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- W2070661330 abstract "A first-principles investigation of the electron-phonon interaction in the recently synthesized osmium dinitride $(mathrm{Os}{mathrm{N}}_{2})$ compound predicts that the material is a superconductor. Superconductivity in $mathrm{Os}{mathrm{N}}_{2}$ would originate from the stretching of covalently bonded dinitrogen units embedded in the transition-metal matrix, thus adding dinitrides to the class of superconductors containing covalently bonded light elements. The dinitrogen vibrations are strongly coupled to the electronic states at the Fermi level and generate narrow peaks in the Eliashberg spectral function ${ensuremath{alpha}}^{2}F(ensuremath{omega})$. The total electron-phonon coupling of $mathrm{Os}{mathrm{N}}_{2}$ is $ensuremath{lambda}=0.37$ and the estimated superconducting temperature ${T}_{c}ensuremath{approx}1phantom{rule{0.3em}{0ex}}mathrm{K}$. We suggest that the superconducting temperature can be substantially increased by hole doping of the pristine compound and show that ${T}_{c}$ increases to $4phantom{rule{0.3em}{0ex}}mathrm{K}$ with a doping concentration of 0.25 holes/$mathrm{Os}{mathrm{N}}_{2}$ unit." @default.
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- W2070661330 date "2008-03-10" @default.
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- W2070661330 title "First-principles investigation of the electron-phonon interaction in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi mathvariant=normal>Os</mml:mi><mml:msub><mml:mi mathvariant=normal>N</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>: Theoretical prediction of superconductivity mediated by N-N covalent bonds" @default.
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- W2070661330 doi "https://doi.org/10.1103/physrevb.77.092504" @default.
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