Hi,
What kind of doping will you use to make diamond superconducting ?
I have also currently started exploring vortix dynamics in boron doped superconducting diamonds using an NV layer on it. Hence I would love to hear about your project too.
Thank You,
Zainab.
Dear Zainab! I used undoped detonation nanodiamond powder. It was assumed that the spin system is sensitive to the microwave field and to the polarizing external magnetic field under conditions of paramagnetic resonance. Good luck in your research! Sincerely, Natalia Lapchuk
Thank you Наталья Михайловна Лапчук and Behnam Farid
for the reply.
Undoped detonation nanodiamond powder is not superconducting and likely to show all manner of magnetic effects from trace metal contaminants. This is not the Meisner effect, just very hard to remove metals from he detonation chamber. The only diamond that has shown clear superconductivity is boron doped beyond the Metal-Insulator Transition.
Graphene without any metallic impurity is a superconductor. In the case of a “pure” DNA, we did not look for superconductivity. We tried to find out whether such a huge number of unpaired electrons can be controlled by a magnetic field under EPR conditions. As a result, it was found that the EPR signal from the DNA disappeared while registering the signal from the standard. If the microwave field does not penetrate into the detonation nanodiamond core, then when recording the EPR spectrum, we will not see 80 - 90% of free radicals that are under the DND shell. This is the only way to explain the loss of the spectrum.
My understanding is that graphene is superconductivity when two sheets are at a "magic angle" to one another.
https://www.nature.com/articles/nature26160
Article Tuning superconductivity in twisted bilayer graphene
The nanodiamond shell may represent fragmentarily compressed graphene layers. A "magic" angle of the order of 1.14 degrees - who will determine it in this configuration? The word "magic" itself, I think, was written so that someone would pay attention to such an inconspicuous corner :). Forgive me, please, for my reasoning. I have no right to talk about it at all, because not a specialist in superconductivity. Thank you for your attention and questions to my research. Recently received DNA samples doped with boron with different contents. I will repeat studies with students.
The magic angle is just the angle at which the Fermi velocity drops to zero, 1.1º. I don't really like the use of the word magic either. With regards to DND, they are very adsorbing to microwaves due to the concentration of sp, sp2 etc bonds at the surface, I attach couple of papers which show this and how the adsorption is a lot less in larger particles with cleaner surfaces.