Putative magnetic quantum criticality in (Sr${}_{\text{1-x}}$La${}_{\text{x}}$)${}_{\text{3}}$Ir${}_{\text{2}}$O${}_{\text{7}}$

Abstract

(Sr${}_{1-x}$La${}_x$)${}_3$Ir${}_2$O${}_7$ undergoes a bulk insulator-to-metal transition (IMT) at $x\approx 0.04$. Through careful analysis of previously published data ($x=0.053,0.061,0.076$), we find an extended region below the Debye temperature in which the resistivity appears to scale linearly with temperature. Meanwhile resonant (in)elastic x-ray scattering data ($x=0.065$) suggest a possible crossover from quantum paramagnetic to quantum critical phenomenology between 100 and 200~K. We put this into context with other results, and propose a possible phase diagram as a function of doping.

arXiv commentSubmitted to Physical Review B

References in corpus (26)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Onset of antiferromagnetism in heavy fermion metals
• Theory of Two-Dimensional Quantum Heisenberg Antiferromagnets with a Nearly Critical Ground State
• Scattering and Pairing in Cuprate Superconductors
• Fermi Arcs in a Doped Pseudospin-1/2 Heisenberg Antiferromagnet
• How bad metals turn good: spectroscopic signatures of resilient quasiparticles
• Lattice-Driven Magnetoresistivity and Metal-Insulator Transition in Single-Layered Iridates
• Phenomenology of the normal state in-plane transport properties of high-$T_c$ cuprates
• Collapse of the Mott gap and emergence of a nodal liquid in lightly doped Sr${}_2$IrO${}_4$
• Giant Magnon Gap in Bilayer Iridate Sr3Ir2O7: Enhanced Pseudo-dipolar Interactions Near the Mott Transition
• The influence of electron-doping on the ground state of (Sr{1-x}La{x})2IrO4
• Finite temperature crossovers and the quantum Widom line near the Mott transition
• Bad-metal behavior reveals Mott quantum criticality in doped Hubbard models
• Tuning Jeff = 1/2 Insulating State via Electron Doping and Pressure in Double-Layered Iridate Sr3Ir2O7
• A charge density wave-like instability in a doped spin-orbit-assisted weak Mott insulator
• Dynamics at and near conformal quantum critical points
• Spectroscopic evidence for negative electronic compressibility in a quasi-three-dimensional spin-orbit correlated metal
• Evidence of quantum dimer excitations in Sr${}_3$Ir${}_2$O${}_7$
• First-order melting of a weak spin-orbit Mott insulator into a correlated metal
• A weakly correlated Fermi liquid state with a small Fermi surface in lightly doped Sr${}_3$Ir${}_2$O${}_7$
• Unidirectional spin density wave state in metallic (Sr1-xLax)2IrO4
• Doping Evolution of Magnetic Order and Magnetic Excitations in (Sr${}_{1-x}$La${}_x$)${}_3$Ir${}_2$O${}_7$
• Quantum criticality and the phase diagram of the cuprates
• Disordered dimer state in electron-doped Sr${}_3$Ir${}_2$O${}_7$
• Quantum Nonlinear Sigma Model for Arbitrary Spin Heisenberg Antiferromagnets
• Unveiling the role of competing fluctuations at an unconventional quantum critical point