Synthesis of Superconducting Boron-Doped Diamond in Carbon and Boron Solutions in Molten Gold and Copper
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2023-09-01 |
| Journal | Inorganic Materials |
| Authors | Е. А. Екимов, V. A. Sidorov, Р. А. Хмельницкий, S. G. Lyapin |
| Institutions | P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Institute for High Pressure Physics |
Abstract
Section titled “Abstract”The Au-B-C and Cu-B-C growth systems, which do not form borides, have been used for the first time for the synthesis of boron-doped superconducting diamond. In these systems, the graphite-to-diamond transformation occurs at pressures from 8 to 9 GPa and temperatures from 1620 to 1770 K, suitable for commercial-scale production. The presence of boron in melts is assumed to be responsible for the decrease in synthesis temperature in molten copper and the diamond-forming ability of gold-based melts. The synthesized diamond exhibits metallic behavior of conductivity at ordinary temperatures and undergoes a superconducting transition between 4.5 and 2.5 K.