High-Pressure Synthesis of Dirac Materials: Layered van der Waals Bonded 
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 Polymorph

Bykov, Maxim; Fedotenko, Timofey; Chariton, Stella; Laniel, Dominique; Glazyrin, Konstantin; Hanfland, Michael; Smith, Jesse S.; Prakapenka, Vitali B.; Mahmood, Mohammad F.; Goncharov, A. F.; Ponomareva, A. V.; Tasnádi, Ferenc; Abrikosov, Alexei I.; Masood, Talha Bin; Hotz, Ingrid; Руденко, А. Н.; Katsnelson, M. I.; Dubrovinskaia, Natalia; Dubrovinsky, Leonid; Abrikosov, Igor A.

doi:10.1103/physrevlett.126.175501

Cited by 100 publications

(77 citation statements)

References 75 publications

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“…In N∞, N-N bond length (𝑙 𝑁−𝑁 ) is found to be about 1.34 Å which is an intermediate between length of single N-N (1.45 Å) and double N=N (1.21 Å) bonds. Our calculated lattice parameters and bond lengths are in excellent agreements with those in the original experimental work for BeN4 [19]. From inorganic chemistry we know that a few transition metal ions also favor the coordination geometry of Be in BeN4 (square planar coordination), namely, Ni, Cu, Pd, Rh, Ir, Pt, and Au atoms.…”

Section: Resultssupporting

confidence: 84%

“…Worthy to note that it has been theoretically predicted in Ref. [19] that BeN4 monolayer is semimetal with an anisotropic Dirac cone at the Fermi level. It is therefore highly interesting to investigate the evolution of Dirac cone in the electronic structure of MN4 monolayers.…”

Section: Resultsmentioning

confidence: 93%

“…S2). The off-symmetry position of DP in BeN4 is explained to be attributed to the lower lattice symmetry of BeN4 monolayer compared to graphene [19]. The Dirac cone band dispersion is known to lead to an ultrahigh carrier mobility in graphene [36,37].…”

Section: Resultsmentioning

confidence: 99%

“…Despite of extensive and ongoing advances in the experimental realization of various 2D systems, nitrogen-rich lattices remain less explored. In a latest exciting advance by Bykov and coworkers [19], they devised a novel high-pressure approach and succeeded in the realization of BeN4 beryllium polynitrides, a novel nitrogen-rich 2D structure. This latest accomplishment can be promising for the synthesis of a novel class of 2D materials with a chemical formula of MN4, where M is a metal.…”

Section: Introductionmentioning

confidence: 99%

“…This latest accomplishment can be promising for the synthesis of a novel class of 2D materials with a chemical formula of MN4, where M is a metal. Motivated by the experimental realization of BeN4 nanosheet by Bykov et al [19], in this study we examine the thermal and phononic stability, mechanical and electronic features of nitrogen-rich MN4 (M= Be, Mg, Ir, Rh, Ni, Cu, Au, Pd, Pt) monolayer, using density functional theory (DFT) calculations. We particularly examine the application of these nanosheets as anodes for Li, Na or Ca-ion storage.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Ultrahigh stiffness and anisotropic Dirac cones in BeN4 and MgN4 monolayers: a first-principles study

Mortazavi

Shojaei

Zhuang

2021

Materials Today Nano

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Section: Resultssupporting

confidence: 84%

Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Ultrahigh stiffness and anisotropic Dirac cones in BeN4 and MgN4 monolayers: a first-principles study

Mortazavi

Shojaei

Zhuang

2021

Materials Today Nano

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Significant Increase of Electron Thermal Conductivity in Dirac Semimetal Beryllonitrene by Doping Beyond Van Hove Singularity

Tong

Pecchia

Yam

et al. 2022

Adv Funct Materials

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2D beryllium polynitrides or beryllonitrene is a newly synthesized layered material displaying anisotropic Dirac cones and van Hove singularity (VHS) located only ≈0.5 eV above the Fermi level. Using the Boltzmann transport equation with many-body effects and first-principles calculations, it is uncovered that beryllonitrene has an in-plane anisotropic room-temperature phonon thermal conductivity (κ ph ) of 78.6 and 98.8 W mK −1 , and an electron thermal conductivity (κ e ) of 23.0 and 60.7 W mK −1 , along the in-plane directions. κ ph is dominated by the large heat capacity flexural acoustic (ZA) modes, which are susceptible to three-phonon and four-phonon scatterings but rather immune to scattering onto electrons. Filling the Dirac cones till VHS and above gradually enhances the phonon-electron coupling and monotonically decreases κ ph by up to 55%. Instead, κ e displays unusual nonmonotonic variations with the increase in the carrier density and follows the electron density of states at corresponding Fermi levels. The results shed light on the thermal and electrical transport properties in beryllonitrene and reveal a thermal conductivity modulation mechanism that includes a 60% increase of κ e upon filling of the Dirac cones until VHS.

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Single‐Bonded Cubic AsN from High‐Pressure and High‐Temperature Chemical Reactivity of Arsenic and Nitrogen

et al. 2021

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Chemical reactivity between As and N 2 ,l eading to the synthesis of crystalline arsenic nitride,i sh ere reported under high pressure and high temperature conditions generated by laser heating in ad iamond anvil cell. Single-crystal synchrotron X-rayd iffraction at different pressures between 30 and 40 GPaprovides evidence for the synthesis of acovalent compound of AsN stoichiometry,crystallizing in acubic P2 1 3 space group,inwhich eachofthe two elements is single-bonded to three atoms of the other and hosts an electron lone pair,i n at etrahedral anisotropic coordination. The identification of characteristic structural motifs highlights the key role played by the directional repulsive interactions between non-bonding electron lone pairs in the formation of the AsN structure. Additional data indicate the existence of AsN at room temperature from 9.8 up to 50 GPa. Implications concern fundamental aspects of pnictogens chemistry and the synthesis of innovative advanced materials.

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High-Pressure Synthesis of Dirac Materials: Layered van der Waals Bonded BeN4 Polymorph

Cited by 100 publications

References 75 publications

Ultrahigh stiffness and anisotropic Dirac cones in BeN4 and MgN4 monolayers: a first-principles study

Ultrahigh stiffness and anisotropic Dirac cones in BeN4 and MgN4 monolayers: a first-principles study

Significant Increase of Electron Thermal Conductivity in Dirac Semimetal Beryllonitrene by Doping Beyond Van Hove Singularity

Single‐Bonded Cubic AsN from High‐Pressure and High‐Temperature Chemical Reactivity of Arsenic and Nitrogen

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