|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Frontiers in Advanced Functional Thin Films and Nanostructured Materials
||Discovery of Ferromagnetism and High-temperature Superconductivity in Q-carbon (Plenary Talk)
||Jagdish (Jay) Narayan, Anagh Bhaumik, Ritesh Sachan
|On-Site Speaker (Planned)
||Jagdish (Jay) Narayan
We have discovered high-temperature superconductivity with varying Tc> 36K- 57K in B-doped Q-carbon, where B-concentration is estimated to vary from 17% to 27% (atomic). Undoped Q-carbon with about 80/20 % (Sp3/Sp2) ratio exhibits robust ferromagnetism with Curie temperature >570K. With B-doping ferromagnetism is destroyed and Q-carbon turns diamagnetic and it exhibits high-temperature superconductivity with Tc increasing progressively with B-concentration. The high-temperature superconductivity in B-doped Q-carbon can be rationalized in terms of BCS formalism with enhanced electron-phonon coupling and density of states near the Fermi-level. Detailed Raman and EELS on B-doped Q-carbon are consistent with enhanced electron-phonon coupling and density of states near the Fermi-level. This discovery demonstrates that strongly bonded, light-weight materials, which can be doped with holes, provide an ideal platform for robust high-temperature superconductivity [1-2].
 J. Narayan and A. Bhaumik, JAP 118, 215303 (2015).
 A. Bhaumik, R. Sachan, and J. Narayan, ACS NANO 11, 5351 (2017).
||Planned: Supplemental Proceedings volume