4. Bottom-up approach: a gateway to mesoscopic physics

From a structural point of view, molecule magnets can therefore be considered as intermediates between massive magnets and isolated atoms. It was this point that first attracted physicists to magnetochemical objects. Indeed, the size of magnet molecules makes them ideal for studying the boundary between the macroscopic world, governed by classical physics, and the nanoscopic world governed by quantum physics. This so-called mesoscopic world is home to unique physical phenomena such as quantum interference