Hallmarks of the Mott-Metal Crossover in the Hole Doped J=1/2 Mott insulator Sr2IrO4
arXiv:1406.4978
Abstract
The physics of doped Mott insulators remains controversial after decades of active research, hindered by the interplay among possible competing orders and fluctuations. It is thus highly desired to distinguish the intrinsic characters of the Mott-metal crossover from those of other origins. We investigate the evolution of electronic structure and dynamics of the hole-doped J=1/2 Mott insulator Sr2IrO4. The effective hole doping is achieved by replacing Ir with Rh atoms, with the chemical potential immediately jumping to or near the top of the lower Hubbard band. The doped iridates exhibit multiple exotic features previously observed in doped cuprates - pseudogaps, Fermi "arcs", and marginal-Fermi-liquid-like electronic scattering rates, despite different mechanisms that forbid electron double-occupancy. We argue these universal features of the Mott-metal crossover are not related to preformed electron pairing, quantum criticality or density-wave formation as most commonly discussed. Instead, short-range antiferromagnetic correlations may play an indispensible role.
References in corpus (25)
- Angle-resolved photoemission spectroscopy of the cuprate superconductors
- Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
- The pseudogap in high-temperature superconductors: an experimental survey
- Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
- Charge order driven by Fermi-arc instability in Bi2201
- Quantum magnetism and criticality
- Twisted Hubbard Model for Sr2IrO4: Magnetism and Possible High Temperature Superconductivity
- From a single-band metal to a high-temperature superconductor via two thermal phase transitions
- From a single-band metal to a high-temperature superconductor via two thermal phase transitions (Supporting Material)
- Mobility of the Doped Holes and the Antiferromagnetic Correlations in Underdoped High-T_c Cuprates
- Phase competition in trisected superconducting dome
- The magnetic and crystal structures of Sr2IrO4: A neutron diffraction study
- Lattice-Driven Magnetoresistivity and Metal-Insulator Transition in Single-Layered Iridates
- Fermi Surface Nesting and Nanoscale Fluctuating Charge/Orbital Ordering in Colossal Magnetoresistive Oxides
- Reduced effective spin-orbital degeneracy and spin-orbital ordering in paramagnetic transition metal oxides: Sr2IrO4 vs. Sr2RhO4
- Effective J=1/2 insulating state in Ruddlesden-Popper iridates: An LDA+DMFT study
- Spin-orbit tuned metal-insulator transitions in single-crystal Sr2Ir1-xRhxO4 (0\leqx\leq1)
- The Origin and Non-quasiparticle Nature of Fermi Arcs in BiSrCaCuO
- Evolution of a Metal to Insulator Transition in CaNaCuOCl, as seen by ARPES
- Dilute Magnetism and Spin-Orbital Percolation Effects in Rh-doped Sr2IrO4
- Dimensionality controlled Mott transition and correlation effects in single- and bi-layer perovskite iridates
- The "Strange Metal" is a Projected Fermi Liquid with Edge Singularities
- Evolution from a nodeless gap to d(x2-y2) form in underdoped La(2-x)SrxCuO4
- Carrier localization and electronic phase separation in a doped spin-orbit driven Mott phase in Sr3(Ir1-xRux)2O7
- The electronic structure of the high-symmetry perovskite iridate Ba2IrO4