Article
Version 2
Preserved in Portico This version is not peer-reviewed
Path for Room-Temperature Superconductivity in Q-Carbon Related Materials
Version 1
: Received: 19 June 2023 / Approved: 20 June 2023 / Online: 20 June 2023 (04:43:37 CEST)
Version 2 : Received: 27 October 2023 / Approved: 30 October 2023 / Online: 30 October 2023 (09:01:40 CET)
Version 2 : Received: 27 October 2023 / Approved: 30 October 2023 / Online: 30 October 2023 (09:01:40 CET)
A peer-reviewed article of this Preprint also exists.
Narayan, J. Path for Room-Temperature Superconductivity in Q-Carbon-Related Materials. C 2024, 10, 14. Narayan, J. Path for Room-Temperature Superconductivity in Q-Carbon-Related Materials. C 2024, 10, 14.
Abstract
We present atomic structures and nonequilbrium synthesis of new class of materials, where the basic structural unit is a diamond tetrahedron. When units of one, two, and three tetrahedra are randomly packed, we create distinct phases of amorphous Q-carbon. Four tetrahedra in two adjacent layers lead to crystalline diamond lattice, which has four missing tetrahedra alternately. When these four missing tetrahedra are filled, we create subunit cell of crystalline Q-diamond. Theoretical calculations show that superconducting transition temperature (Tc) in 50 atomic % B-doped Q-diamond can reach near room temperature at ambient pressures. This is consistent with our earlier results using low-loss EELS measurements in 50 atomic % B-doped Q-carbon, which had mostly amorphous QB3 phase mixed with some crystalline Q-diamond phase. These EELS results showed that the Tc for these samples was in between 90K and 300K. Theoretical calculations of density of states, Eliashberg function, electron-phonon interaction parameter, and root-mean-square and logarithmic average of frequency in crystalline Q-diamond show Tc in the range of 268K to 300K, which is in a complete agreement with our EELS results in QB3.
Keywords
BCS superconductivity; RT superconductivity; B-doped Q-carbon; B-doped diamond
Subject
Engineering, Other
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Comments (0)
We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.
Leave a public commentSend a private comment to the author(s)
* All users must log in before leaving a comment