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Chumakov, A. I.; Sturhahn, W.

doi:10.1023/a:1017052730094

Cited by 154 publications

(98 citation statements)

References 26 publications

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“…1(b)). The phonon density of states of the different Sn samples was probed by means of the nuclear resonant inelastic Xray scattering technique (also known as NIS: nuclear inelastic scattering) [37][38][39][40] . With this technique, finely monochromatized synchrotron X-rays (resolution better than 1 meV) are impinging on the sample.…”

Section: Methodsmentioning

confidence: 99%

“…Nuclear forward scattering proceeds elastically, hence it appears only when the energy of the incident radiation matches exactly the energy of the nuclear resonance. The width of the nuclear transition of 119 Sn is negligible on a scale of keV, so that the data of the second detector provide the instrumental function of the high resolution monochromator 38 . This instrumental function is matched to the elastic peak of the NRIXS spectra, which is subtracted.…”

Section: Methodsmentioning

confidence: 99%

“…The densities of phonon states (shown in Fig. 9) up to 20 meV were used to calculate 38,42,62 several thermodynamic parameters characterizing the atomic dynamics 38 in the Sn island samples and Sn cluster-assembled films. This allows to probe the influence of the changes in the phonon behaviour on the thermodynamic quantities.…”

Section: From Vibrational Dynamics To Thermodynamicsmentioning

confidence: 99%

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Lattice dynamics in Sn nanoislands and cluster-assembled films

et al. 2017

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To unravel the effects of phonon confinement, the influence of size and morphology on the atomic vibrations is investigated in Sn nano islands and cluster-assembled films. Nuclear resonant inelastic X-ray scattering is used to probe the phonon density of states of the Sn nanostructures which show significant broadening of the features compared to bulk phonon behaviour. Supported by ab initio calculations, the broadening is attributed to phonon scattering and can be described within the damped harmonic oscillator model. Contrary to the expectations based on previous research, the appearance of high-energy modes above the cut-off energy is not observed. From the thermodynamic properties extracted from the phonon density of states, it was found that grain boundary Sn atoms are bound by weaker forces than bulk Sn atoms.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: From Vibrational Dynamics To Thermodynamicsmentioning

confidence: 99%

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Lattice dynamics in Sn nanoislands and cluster-assembled films

et al. 2017

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“…The applications and technical aspects of NRIXS have been discussed in various publications (see, for example, Sturhahn & Jackson, 2007;Sturhahn, 2004;Rö hlsberger, 2004;Chumakov & Sturhahn, 1999). We collected NRIXS data from a 50 mm-thick iron foil 95% enriched in the resonant 57 Fe isotope at beamline 3-ID of the Advanced Photon Source.…”

Section: Experiments and Resultsmentioning

confidence: 99%

“…The intrinsic temperature dependence of S(E) complicates a detailed study of (16). We calculated the phonon excitation probability from the phonon density-of-states of b.c.c.-Fe determined by NRIXS (Sturhahn, 2004) using the quasiharmonic formalism described earlier (Sturhahn & Jackson, 2007;Chumakov & Sturhahn, 1999;Sturhahn & Kohn, 1999;Singwi & Sjö lander, 1960),…”

Section: Discussionmentioning

confidence: 99%

High-energy-resolution X-ray monochromator calibration using the detailed-balance principle

Zhao

Sturhahn

2012

J Synchrotron Rad

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A new method is presented to calibrate an X-ray energy scale with sub-meV relative accuracy by using the detailed-balance principle of the phonon creation and annihilation. This method is conveniently used to define or verify the energy scale of high-energy-resolution monochromators that are used in inelastic X-ray scattering and nuclear resonant inelastic X-ray scattering instruments at synchrotron radiation facilities. This method does not rely on sample properties and its precision only depends on the statistical data quality. Well calibrated instruments are essential for reliable comparison of data sets obtained at different synchrotron radiation beamlines, of data with theoretical predictions, and of data from other techniques such as neutron or light scattering. The principle of the detailed-balance method is described in this paper and demonstrated experimentally.

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