This site has a 3d grid looking like a sombrero as a logo. Does it represent some specific physical phenomenon or is it just art?
Whilst I can almost guarantee the author of the logo did not have this in mind when creating it; a physical phenomenon that may be described via such a potential is the Two-Level-System (TLS) defects we see in superconducting circuitry that involve Josephson junctions. In a recent paper we describe what occurs when an oxygen atom delocalises around an Al-Al bond axis. The potential of the rotationally symmetric case is a "mexican hat" - exactly like the logo.