Evidence of a low compressibility carbon nitride with defect-zincblende structure

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  • Jesús Martin-Gil
    ETSII, Paseo del Cauce s/n. Universidad de Valladolid, E-47011 Valladolid, Spain
  • Francisco J. Martin-Gil
    ETSII, Paseo del Cauce s/n. Universidad de Valladolid, E-47011 Valladolid, Spain
  • Mehmet Sarikaya
    Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195
  • Maoxu Qian
    Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195
  • Miguel José-Yacamán
    Instituto de Fı́sica, Universidad Nacional Autónoma de México, 01000 México, F. F. México
  • Angel Rubio
    Departamento Fı́sica Teórica, Universidad de Valladolid, E-47011 Valladolid, Spain

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<jats:p>A carbon-nitride compound with defect zincblende structure (P4̄3m) has been discovered in samples prepared by a chemical precursor route. Crystallographical (high-resolution electron microscopy and electron nanodiffraction) and electron energy loss measurements has been performed to identify the material as cubic zincblende with C3N4 composition. Nanoindentation indicates a high elastic recovery and hardness. The results agree with detailed ab initio calculations on metastable structures and compressibility. Our synthesis method is projected to be a process that could produce large quantities of material by controlling the chemical strategy. The new compound has potential applications for high hardness, elasticity and thermal conductivity materials and thin films.</jats:p>

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