  Invisible cloak has long captivated the popular conjecture and attracted
intensive research in various communities of wave dynamics, e.g., optics,
electromagnetics, acoustics, etc. However, their inhomogeneous and extreme
parameters imposed by transformation-optic method will usually require
challenging realization with metamaterials, resulting in narrow bandwidth,
loss, polarization-dependence, etc. On the contrary, we demonstrate that
tunable thermodynamic cloak can be achieved with homogeneous and finite
conductivity only employing naturally available materials. The controlled
localization of thermal distribution inside the coating layer has been
presented, and it shows that an incomplete cloak can function perfectly.
Practical realization of such homogeneous thermal cloak has been suggested by
using two naturally occurring conductive materials, which provides an
unprecedentedly plausible way to flexibly realize flexible thermal cloak and
manipulate thermal flow.
