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

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

doi:10.1103/physrevlett.126.175501

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

Journal Article · Mon Apr 26 00:00:00 UTC 2021 · Physical Review Letters

DOI: https://doi.org/10.1103/physrevlett.126.175501 · OSTI ID:1797903

^[1]; Fedotenko, Timofey ^[2];

^[3];

^[2];

^[4];

^[5]; Smith, Jesse S. ^[6];

^[3]; Mahmood, Mohammad F. ^[7]; Goncharov, Alexander F. ^[8];

^[9]; Tasnádi, Ferenc ^[10]; Abrikosov, Alexei I. ^[10]; Bin Masood, Talha ^[10]; Hotz, Ingrid ^[10]; Rudenko, Alexander N. ^[11]; Katsnelson, Mikhail I ^[12];

^[13]; Dubrovinsky, Leonid ^[2]; Abrikosov, Igor A. ^[10]

Carnegie Inst. of Science, Washington, DC (United States); Howard Univ., Washington, DC (United States)
Univ. of Bayreuth (Germany)
Univ. of Chicago, IL (United States)
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
European Synchrotron Radiation Facility (ESRF), Grenoble (France)
Argonne National Lab. (ANL), Argonne, IL (United States)
Howard Univ., Washington, DC (United States)
Carnegie Inst. of Science, Washington, DC (United States)
National Univ. of Science and Technology (MISIS), Moscow (Russian Federation)
Linköping Univ. (Sweden)
Wuhan Univ. (China); Radboud Univ., Nijmegen (Netherlands); Ural Federal Univ., Ekaterinburg (Russian Federation)
Radboud Univ., Nijmegen (Netherlands); Ural Federal Univ., Ekaterinburg (Russian Federation)
Univ. of Bayreuth (Germany); Linköping Univ. (Sweden)

High-pressure chemistry is known to inspire the creation of unexpected new classes of compounds with exceptional properties. In this paper, we employ the laser-heated diamond anvil cell technique for synthesis of a Dirac material BeN₄. A triclinic phase of beryllium tetranitride tr-BeN₄ was synthesized from elements at similar to 85 GPa. Upon decompression to ambient conditions, it transforms into a compound with atomic-thick BeN₄ layers interconnected via weak van der Waals bonds and consisting of polyacetylene-like nitrogen chains with conjugated pi systems and Be atoms in square-planar coordination. Theoretical calculations for a single BeN₄ layer show that its electronic lattice is described by a slightly distorted honeycomb structure reminiscent of the graphene lattice and the presence of Dirac points in the electronic band structure at the Fermi level. The BeN₄ layer, i.e., beryllonitrene, represents a qualitatively new class of 2D materials that can be built of a metal atom and polymeric nitrogen chains and host anisotropic Dirac fermions.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: German Federal Ministry of Education and Research (BMBF); German Research Foundation (DFG); Knut and Alice Wallenberg Foundation; Ministry of Science and Higher Education of the Russian Federation; National Science Foundation (NSF); Russian Science Foundation; Swedish Research Council (SRC); US Army Research Office (ARO); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC02-06CH11357; FG02-94ER14466

OSTI ID:: 1797903

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 126; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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