2008/05/26 by Matteo Calandra, Francesco Mauri · 2 citations
Materials Science · Physics and Astronomy · #Boron and Carbon Nanomaterials Research #Rare-earth and actinide compounds #Superconductivity in MgB2 and Alloys #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.101.016401
4 pages, 3 figures. To appear on Phys. Rev. Lett
arxiv created 2008/05/26 · openalex publication_date 2008/06/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Using density functional theory calculations we show that the recently synthesized superhard diamondlike BC5 is superconducting with a critical temperature of the same order as that of MgB2. The average electron-phonon coupling is \ensuremathλ=0.89, the phonon-frequency logarithmic average is ⟨\ensuremathω⟩log=67.4 meV, and the isotope coefficients are \ensuremathα(C)=0.3 and \ensuremathα(B)=0.2. In BC5, superconductivity is mostly sustained by concerted vibrations of the B atom and its C neighbors.