Band-selective modification of the magnetic fluctuations in Sr2RuO4: A study of substitution effects

  title={Band-selective modification of the magnetic fluctuations in Sr2RuO4: A study of substitution effects},
  author={Naoki Kikugawa and Christoph Bergemann and Andrew P. Mackenzie and Yoshiteru Maeno},
  journal={Physical Review B},
We report a study of magnetic, thermal, and transport properties of La(3+) substituted Sr2RuO4, performed in order to investigate the effects of additional electron doping in this correlated metal. A gradual enhancement of the electronic part of specific heat and a more drastic increase of the static magnetic susceptibility were observed in Sr(2-y)La(y)RuO(4) with increasing y. Furthermore, the quasi-two-dimensional Fermi-liquid behavior seen in pure Sr2RuO4 breaks down near the critical… Expand
New magnetic phase diagram of (Sr,Ca)2RuO4.
Using muon spin relaxation and magnetic susceptibility measurements, it is demonstrated here that (Sr,Ca)(2)RuO(4) has a ground state with static magnetic order over nearly the entire range of (Ca, Sr) substitution, with spin-glass behaviour in Sr(1.5)Ca(0.5). Expand
Theory of Transport Properties in the p-Wave Superconducting State of Sr2RuO4 –A Microscopic Determination of the Gap Structure–
We provide a detailed quantitative analysis of transport properties in the p -wave superconducting state of Sr 2 RuO 4 . Specifically, we calculate ultrasound attenuation rate and electronic thermalExpand
Renormalized band structure of Sr2RuO4: A quasiparticle tight-binding approach
a b s t r a c t We derive an effective quasiparticle tight-binding model which is able to describe with high accuracy the low-energy electronic structure of Sr2RuO4 obtained by means of lowExpand
Ferromagnetism, spiral magnetic structures and phase separation in the two-dimensional Hubbard model
Abstract The quasistatic approximation and equation-of-motion decoupling for the electron Green's functions are applied to trace the effect of electronic dispersion and electron correlations on theExpand
Strong peak in Tc of Sr2RuO4 under uniaxial pressure
It is shown that uniaxial pressure can induce profound changes in the superconductivity of one of the model materials in the field, Sr2RuO4, and demonstrated using explicit calculations how the findings provide strong constraints on theory. Expand
Breakdown of the Wiedemann-Franz law at the Lifshitz point of strained Sr$_2$RuO$_4$
Strain tuning Sr2RuO4 through the Lifshitz point, where the Van Hove singularity of the electronic spectrum crosses the Fermi energy, is expected to cause a change in the temperature dependence ofExpand
Kondo effect in the presence of van Hove singularities: A numerical renormalization group study
A numerical renormalization group (NRG) investigation of the one-centre $t-t'$ Kondo problem is performed for the square lattice with account of logarithmic Van Hove singularities (VHS) in theExpand
Giant intrinsic spin and orbital hall effects in Sr2MO4 (M=Ru, Rh, Mo).
The huge SHC and OHC generated by the "effective Aharonov-Bohm phase" are expected to be ubiquitous in multiorbital transition metal compounds, which opens the possibility of realizing spintronics as well as "orbitronics" devices. Expand
Magnetic fluctuations and self-energy effects in two-dimensional itinerant systems with a van Hove singularity in the electronic spectrum
We investigate a competition of tendencies towards ferromagnetic and incommensurate order in two-dimensional fermionic systems within functional renormalization group technique using temperature as aExpand
Strain Control of Fermiology and Many-Body Interactions in Two-Dimensional Ruthenates.
This work demonstrates the possibilities for using epitaxial strain as a disorder-free means of manipulating emergent properties, many-body interactions, and potentially the superconductivity in correlated materials. Expand


Transport, magnetic, thermodynamic and optical properties in Ti-doped Sr2RuO4
We report on electrical resistivity, magnetic susceptibility, and magnetization on heat-capacity and optical experiments in single crystals of Sr 2 Ru 1 - x Ti x O 4 . Samples with x = 0.1 and 0.2Expand
Electronic structures and magnetic properties in Sr1-xLaxRuO3 (0.0⩽x⩽0.5)
In order to find out more about the suppression of ferromagnetic (FM) interactions in Sr1-xLaxRuO3, electronic structures and magnetic properties have been investigated upon changing x from 0.0 toExpand
Two-Dimensional Fermi Liquid Behavior of the Superconductor Sr2RuO4
We report detailed normal state measurements of the resistivity, magnetic susceptibility and specific heat of high-quality single crystals of Sr 2 RuO 4 , the only copper-free, layered perovskiteExpand
Quasi-two-dimensional Fermi liquid properties of the unconventional superconductor Sr2RuO4
In this paper, we review a large set of experimental data acquired over the past decade by several groups, and demonstrate how it can be used to construct a detailed picture of the low-temperatureExpand
Quantum oscillations and overcritical torque interaction in Sr2RuO4
Abstract Sr 2 RuO 4 is the only known layered perovskite oxide superconductor without copper; there is strong evidence for an unconventional (`p-wave') pairing mechanism, and it has recently beenExpand
Evolution of Fermi-liquid interactions in Sr2RuO4 under pressure.
Using the Shubnikov-de Haas effect, it is found that the Fermi surface sheet believed to be primarily responsible for superconductivity becomes more two-dimensional with increasing pressure, a surprising result that is, however, consistent with a recent model of orbital-dependentsuperconductivity in this system. Expand
Perturbation Theory of Spin-Triplet Superconductivity for Sr2RuO4.
We discuss the possibility of spin-triplet superconductivity within the third order perturbation theory with respect to on-site Coulomb repulsion U . Critical temperature T c for spin-triplet pairingExpand
Evolution of normal-state magnetic fluctuations by Ca and Ti substitutions in Sr 2 RuO 4 : 87 Sr-NMR study
We report magnetic properties of (Sr 2 - x Ca x )RuO 4 and Sr 2 (Ru 1 - y Ti y )O 4 investigated by 8 7 Sr nuclear magnetic resonance NMR to shed light on the effect of multibands on the magneticExpand
Non-fermi-liquid behavior in Sr2RuO4 with nonmagnetic impurities.
We report that the quasi-two-dimensional Fermi-liquid behavior of the spin-triplet superconductor Sr2RuO4 breaks down in the vicinity of the critical impurity concentration for the onset of magneticExpand
Relationship of Sr2RuO4 to the superconducting layered cuprates.
  • M. S. Singh
  • Physics, Medicine
  • Physical review. B, Condensed matter
  • 1995
The electronic properties are related to those of the cuprates, with the exception that Coulomb correlations are expected to be much less significant due to the larger bandwidth and smaller on-site energy. Expand