Hole-driven MIT theory, Mott transition in VO_2, MoBRiK
  For inhomogeneous high-T_c superconductors, hole-driven metal-insulator transition (MIT) theory explains that the gradual increase of conductivity with increasing hole doping is due to inhomogeneity with the local Mott system undergoing the first-order MIT and the local non-Mott system. For VO_2, a monoclinic and correlated metal (MCM) phase showing the linear characteristic as evidence of the Mott MIT is newly observed by applying electric field and temperature. The structural phase transition occurs between MCM and Rutile metal phases. Devices using the MIT are named MoBRiK. 
Hyun-Tak Kim, Bong-Jun Kim, Yong Wook Lee, Byung-Gyu Chae, Sun Jin   Yun, and Kwang-Yong Kang