2001/06/23 by S. K. Kwon, S. J. Youn, Kwon, S. K. +5
Physics and Astronomy · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Superconductivity (cond-mat.supr-con) #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0106483
4 pages including 4 figures
arxiv created 2001/06/23 · arxiv updated 2009/11/30
Based on electronic structure calculations, we have found that noble metal diborides, AgB2 and AuB2, are potential candidates for conventional BCS-type high temperature superconductors. B 2p density of states dominates at the Fermi level in comparison with Ag 4d and Au 5d states. Furthermore, the electron-phonon coupling constant λis much larger in AgB2 and AuB2 than in MgB2. Estimated transition temperatures for AgB2 and AuB2 are Tc = 59 K and 72 K, respectively. These are about 2 ~ 3 times higher than the estimated Tc = 27 K in MgB2 and almost comparable to those in cuprate superconductors.