| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Laniel, Dominique
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024Study of the iron nitride FeN into the megabar regimecitations
- 2024High‐Pressure Synthesis of Ultra‐Incompressible, Hard and Superconducting Tungsten Nitridescitations
- 2023Structure determination of ζ-N2 from single-crystal X-ray diffraction and theoretical suggestion for the formation of amorphous nitrogencitations
- 2022Synthesis of Ultra-Incompressible Carbon Nitrides Featuring Three-Dimensional Frameworks of CN4 Tetrahedra Recoverable at Ambient Conditions
- 2022High-pressure synthesis of seven lanthanum hydrides with a significant variability of hydrogen contentcitations
- 2021Nitrosonium nitrate (NO+NO3−) structure solution using in situ single-crystal X-ray diffraction in a diamond anvil cellcitations
- 2021High-Pressure Yttrium Nitride, $Y_{5}N_{14}$, Featuring Three Distinct Types of Nitrogen Dimerscitations
- 2021Nitrosonium nitrate (NO+NO3-) structure solution using in situ single-crystal X-ray diffraction in a diamond anvil cellcitations
- 2021Nitrosonium nitrate (NO$^+$NO$_3$$^{−}$) structure solution using in situ single-crystal X-ray diffraction in a diamond anvil cellcitations
- 2021High-Pressure Synthesis of Dirac Materials: Layered van der Waals Bonded BeN$_{4}$ Polymorphcitations
- 2021High-Pressure Synthesis of the $β-Zn_{3}N_{2}$ Nitride and the $α-ZnN_{4}$ and $β-ZnN_{4}$ Polynitrogen Compoundscitations
- 2020Novel sulfur hydrides synthesized at extreme conditionscitations
- 2020High-Pressure Polymeric Nitrogen Allotrope with the Black Phosphorus Structurecitations
- 2020Proton mobility in metallic copper hydride from high-pressure nuclear magnetic resonancecitations
- 2018Synthesis of polynitrogen compounds by pressure as the next-generation high energy density materials ; Synthèse de polymères d'azote par pression comme matériaux énergétiques du futur
Places of action
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article
High‐Pressure Synthesis of Ultra‐Incompressible, Hard and Superconducting Tungsten Nitrides
Abstract
<jats:title>Abstract</jats:title><jats:p>Transition metal nitrides, particularly those of 5<jats:italic>d</jats:italic> metals, are known for their outstanding properties, often relevant for industrial applications. Among these metal elements, tungsten is especially attractive given its low cost. In this high‐pressure investigation of the W–N system, two novel ultra‐incompressible tungsten nitride superconductors, namely W<jats:sub>2</jats:sub>N<jats:sub>3</jats:sub> and W<jats:sub>3</jats:sub>N<jats:sub>5</jats:sub>, are successfully synthesized at 35 and 56 GPa, respectively, through a direct reaction between N<jats:sub>2</jats:sub> and W in laser‐heated diamond anvil cells. Their crystal structure is determined using synchrotron single‐crystal X‐ray diffraction. While the W<jats:sub>2</jats:sub>N<jats:sub>3</jats:sub> solid's sole constituting nitrogen species are N<jats:sup>3‐</jats:sup> units, W<jats:sub>3</jats:sub>N<jats:sub>5</jats:sub> features both discrete N<jats:sup>3‐</jats:sup> as well as N<jats:sub>2</jats:sub><jats:sup>4‐</jats:sup> pernitride anions. The bulk modulus of W<jats:sub>2</jats:sub>N<jats:sub>3</jats:sub> and W<jats:sub>3</jats:sub>N<jats:sub>5</jats:sub> is experimentally determined to be 380(3) and 406(7) GPa, and their ultra‐incompressible behavior is rationalized by their constituting WN<jats:sub>7</jats:sub> polyhedra and their linkages. Importantly, both W<jats:sub>2</jats:sub>N<jats:sub>3</jats:sub> and W<jats:sub>3</jats:sub>N<jats:sub>5</jats:sub> are recoverable to ambient conditions and stable in air. Density functional theory calculations reveal W<jats:sub>2</jats:sub>N<jats:sub>3</jats:sub> and W<jats:sub>3</jats:sub>N<jats:sub>5</jats:sub> to have a Vickers hardness of 30 and 34 GPa, and superconducting transition temperatures at ambient pressure (50 GPa) of 11.6 K (9.8 K) and 9.4 K (7.2 K), respectively. Additionally, transport measurements performed at 50 GPa on W<jats:sub>2</jats:sub>N<jats:sub>3</jats:sub> corroborate with the calculations.</jats:p>