2013/12/31 by Abhijit Biswas, Ki-Seok Kim, Ki‐Seok Kim +1 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Anderson localization #Condensed matter physics #Electrical resistivity and conductivity #Electronic and Structural Properties of Oxides #Insulator (electricity) #Lattice (music) #Magnetic and transport properties of perovskites and related materials #Materials science #Metal #Metal–insulator transition #Mott insulator #Mott transition #Nanotechnology #Optoelectronics #Physics #Quantum mechanics #Superconductivity #Thin film #cond-mat.str-el
paper · pdf · doi:10.1063/1.4903314
published as J. Appl. Phys. 116, 213704 (2014) · Some figures are redrawn, appears in Journal of Applied Physics
openalex publication_date 2014/12/03 · arxiv created 2014/12/04 · arxiv updated 2014/12/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Understanding of metal insulator transitions in a strongly correlated system, driven by Anderson localization (disorder) and/or Mott localization (correlation), is a long standing problem in condensed matter physics. The prevailing fundamental question would be how these two mechanisms contrive to accomplish emergent anomalous behaviors. Here, we have grown high quality perovskite SrIrO3 thin films, containing a strong spin orbit coupled 5d element Ir, on various substrates such as GdScO3 (110), DyScO3 (110), SrTiO3 (001), and NdGaO3 (110) with increasing lattice mismatch, in order to carry out a systematic study on the transport properties. We found that metal insulator transitions can be induced in this system; by either reducing thickness (on best lattice matched substrate) or changing degree of lattice strain (by lattice mismatch between film and substrates) of films. Surprisingly these two pathways seek two distinct types of metal insulator transitions; the former falls into disorder driven Anderson type whereas the latter turns out to be of unconventional Mott-Anderson type with the interplay of disorder and correlation. More interestingly, in the metallic phases of SrIrO3, unusual non-Fermi liquid characteristics emerge in resistivity as Δρ ∝ Tε with ε evolving from 4/5 to 1 to 3/2 with increasing lattice strain. We discuss theoretical implications of these phenomena to shed light on the metal insulator transitions.