Toroidal diamond anvil cell for detailed measurements under extreme static pressures

Dewaele, Agnès; Loubeyre, P.; Occelli, F.; Marie, Olivier; Mézouar, M.

doi:10.1038/s41467-018-05294-2

Cited by 147 publications

(120 citation statements)

References 51 publications

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“…It is used here for metals, diamond and alkali halides and its extrapolation beyond the pressure range where the data have been fitted is not fully justified. However, it has been observed that the extrapolation of gold EoS with a Rydberg-Vinet formulation beyond the measured compression range agrees well with measurements carried out later up to 600 GPa [17]. This possibility should be confirmed on other materials.…”

Section: Methodssupporting

confidence: 77%

Equations of State of Simple Solids (Including Pb, NaCl and LiF) Compressed in Helium or Neon in the Mbar Range

Dewaele

2019

Minerals

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The equations of state measured under ambient temperature in the Mbar range are reviewed, focusing on experiments using diamond anvils cells with a quasi-hydrostatic pressure transmitting medium (helium or neon) and coupled with X-ray diffraction. Equations of state (EoS) parameters are listed with an unified pressure metrology for all data. This metrology is based on the efforts made in the 2000s to update the ruby luminescence pressure scale, after the collection of original data. To complete this database, unpublished P-V data for lead (Pb), sodium chloride (NaCl) and lithium fluoride (LiF) are also provided with the same metrology. Systematic effects of the pressure metrology on the EoS parameters are discussed.

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Section: Methodssupporting

confidence: 77%

Equations of State of Simple Solids (Including Pb, NaCl and LiF) Compressed in Helium or Neon in the Mbar Range

Dewaele

2019

Minerals

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“…The future in DAC foresees many more developments, mainly on two fronts: I) focus ion beam techniques will play a fundamental role in DAC, permitting to sculpt futuristic microanvils (<20 µm) which will extend the range of pressure well above the 400 GPa, the ceiling pressure for one-stage DAC. Recently, micromilling gem-quality diamond tips shaped in toroidal form have been shown to greatly extend the accessible pressure up to ∼ 550 to 600 GPa on DACs [117,118,119]. II) thanks to the advancements on characterization techniques such as new X-ray sources in synchrotron and X-ray free electron lasers, producing much brighter, subµ-beams will enable the study of compression volumes of only tenths of picolitres [116].…”

Section: Diamond Anvilsmentioning

confidence: 99%

A perspective on conventional high-temperature superconductors at high pressure: Methods and materials

et al. 2020

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Two hydrogen-rich materials: H 3 S and LaH 10 , synthesized at megabar pressures have revolutionized the field of superconductivity by providing a first glimpse into the solution for the hundred-year-old problem of room-temperature superconductivity. The mechanism governing these exceptional superconductors is the conventional electron-phonon coupling. Here, we describe recent advances in experimental techniques, superconductivity theory and first-principles computational methods, which made this discovery possible. The aim of this work is to provide an up-to-date compendium of the available results on superconducting hydrides and explain the synergy of different methodologies that led to the extraordinary discoveries in the field. Furthermore, in an attempt to evidence empirical rules governing superconductivity in binary hydrides under pressure, we discuss general trends in electronic structure and chemical bonding. The last part of the Review introduces possible strategies to optimize pressure and transition temperatures in conventional superconducting materials. Directions for future research in areas of theory, computational methods and high-pressure experiments are proposed, in order to advance our understanding of superconductivity.

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“…Here we utilize a toroidal diamond anvil design first reported by Deweale et al 23–25 and Loubeyre et al 26 . The toroidal anvil is well established in the large volume press community 27 .…”

Section: Introductionmentioning

confidence: 99%

Single crystal toroidal diamond anvils for high pressure experiments beyond 5 megabar

et al. 2018

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Static compression experiments over 4 Mbar are rare, yet critical for developing accurate fundamental physics and chemistry models, relevant to a range of topics including modeling planetary interiors. Here we show that focused ion beam crafted toroidal single-crystal diamond anvils with ~9.0 μm culets are capable of producing pressures over 5 Mbar. The toroidal surface prevents gasket outflow and provides a means to stabilize the central culet. We have reached a maximum pressure of ~6.15 Mbar using Re as in situ pressure marker, a pressure regime typically accessed only by double-stage diamond anvils and dynamic compression platforms. Optimizing single-crystal diamond anvil design is key for extending the pressure range over which studies can be performed in the diamond anvil cell.

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Toroidal diamond anvil cell for detailed measurements under extreme static pressures

Cited by 147 publications

References 51 publications

Equations of State of Simple Solids (Including Pb, NaCl and LiF) Compressed in Helium or Neon in the Mbar Range

Equations of State of Simple Solids (Including Pb, NaCl and LiF) Compressed in Helium or Neon in the Mbar Range

A perspective on conventional high-temperature superconductors at high pressure: Methods and materials

Single crystal toroidal diamond anvils for high pressure experiments beyond 5 megabar

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