Graphite Superconductor and use Thereof

A method for manufacturing a device comprising:

• examining a substrate of naturally occurring or artificially produced graphite for presence of a boundary region between a first layer having a Bernal-crystal structure and a second layer having a rhombohedral crystal structure;
• upon determining the presence of the boundary region between the first layer and the second layer, determining a presence of a conducting region in the substrate, wherein the conducting region has a property wherein:
• an inductively induced electric current remains constant over a period of time after a source for inducing the inductively induced electric current is removed when the substrate is maintained at a substrate temperature below a critical temperature;
• and
• the inductively induced electric current stops when the substrate is raised above the critical temperature;
• the inductively induced electric current stops when an applied magnetic flux density is raised above a critical magnetic flux density;
• and
• upon determining the presence of the conducting region, providing one or more of:
• an ohmic contact that is electrically connected to the conducting region;
• a coil that is inductively coupled to the conducting region;
• an electrode that is capacitively coupled to the conducting region;
• or
• an optical element that is electromagnetically coupled with the conducting region;
• wherein the period of time is at least one millisecond.