2001/11/30 by H. Rösner, H. Rosner, A. Kitaigorodsky +3 · 1 citation
Materials Science · Physics and Astronomy · #Boron and Carbon Nanomaterials Research #Iron-based superconductors research #Superconductivity in MgB2 and Alloys #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.88.127001
Two-column form with five embedded figures
arxiv created 2001/11/30 · openalex publication_date 2002/03/06 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The layered lithium borocarbide LiBC, isovalent with and structurally similar to the superconductor MgB2, is an insulator due to the modulation within the hexagonal layers (BC vs B2). We show that hole doping of LiBC results in Fermi surfaces of B-C p\ensuremathσ character that couple very strongly to B-C bond stretching modes, precisely the features that lead to superconductivity at Tc\ensuremath≃40K in MgB2. Comparison of Li0.5BC with MgB2 indicates the former to be a prime candidate for electron-phonon coupled superconductivity at substantially higher temperature than in MgB2.