. Pt, W etc.), topological insulators,…

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

Effective spin mixing conductance (ESMC) across the nonmagnetic metal (NM)/ferromagnet interface, spin Hall conductivity (SHC) and spin diffusion length (SDL) in the NM layer govern the functionality and performance of pure spin current…

Materials Science · Physics 2016-09-02 L. Ma , H. A. Zhou , L. Wang , X. L. Fan , W. J. Fan , D. S. Xue , K. Xia , G. Y. Guo , S. M. Zhou

There has been a rapidly growing interest on the interplay between spin-orbit coupling (SOC) and Hubbard interaction U in correlated materials. A current consensus is that the stronger the SOC, the smaller is the critical interaction Uc…

Strongly Correlated Electrons · Physics 2013-05-30 M. Ahsan Zeb , Hae-Young Kee

Spin-orbit coupling (SOC) plays a crucial role in magnetic and electronic properties of 5$d$ iridates. In this paper we have experimentally investigated the structural and physical properties of a series of Ir-based double perovskite…

Strongly Correlated Electrons · Physics 2019-10-02 Abhisek Bandyopadhyay , I. Carlomagno , L. Simonelli , M. Moretti Sala , A. Efimenko , C. Meneghini , Sugata Ray

Spin-orbit entangled pseudospins hold promise for a wide array of exotic magnetism ranging from a Heisenberg antiferromagnet to a Kitaev spin liquid depending on the lattice and bonding geometry, but many of the host materials suffer from…

Strongly Correlated Electrons · Physics 2022-03-30 Hoon Kim , Joel Bertinshaw , J. Porras , B. Keimer , Jungho Kim , J. -W. Kim , Jimin Kim , Jonghwan Kim , Gahee Noh , Gi-Yeop Kim , Si-Young Choi , B. J. Kim

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

An unconventional superconductor is distinguished with two types of gap functions: unitary and non-unitary. This core subject has been concentrated on purely spin-triplet or singlet-triplet mixed superconductors. However, the generalization…

Superconductivity · Physics 2023-03-29 Meng Zeng , Dong-Hui Xu , Zi-Ming Wang , Lun-Hui Hu

Epitaxial strain in transition-metal oxides can induce dramatic changes in electronic and magnetic properties. A recent study on the epitaxially strained SrCoO$_3$ thin films revealed persistent ferromagnetism even across a metal-insulator…

Using soft-x-ray absorption spectroscopy at the Co-$L_{2,3}$ and O-$K$ edges, we demonstrate that the Co$^{3+}$ ions with the CoO$_{5}$ pyramidal coordination in the layered Sr$_2$CoO$_3$Cl compound are unambiguously in the high spin state.…

Strongly Correlated Electrons · Physics 2007-05-23 Z. Hu , Hua Wu , M. W. Haverkort , H. H. Hsieh , H. -J. Lin , T. Lorenz , J. Baier , A. Reichl , I. Bonn , C. Felser , A. Tanaka , C. T. Chen , L. H. Tjeng

The electronic structures and thermoelectric properties of semiconducting transition-metal dichalcogenide monolayers $\mathrm{MX_2}$ (M=Zr, Hf, Mo, W and Pt; X=S, Se and Te) are investigated by combining first-principles and Boltzmann…

Materials Science · Physics 2017-08-23 San-Dong Guo , Jian-Li Wang

We report the violation of the Pauli limit due to intrinsic spin-orbit coupling in SrTiO3 heterostructures. Via selective doping down to a few nanometers, a two-dimensional superconductor is formed, geometrically suppressing orbital…

Superconductivity · Physics 2015-05-28 M. Kim , Y. Kozuka , C. Bell , Y. Hikita , H. Y. Hwang

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…

A rare combination of strong spin-orbit coupling and electron-electron correlations makes the iridate Mott insulator Sr$_2$IrO$_4$ a promising host for novel electronic phases of matter. The resemblance of its crystallographic, magnetic and…

Strongly Correlated Electrons · Physics 2016-01-11 L. Zhao , D. H. Torchinsky , H. Chu , V. Ivanov , R. Lifshitz , R. Flint , T. Qi , G. Cao , D. Hsieh

Dimensionality engineering in A$_{n+1}$B$_n$X$_{3n+1}$ Ruddlesden-Popper (RP) perovskite phases has emerged as a promising strategy to enhance optoelectronic properties. These properties are highly material-dependent, requiring detailed…

Materials Science · Physics 2025-03-04 Surajit Adhikari , Aksaj Bharatwaj , Priya Johari

Cold atoms with laser-induced spin-orbit (SO) interactions provide intriguing new platforms to explore novel quantum physics beyond natural conditions of solids. Recent experiments demonstrated the one-dimensional (1D) SO coupling for boson…