Atomic-Scale Visualization of Ultrafast Bond Breaking in X-Ray-Excited Diamond

Inoue, Ituro; Deguchi, Yuka; Ziaja, Beata; Osaka, Taito; Abdullah, Malik Muhammad; Jurek, Zoltán; Medvedev, Nikita; Tkachenko, Victor; Inubushi, Yuichi; Kasai, Hidetaka; Tamasaku, Kenji; Hara, Toru; Nishibori, Eiji; Yabashi, Makina

doi:10.1103/physrevlett.126.117403

Cited by 37 publications

(28 citation statements)

References 54 publications

(58 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, fast heating of water by the first pulse was observed at high pulse fluences, which on the one hand did not allow measurement of equilibrium dynamics from such pulses, on the other hand demonstrates the usage of split-and-delay lines for pumpprobe applications. Nevertheless, these studies promise to use split-and-delay techniques in a pump-probe or laser pump -X-ray probe-probe scheme for many other questions, e.g., tracking the kinetics of melting of different materials on femto-to picosecond time scales by laser or X-ray pulses [181][182][183].…”

Section: Split-and-delay Linesmentioning

confidence: 99%

From Femtoseconds to Hours—Measuring Dynamics over 18 Orders of Magnitude with Coherent X-rays

2021

View full text Add to dashboard Cite

X-ray photon correlation spectroscopy (XPCS) enables the study of sample dynamics between micrometer and atomic length scales. As a coherent scattering technique, it benefits from the increased brilliance of the next-generation synchrotron radiation and Free-Electron Laser (FEL) sources. In this article, we will introduce the XPCS concepts and review the latest developments of XPCS with special attention on the extension of accessible time scales to sub-μs and the application of XPCS at FELs. Furthermore, we will discuss future opportunities of XPCS and the related technique X-ray speckle visibility spectroscopy (XSVS) at new X-ray sources. Due to its particular signal-to-noise ratio, the time scales accessible by XPCS scale with the square of the coherent flux, allowing to dramatically extend its applications. This will soon enable studies over more than 18 orders of magnitude in time by XPCS and XSVS.

show abstract

Section: Split-and-delay Linesmentioning

confidence: 99%

From Femtoseconds to Hours—Measuring Dynamics over 18 Orders of Magnitude with Coherent X-rays

2021

View full text Add to dashboard Cite

show abstract

“…Highly excited matter created after intense X-ray radiation is an object of intense experimental studies with high power laser sources, in particular, with free electron lasers (FELs), see e.g., [7,9,21]. The experiments trace non-equilibrium mechanisms of plasma formation, also through a transient state of warm dense matter [12,22,24].…”

Section: Introductionmentioning

confidence: 99%

Tracing X-ray-induced formation of warm dense gold with Boltzmann kinetic equations

et al. 2021

Self Cite

View full text Add to dashboard Cite

In this paper, we report on the Boltzmann kinetic equation approach adapted for simulations of warm dense matter created by irradiation of bulk gold with intense ultrashort X-ray pulses. X-rays can excite inner-shell electrons, which triggers creation of deep-lying core holes. Their relaxation, especially in heavier elements such as gold (atomic number $$Z= 79$$ Z = 79 ) takes complicated pathways, involving collisional processes, and leading through a large number of active configurations. This number can be so high that solving a set of evolution equations for each configuration becomes computationally inefficient, and another modeling approach should be used instead. Here, we use the earlier introduced ’predominant excitation and relaxation path’ approach. It still uses true atomic configurations but limits their number by restricting material relaxation to a selected set of predominant pathways for material excitation and relaxation. With that, we obtain time-resolved predictions for excitation and relaxation in X-ray irradiated bulk of gold, including the respective change of gold optical properties. We compare the predictions with the available data from high-energy-density experiments. Their good agreement indicates ability of the Boltzmann kinetic equation approach to describe warm dense matter created from high-Z materials after their irradiation with X rays, which can be validated in future experiments. Graphic Abstract

show abstract

“…This powerful technique is being improved in its spatial resolution [25][26][27] toward atomic resolution. It can also provide an access to ultrafast dynamics within X-ray-irradiated samples with femtosecond temporal resolution [28], using the X-ray pump-X-ray probe experimental scheme.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, this should enable the study of ultrafast structural transitions in solid materials, triggered by an X-ray pump pulse. However, the results of such experiments have to be interpreted with care [24,28], due to the non-uniformity of the X-ray beam [29]. As the imaged object, e.g., a single crystal, is large in comparison with the beam focal size, the imaging signal includes contributions from the crystal regions illuminated weaker or stronger, depending on their position in respect to the beam focus.…”

Section: Introductionmentioning

confidence: 99%

Limitations of Structural Insight into Ultrafast Melting of Solid Materials with X-ray Diffraction Imaging

et al. 2021

Self Cite

View full text Add to dashboard Cite

In this work, we analyze the application of X-ray diffraction imaging techniques to follow ultrafast structural transitions in solid materials using the example of an X-ray pump–X-ray probe experiment with a single-crystal silicon performed at a Linac Coherent Light Source. Due to the spatially non-uniform profile of the X-ray beam, the diffractive signal recorded in this experiment included contributions from crystal parts experiencing different fluences from the peak fluence down to zero. With our theoretical model, we could identify specific processes contributing to the silicon melting in those crystal regions, i.e., the non-thermal and thermal melting whose occurrences depended on the locally absorbed X-ray doses. We then constructed the total volume-integrated signal by summing up the coherent signal contributions (amplitudes) from the various crystal regions and found that this significantly differed from the signals obtained for a few selected uniform fluence values, including the peak fluence. This shows that the diffraction imaging signal obtained for a structurally damaged material after an impact of a non-uniform X-ray pump pulse cannot be always interpreted as the material’s response to a pulse of a specific (e.g., peak) fluence as it is sometimes believed. This observation has to be taken into account in planning and interpreting future experiments investigating structural changes in materials with X-ray diffraction imaging.

show abstract

Atomic-Scale Visualization of Ultrafast Bond Breaking in X-Ray-Excited Diamond

Cited by 37 publications

References 54 publications

From Femtoseconds to Hours—Measuring Dynamics over 18 Orders of Magnitude with Coherent X-rays

From Femtoseconds to Hours—Measuring Dynamics over 18 Orders of Magnitude with Coherent X-rays

Tracing X-ray-induced formation of warm dense gold with Boltzmann kinetic equations

Limitations of Structural Insight into Ultrafast Melting of Solid Materials with X-ray Diffraction Imaging

Contact Info

Product

Resources

About