New developments in micro-X-ray diffraction and X-ray absorption spectroscopy for high-pressure research at 16-BM-D at the Advanced Photon Source

Park, Changyong; Popov, Dmitry; Ikuta, Daijo; Lin, Chuanlong; Kenney‐Benson, Curtis; Rod, Eric; Bommannavar, Arunkumar; Shen, Guoyin

doi:10.1063/1.4926893

Cited by 48 publications

(40 citation statements)

References 55 publications

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“…In situ high pressure synchrotron radiation XRD experiments were performed at 16-BM-D, HPCAT33 of Advanced Photon Source of Argonne National Laboratory using a Mao-Bell symmetric diamond anvil cell (DAC) with a culet of 300 μ m diameter. The as-grown single crystals were ground into fine powder for XRD experiments.…”

Section: Methodsmentioning

confidence: 99%

Pressure-induced iso-structural phase transition and metallization in WSe2

Wang

Chen

Zhou

et al. 2017

Sci Rep

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We present in situ high-pressure synchrotron X-ray diffraction (XRD) and Raman spectroscopy study, and electrical transport measurement of single crystal WSe2 in diamond anvil cells with pressures up to 54.0–62.8 GPa. The XRD and Raman results show that the phase undergoes a pressure-induced iso-structural transition via layer sliding, beginning at 28.5 GPa and not being completed up to around 60 GPa. The Raman data also reveals a dominant role of the in-plane strain over the out-of plane compression in helping achieve the transition. Consistently, the electrical transport experiments down to 1.8 K reveals a pressure-induced metallization for WSe2 through a broad pressure range of 28.2–61.7 GPa, where a mixed semiconducting and metallic feature is observed due to the coexisting low- and high-pressure structures.

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Section: Methodsmentioning

confidence: 99%

Pressure-induced iso-structural phase transition and metallization in WSe2

Wang

Chen

Zhou

et al. 2017

Sci Rep

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“…The X-ray beam with wavelength of 0.4066, 0.3066 or 0.2480 Å was used and focused into a 5 × 6 μm 2 (full width at half maximum, FWHM) spot on the sample3940. Two-dimensional (2D) diffraction images were collected with a PILATUS 1M-F detector or Mar345 Image Plate.…”

Section: Methodsmentioning

confidence: 99%

A metastable liquid melted from a crystalline solid under decompression

et al. 2017

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A metastable liquid may exist under supercooling, sustaining the liquid below the melting point such as supercooled water and silicon. It may also exist as a transient state in solid–solid transitions, as demonstrated in recent studies of colloidal particles and glass-forming metallic systems. One important question is whether a crystalline solid may directly melt into a sustainable metastable liquid. By thermal heating, a crystalline solid will always melt into a liquid above the melting point. Here we report that a high-pressure crystalline phase of bismuth can melt into a metastable liquid below the melting line through a decompression process. The decompression-induced metastable liquid can be maintained for hours in static conditions, and transform to crystalline phases when external perturbations, such as heating and cooling, are applied. It occurs in the pressure–temperature region similar to where the supercooled liquid Bi is observed. Akin to supercooled liquid, the pressure-induced metastable liquid may be more ubiquitous than we thought.

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“…When studying absorption edges over 30 keV, using nanocrystalline diamond as an anvil material can avoid glitches resulting from the diffraction of the single-crystal diamond anvils [216,217]. An alternative beam path through high-strength beryllium and boron gaskets are used in DAC [72,218,219]. …”

Section: Hp X-ray Absorption Near-edge Spectroscopymentioning

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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New developments in micro-X-ray diffraction and X-ray absorption spectroscopy for high-pressure research at 16-BM-D at the Advanced Photon Source

Cited by 48 publications

References 55 publications

Pressure-induced iso-structural phase transition and metallization in WSe2

Pressure-induced iso-structural phase transition and metallization in WSe2

A metastable liquid melted from a crystalline solid under decompression

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

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