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 λ=0.89, the phonon-frequency logarithmic average isωlog=67.4meV, and the isotope coefficients are α(C)=0.3 and α(B)=0.2. In BC5, superconductivity is mostly sustained by concerted vibrations of the B atom and its C neighbors. © 2008 The American Physical Society.
High-Tc superconductivity in superhard diamondlike BC5 / Calandra, M.; Mauri, F.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 101:1(2008). [10.1103/PhysRevLett.101.016401]
High-Tc superconductivity in superhard diamondlike BC5
Calandra M.;
2008-01-01
Abstract
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 λ=0.89, the phonon-frequency logarithmic average isωlog=67.4meV, and the isotope coefficients are α(C)=0.3 and α(B)=0.2. In BC5, superconductivity is mostly sustained by concerted vibrations of the B atom and its C neighbors. © 2008 The American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
