The high entropy materials have been dealt with as a new playground of the material 

engineering, since the functionality of the materials is expected to enhance by controlling the 

new degrees of freedom. Also, this recently emerging field flips traditional condensed matter 

physics paradigms on their head by seeking to understand what properties arise in the 

presence of profound configurational disorder. However, the fundamental physics governing 

these materials, including the true degree of configurational entropy, its role in stabilizing the 

structure, and its effect on other physical properties such as magnetism and electrical transport 

all remain open questions. A key roadblock towards achieving a deeper understanding of high

configurational entropy in solids has been the inability to study these materials in single crystal 

form. Although the imperative to study in single crystal form are clear, many crystal growth 

methods are excluded because the synthesizing it requires high levels of both thermodynamic 

and kinetic control. In the first half of this talk, I will showcase that floating zone crystal growth 

is the optimal method to unlock this new frontier, and present my recent achievements in the 

high-entropy crystal growth. In the latter part, we will discuss impacts of high-entropy

configurations on the electronic homogeneity in the electron-doped cuprate high-Tc

superconductors