skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Hexagonal-structured ε-NbN: ultra-incompressibility, high shear rigidity and a possible hard superconducting material

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep10811· OSTI ID:1466791
 [1];  [2];  [2];  [2];  [2];  [3];  [4];  [4];  [4];  [2]
  1. State Univ. of New York (SUNY), Stony Brook, NY (United States); Jilin Univ., Changchun (China). State Key Lab. of Superhard Materials
  2. State Univ. of New York (SUNY), Stony Brook, NY (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States); State Univ. of New York (SUNY), Stony Brook, NY (United States)
  4. Jilin Univ., Changchun (China). State Key Lab. of Superhard Materials

Exploring the structural stability and elasticity of hexagonal ε-NbN helps discover correlations among its physical properties for scientific and technological applications. Here, for the first time, we measured the ultra-incompressibility and high shear rigidity of polycrystalline hexagonal ε-NbN using ultrasonic interferometry and in situ X-ray diffraction, complemented with first-principles density-functional theory calculations up to 30 GPa in pressure. Using a finite strain equation of state approach, the elastic bulk and shear moduli, as well as their pressure dependences are derived from the measured velocities and densities, yielding BS0 = 373.3(15) GPa, G0 = 200.5(8) GPa, ∂BS/∂P = 3.81(3) and ∂G/∂P = 1.67(1). The hexagonal ε-NbN possesses a very high bulk modulus, rivaling that of superhard material cBN (B0 = 381.1 GPa). The high shear rigidity is comparable to that for superhard γ-B (G0 = 227.2 GPa). We found that the crystal structure of transition-metal nitrides and the outmost electrons of the corresponding metals may dominate their pressure dependences in bulk and shear moduli. In addition, the elastic moduli, Vickers hardness, Debye temperature, melting temperature and a possible superconductivity of hexagonal ε-NbN all increase with pressures, suggesting its exceptional suitability for applications under extreme conditions.

Research Organization:
Stony Brook Univ., NY (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
NA0001815; SC00112704
OSTI ID:
1466791
Alternate ID(s):
OSTI ID: 1226032; OSTI ID: 1466789
Report Number(s):
BNL-108266-2015-JA; PII: BFsrep10811
Journal Information:
Scientific Reports, Vol. 5, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 41 works
Citation information provided by
Web of Science

References (45)

Transition temperatures and crystal structures of single‐crystal and polycrystalline NbN x films journal March 1974
Polycrystalline γ-boron: As hard as polycrystalline cubic boron nitride journal August 2012
Thermodynamic stability and unusual strength of ultra-incompressible rhenium nitrides journal February 2011
Elastic wave velocities of garnetite with a MORB composition up to 14 GPa journal January 2007
Superconductivity of cubic niobium carbo-nitrides journal February 1967
Pressure-induced structural transition and thermodynamic properties of NbN and effect of metallic bonding on its hardness journal December 2010
The Lindemann and Grüneisen Laws journal April 1956
Supercurrents Through Single-Walled Carbon Nanotubes journal May 1999
The Temperature Factor Parameters of Some Transition Metal Carbides and Nitrides by Single Crystal X-Ray and Neutron Diffraction. journal January 1978
Picosecond response of a superconducting hot-electron NbN photodetector journal July 1998
Elasticity and sound velocities of polycrystalline Mg 3 Al 2 (SiO 4 ) 3 garnet up to 20 GPa and 1700 K journal July 2012
Specific volume measurements of Cu, Mo, Pd, and Ag and calibration of the ruby R 1 fluorescence pressure gauge from 0.06 to 1 Mbar journal June 1978
Thermal equation of state of Mg3Al2Si3O12 pyrope garnet up to 19 GPa and 1,700 K journal June 2012
Homogeneity and constitution of the earth's lower mantle and outer core journal August 1975
Study of the Earth’s interior using measurements of sound velocities in minerals by ultrasonic interferometry journal August 2014
Unusual Pressure Effect on the Shear Modulus in MgAl 2 O 4 Spinel journal November 2013
Hardness analysis of cubic metal mononitrides from first principles journal May 2012
Compressibility measurements and phonon spectra of hexagonal transition-metal nitrides at high pressure: ε TaN , δ MoN , and Cr 2 N journal January 2007
Far-infrared transmission of superconducting homogeneous NbN films: Scattering time effects journal February 1982
XCII. Relations between the elastic moduli and the plastic properties of polycrystalline pure metals journal August 1954
Calculations of thermophysical properties of cubic carbides and nitrides using the Debye–Grüneisen model journal February 2007
Hardness of T -carbon: Density functional theory calculations journal September 2011
Theory for Superconductivity in d-Band Metals conference January 1972
Properties of diamond under hydrostatic pressures up to 140 GPa journal February 2003
Structure des Nitrures de Niobium journal May 1965
Special points for Brillouin-zone integrations journal June 1976
Electronic structure, structural stability, mechanical and superconducting properties of group VB nitrides: A first principles study journal May 2013
Simultaneous ultrasonic and synchrotron x-ray studies on pressure induced α-ω phase transition in zirconium journal January 2008
Electronic stiffness of a superconducting niobium nitride single crystal under pressure journal September 2005
Variation of Elastic Constants and Static Strains with Hydrostatic Pressure: A Method for Calculation from Ultrasonic Measurements journal April 1957
Pressure induced phase transition of molybdenum nitride: A first principles study journal December 2012
Hard superconducting nitrides journal February 2005
Structural, mechanical and electronic properties of 4d transition metal mononitrides by first-principles journal February 2010
Trends in elasticity and electronic structure of transition-metal nitrides and carbides from first principles journal June 2005
Electronic structures of B1 MoN, fcc Mo 2 N, and hexagonal MoN journal March 1985
Soft self-consistent pseudopotentials in a generalized eigenvalue formalism journal April 1990
Electronic mechanism of hardness enhancement in transition-metal carbonitrides journal May 1999
Electronic properties of transition-metal nitrides: The group-V and group-VI nitrides VN, NbN, TaN, CrN, MoN, and WN journal January 1985
First-principles calculations on the elastic and thermodynamic properties of NbN journal December 2012
Elasticity of ω -phase zirconium journal October 2007
Structure and mechanical stability of molybdenum nitrides: A first-principles study journal October 2007
Structure and stability of phases within the NbN–AlN system journal March 2010
Determination of the crystal structure of δ-MoN by neutron diffraction journal April 2004
Transition Temperature of Strong-Coupled Superconductors journal March 1968
Reactive diffusion produced niobium nitride films for superconducting cavity applications
  • Benvenuti, C.; Chiggiato, P.; Parrini, L.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 336, Issue 1-2 https://doi.org/10.1016/0168-9002(93)91077-z
journal November 1993

Cited By (8)

Single-Photon Detection by a Dirty Current-Carrying Superconducting Strip Based on the Kinetic-Equation Approach journal March 2017
Electron-phonon coupling, superconductivity and nontrivial band topology in NbN polytypes text January 2018
Superconductor-Insulator transition in sputtered amorphous MoRu and MoRuN thin films journal March 2018
Electron-phonon coupling, superconductivity, and nontrivial band topology in NbN polytypes journal March 2019
Revealing the Unusual Rigid Boron Chain Substructure in Hard and Superconductive Tantalum Monoboride journal March 2019
Experimental and theoretical studies on the elasticity of tungsten to 13 GPa journal August 2018
Intrinsic Timing Jitter and Latency in Superconducting Nanowire Single-photon Detectors journal March 2019
Discovery of Superconductivity in Hard Hexagonal ε-NbN journal February 2016

Similar Records

Discovery of Superconductivity in Hard Hexagonal ε-NbN
Journal Article · Mon Feb 29 00:00:00 EST 2016 · Scientific Reports · OSTI ID:1466791

Experimental and first-principles studies on the elastic properties of α-hafnium metal under pressure
Journal Article · Wed Mar 30 00:00:00 EDT 2016 · Journal of Applied Physics · OSTI ID:1466791

Experimental and Theoretical Studies on the Elasticity of Molybdenum
Journal Article · Thu Jan 01 00:00:00 EST 2009 · Journal of Applied Physics · OSTI ID:1466791