2015/05/29 by Tom Hogan, Z. Yamani, D. Walkup +11 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Condensed matter physics #Doping #Electrical resistivity and conductivity #Electron #Magnetic and transport properties of perovskites and related materials #Materials science #Metal #Metal–insulator transition #Mott insulator #Phase (matter) #Phase boundary #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin (aerodynamics) #Spin–orbit interaction #cond-mat.mtrl-sci #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.114.257203
published as Physical Review Letters 114, 257203 (2015) · 5 pages, 4 figures
arxiv created 2015/05/29 · openalex publication_date 2015/06/25 · arxiv updated 2015/07/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
The electronic phase diagram of the weak spin-orbit Mott insulator (Sr(1-x)La(x))(3)Ir(2)O(7) is determined via an exhaustive experimental study. Upon doping electrons via La substitution, an immediate collapse in resistivity occurs along with a narrow regime of nanoscale phase separation comprised of antiferromagnetic, insulating regions and paramagnetic, metallic puddles persisting until x≈0.04. Continued electron doping results in an abrupt, first-order phase boundary where the Néel state is suppressed and a homogenous, correlated, metallic state appears with an enhanced spin susceptibility and local moments. As the metallic state is stabilized, a weak structural distortion develops and suggests a competing instability with the parent spin-orbit Mott state.