Carrier density crossover and quasiparticle mass enhancement in a doped 5 Mott insulator
arXiv:2312.00515 · doi:10.1038/s41567-024-02564-3
Abstract
High-temperature superconductivity in cuprates emerges upon doping the parent Mott insulator. Robust signatures of the low-doped electronic state include a Hall carrier density that initially tracks the number of doped holes and the emergence of an anisotropic pseudogap; the latter characterised by disconnected Fermi arcs, closure at a critical doping level , and, in some cases, a strongly enhanced carrier effective mass. In SrIrO, a spin-orbit-coupled Mott insulator often regarded as a 5 analogue of the cuprates, surface probes have revealed the emergence of an anisotropic pseudogap and Fermi arcs under electron doping, though neither the corresponding nor bulk signatures of pseudogap closing have as yet been observed. Here, we report electrical transport and specific heat measurements on SrLaIrO over an extended doping range 0 0.20. The effective carrier density at low temperatures exhibits a crossover from to near = 0.16, accompanied by \textcolor{blue}{a five-orders-of-magnitude increase in conductivity} and a six-fold enhancement in the electronic specific heat. These striking parallels in the bulk pseudogap phenomenology, coupled with the absence of superconductivity in electron-doped SrIrO, disfavour the pseudogap as a state of precursor pairing and thereby narrow the search for the key ingredient underpinning the formation of the superconducting condensate in doped Mott insulators.
References in corpus (37)
- Fermi-liquid instabilities at magnetic quantum phase transitions
- Destruction of the Fermi Surface in Underdoped High Tc Superconductors
- Twisted Hubbard Model for Sr2IrO4: Magnetism and Possible High Temperature Superconductivity
- Change of carrier density at the pseudogap critical point of a cuprate superconductor
- A Phenomenological Theory of The Pseudogap State
- Cluster Dynamical Mean Field Theory of the Mott Transition
- Fermi Arcs in a Doped Pseudospin-1/2 Heisenberg Antiferromagnet
- Observation of a -wave gap in electron-doped SrIrO
- Monte Carlo study of an unconventional superconducting phase in Ir-oxide J_{eff}=1/2 Mott insulators induced by carrier doping
- Evolution of the Hall Coefficient and the Peculiar Electronic Structure of the Cuprate Superconductors
- Microscopic study of spin-orbit-induced Mott insulator in Ir oxides
- Thermodynamic signatures of quantum criticality in cuprates
- Collapse of the Mott gap and emergence of a nodal liquid in lightly doped SrIrO
- Constant effective mass across the phase diagram of high-T cuprates
- Odd-parity triplet superconductivity in multi-orbital materials with strong spin-orbit coupling: applications to doped Sr2IrO4
- Universality of pseudogap and emergent order in lightly doped Mott insulators
- Fermi-surface transformation across the pseudogap critical point of the cuprate superconductor LaNdSrCuO
- Square Lattice Iridates
- Persistent paramagnons deep in the metallic phase of SrLaIrO
- Electron pairing in the pseudogap state revealed by shot noise in copper-oxide junctions
- Unusual behavior of cuprates explained by heterogeneous charge localization
- Numerically exact full counting statistics of the nonequilibrium Anderson impurity model
- The normal state scattering rate in high-Tc cuprates
- Transfer of spectral weight across the gap of Sr2IrO4 induced by La doping
- Hall effect and Fermi surface reconstruction via electron pockets in the high- cuprates
- Membrane-based nanocalorimeter for high-resolution measurements of low-temperature specific heat
- A Tale of Two Metals: contrasting criticalities in the pnictides and hole-doped cuprates
- Fractionalized Fermi liquid with bosonic chargons as a candidate for the pseudogap metal
- Anisotropic exchange and spin-wave damping in pure and electron-doped SrIrO
- Differentiated roles of Lifshitz transition on thermodynamics and superconductivity in La2-xSrxCuO4
- First-Principles Calculation of Spin and Orbital Contributions to Magnetically Ordered Moments in SrIrO
- Locating the pseudogap closing point in cuprate superconductors: absence of entrant or reentrant behavior
- Phenomenological theories of the low-temperature pseudogap: Hall number, specific heat and Seebeck coefficient
- Origin of the metal-to-insulator crossover in cuprate superconductors
- Evolution of spectral and transport quantities with doping in the SU(2) theory of cuprates
- Wide Range Thin-FIlm Ceramic Metal-Alloy Thermometers with Low Magnetoresistance
- Magnetic Field Tuning of Parallel Spin Stripe Order and Fluctuations near the Pseudogap Quantum Critical Point in LaNdSrCuO