scholarly journals Spin-orbit coupling in iridium-based 5dcompounds probed by x-ray absorption spectroscopy

2012 ◽  
Vol 86 (19) ◽  
Author(s):  
J. P. Clancy ◽  
N. Chen ◽  
C. Y. Kim ◽  
W. F. Chen ◽  
K. W. Plumb ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
X Ray ◽  
X Ray Absorption

Au 4f spin–orbit coupling effects in supported gold nanoparticles

2016 ◽  
Vol 18 (33) ◽  
pp. 22778-22782 ◽  
Author(s):  
Sergey P. Chenakin ◽  
Norbert Kruse
Keyword(s):  
Gold Nanoparticles ◽  
Au Nanoparticles ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Coupling Effects ◽  
X Ray ◽  
Supported Gold Nanoparticles ◽  
Supported Gold

We reveal that the ratio of spin–orbit components in X-ray photoelectron Au 4f spectra of titania-supported gold nanoparticles deviates from the statistical ratio 4 : 3 and demonstrates an appreciable dependence on the concentration of Au atoms on the surface of TiO2 support and size of Au nanoparticles.

An overview on the research of Sr2IrO4-based system probed by X-ray absorption spectroscopy

2018 ◽  
Vol 32 (08) ◽  
pp. 1850094
Author(s):  
Jie Cheng ◽  
Chaomin Zhu ◽  
Jingyuan Ma ◽  
Yu Wang ◽  
Shengli Liu
Keyword(s):  
Absorption Spectroscopy ◽  
Lattice Structure ◽  
Theoretical Calculations ◽  
Parent Compound ◽  
Transition Metal Ions ◽  
Spin Orbit Coupling ◽  
X Ray ◽  
Local Lattice ◽  
Carrier Doping ◽  
X Ray Absorption

Investigations of materials with 5d transition metal ions have opened up new paradigms in condensed-matter physics because of their large spin-orbit coupling (SOC) interactions. The typical compound is Sr2IrO4, which attracted much attention due to its similarities to the parent compound of high-[Formula: see text] cuprate superconductor La2CuO4. Theoretical calculations predicted that the unconventional superconductivity can occur in carrier doped-Sr2IrO4 system. Until now, hundreds of experimental methods were devoted to investigate the carrier doping effect on Sr2IrO4. Synchrotron radiation-based X-ray absorption spectroscopy (XAS) made great contributions to the local lattice and electronic structure, and also the intimate relationship between the local structure and physical properties induced by carrier doping. The aim of this review is a short introduction to the progress of research on Sr2IrO4-based system probed by the unique technique — XAS, including the strength of the SOC, valence changes upon doping and even local lattice structure with atomic level for this Sr2IrO4-based family.

scholarly journals La-doping effect on spin–orbit coupled Sr2IrO4probed by x-ray absorption spectroscopy

2016 ◽  
Vol 18 (9) ◽  
pp. 093019 ◽  
Author(s):  
Jie Cheng ◽  
Xuanyong Sun ◽  
Shengli Liu ◽  
Bin Li ◽  
Haiyun Wang ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Doping Effect ◽  
Spin Orbit ◽  
X Ray ◽  
La Doping ◽  
X Ray Absorption

scholarly journals Rotation-Activity Connections in Main Sequence Binaries

1983 ◽  
Vol 71 ◽  
pp. 475-477 ◽  
Author(s):  
O. Vilhu ◽  
S.M. Rucinski
Keyword(s):  
Transition Region ◽  
Main Sequence ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Main Sequence Stars ◽  
X Ray

We have studied transition-region (NV + SilV + CIV) and chromospheric (MgII) emission observed with IUE (Vilhu and Rucinski, 1982; Rucinski and Vilhu, 1982; Ayres et al., 1981) together with coronal (soft X-ray) emission observed with the Einstein satellite (Cruddace and Dupree, 1982; Walter, 1982) for contact (W UMa) and detached main sequence binaries. The components are main sequence stars (or near ms) and rapid rotators due to spin-orbit coupling. They can thus be expected to give information of dynamo-processes in rapid rotators, although the binary effects clearly produce extra complications in this discussion.

scholarly journals Solvation and Speciation of Cobalt(II). A Theoretical X-Ray Absorption and RIXS Study

2019 ◽  
Author(s):  
Basmah H. Allehyani ◽  
Walid I. Hassan ◽  
Saadullah Aziz ◽  
Rifaat H. Hilal ◽  
Oliver Kühn ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Absorption Spectra ◽  
Aqua Complex ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Dynamical Correlation ◽  
X Ray ◽  
Spectral Signatures ◽  
Spectroscopic Signatures ◽  
X Ray Absorption

<p>The X-ray spectroscopic signatures of solvated Co<sup>2+</sup> ions mimicking the aqueous solution of CoCl<sub>2</sub> are investigated accounting for multiconfigurational as well as spin-orbit coupling effects. To this end the RASSCF/RASSI methodology with second order corrections due to dynamical correlation (RASPT2) is employed. Emphasis is put on the identification of spectral signatures of different species in octahedral, [Co(H<sub>2</sub>O)<sub>6</sub><sub>-</sub><sub>x</sub>Cl<sub>x</sub>]<sup>(2</sup><sup>-</sup><sup>x)+</sup>, and tetrahedral, [Co(H<sub>2</sub>O)<sub>4</sub><sub>-</sub><sub>x</sub>Cl<sub>x</sub>]<sup>(2</sup><sup>-</sup><sup>x)+</sup>,coordination. X-ray absorption spectra show distinct differences in the L<sub>3</sub> band only. Here, the best agreement is obtained for the hexa-aqua complex [Co(H<sub>2</sub>O)<sub>6</sub>]<sup>2+</sup>. For better identification it is proposed to use RIXS spectroscopy, which shows pronounced species-dependent inelastic features.</p><p><br></p>

scholarly journals Solvation and Speciation of Cobalt(II). A Theoretical X-Ray Absorption and RIXS Study

2020 ◽  
Author(s):  
Basmah H. Allehyani ◽  
Walid I. Hassan ◽  
Saadullah Aziz ◽  
Rifaat H. Hilal ◽  
Oliver Kühn ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Absorption Spectra ◽  
Aqua Complex ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Dynamical Correlation ◽  
X Ray ◽  
Spectral Signatures ◽  
Spectroscopic Signatures ◽  
X Ray Absorption

<p>The X-ray spectroscopic signatures of solvated Co<sup>2+</sup> ions mimicking the aqueous solution of CoCl<sub>2</sub> are investigated accounting for multiconfigurational as well as spin-orbit coupling effects. To this end the RASSCF/RASSI methodology with second order corrections due to dynamical correlation (RASPT2) is employed. Emphasis is put on the identification of spectral signatures of different species in octahedral, [Co(H<sub>2</sub>O)<sub>6</sub><sub>-</sub><sub>x</sub>Cl<sub>x</sub>]<sup>(2</sup><sup>-</sup><sup>x)+</sup>, and tetrahedral, [Co(H<sub>2</sub>O)<sub>4</sub><sub>-</sub><sub>x</sub>Cl<sub>x</sub>]<sup>(2</sup><sup>-</sup><sup>x)+</sup>,coordination. X-ray absorption spectra show distinct differences in the L<sub>3</sub> band only. Here, the best agreement is obtained for the hexa-aqua complex [Co(H<sub>2</sub>O)<sub>6</sub>]<sup>2+</sup>. For better identification it is proposed to use RIXS spectroscopy, which shows pronounced species-dependent inelastic features.</p><p><br></p>

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