Correlated Electron Metals with High Entropy: Thin Film Growth and Properties

Novel conducting complex oxides with high electron correlation are of keen interest for UV-transparent applications, magnetoelectic devices, and as hosts for fundamental studies of correlated electron systems. SrBO₃ cubic perovskites with early transition metals are intriuging to explore due to their tunable electrical conductivity and transparency. Utilizing a high configurational entropy formulation, the high symmetry perovskite phase can be stabilized with five cations on the perovskite B-site. Our results show that Sr_x(Ti,Nb,Cr,Mo,W)O₃ thin films grown by pulsed laser deposition exhibit unique combination of chemical disorder and high crystalline fidelity. This combination produces significant electron correlation, low electrical resistivity, and an optical transparency window that surpasses that of constituent end-members