Spherical analyzers and monochromators for resonant inelastic hard X-ray scattering: a compilation of crystals and reflections

Gög, T.; Casa, D.; Said, Ayman; Upton, M. H.; Kim, Jungho; Kuzmenko, Ivan; Huang, Xianrong; Khachatryan, Ruben

doi:10.1107/s0909049512043154

Cited by 53 publications

(36 citation statements)

References 18 publications

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“…A single crystal of Sr 2 IrO 4 of 1 mm Â 1 mm size grown by the flux method was mounted in a displex closed-cycle cryostat and measured at 15 K. The RIXS measurements were performed using the MERIX spectrometer at the 30-ID beamline 43 of the Advanced Photon Source. X-rays were monochromatized to a bandwidth of 15 meV, and focused to have a beam size of 45(H) Â 30(V) mm 2 .…”

Section: Methodsmentioning

confidence: 99%

Excitonic quasiparticles in a spin–orbit Mott insulator

et al. 2014

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In condensed matter systems, out of a large number of interacting degrees of freedom emerge weakly coupled quasiparticles (QPs), in terms of which most physical properties are described. The lack of identification of such QPs is a major barrier for understanding myriad exotic properties of correlated electrons, such as unconventional superconductivity and non-Fermi liquid behaviours. Here we report the observation of a composite particle in a quasi-two-dimensional spin-1/2 antiferromagnet Sr 2 IrO 4 -an exciton dressed with magnons-that propagates with the canonical characteristics of a QP: a finite QP residue and a lifetime longer than the hopping time scale. The dynamics of this charge-neutral excitation mirrors the fundamental process of the analogous one-hole propagation in the background of spins-1/2, and reveals the same intrinsic dynamics that is obscured for a single, charged-hole doped into two-dimensional cuprates.

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Section: Methodsmentioning

confidence: 99%

Excitonic quasiparticles in a spin–orbit Mott insulator

et al. 2014

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“…For this case the peak-peak slope error is about 33 12 W and peak power density 2.3 W/mm 2 . By applying Bragg angle at this energy and the slope error at the surface to the following equation [7], = (1) the resultant energy spread is about 1.5 eV. As a comparison the power absorption under the APS MBA lattice is also applied to the water cooling monochromator at the same energy.…”

Section: Fea Evaluationmentioning

confidence: 99%

High-heat-load monochromator options for the RIXS beamline at the APS with the MBA lattice

Liu¹,

Gög²,

Stoupin³

et al. 2016

AIP Conference Proceedings

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“…Significant efforts have been made to improve the energy resolution to probe fine electronic structures, including Bragg angle close to back-scattering geometry and the use of diced crystals coupled with an area detector [274,277]. For RIXS using MERIX instruments, only a limited number of suitable analyzers have been established [278].…”

Section: Hp Resonant Inelastic X-ray Scatteringmentioning

confidence: 99%

High-pressure studies with x-rays using diamond anvil cells

2016

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Pressure profoundly alters all states of matter. The symbiotic development of ultrahighpressure diamond anvil cells, to compress samples to sustainable multi-megabar pressures; and synchrotron x-ray techniques, to probe materials' properties in situ, has enabled the exploration of rich high-pressure (HP) science. In this article, we first introduce the essential concept of diamond anvil cell technology, together with recent developments and its integration with other extreme environments. We then provide an overview of the latest developments in HP synchrotron techniques, their applications, and current problems, followed by a discussion of HP scientific studies using x-rays in the key multidisciplinary fields. These HP studies include: HP x-ray emission spectroscopy, which provides information on the filled electronic states of HP samples; HP x-ray Raman spectroscopy, which probes the HP chemical bonding changes of light elements; HP electronic inelastic x-ray scattering spectroscopy, which accesses high energy electronic phenomena, including electronic band structure, Fermi surface, excitons, plasmons, and their dispersions; HP resonant inelastic x-ray scattering spectroscopy, which probes shallow core excitations, multiplet structures, and spin-resolved electronic structure; HP nuclear resonant x-ray spectroscopy, which provides phonon densities of state and time-resolved Mössbauer information; HP x-ray imaging, which provides information on hierarchical structures, dynamic processes, and internal strains; HP x-ray diffraction, which determines the fundamental structures and densities of single-crystal, polycrystalline, nanocrystalline, and non-crystalline materials; and HP radial x-ray diffraction, which yields deviatoric, elastic and rheological information. Integrating these tools with hydrostatic or uniaxial pressure media, laser and resistive heating, and cryogenic cooling, has enabled investigations of the structural, vibrational, electronic, and magnetic properties of materials over a wide range of pressure-temperature conditions.

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Spherical analyzers and monochromators for resonant inelastic hard X-ray scattering: a compilation of crystals and reflections

Cited by 53 publications

References 18 publications

Excitonic quasiparticles in a spin–orbit Mott insulator

Excitonic quasiparticles in a spin–orbit Mott insulator

High-heat-load monochromator options for the RIXS beamline at the APS with the MBA lattice

High-pressure studies with x-rays using diamond anvil cells

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