Disorder versus two transport lifetimes in a strongly correlated electron liquid

Abstract

We report on angle-dependent measurements of the sheet resistances and Hall coefficients of electron liquids in SmTiO3/SrTiO3/SmTiO3 quantum well structures, which were grown by molecular beam epitaxy on (001) DyScO3. We compare their transport properties with those of similar structures grown on LSAT [(La0.3Sr0.7)(Al0.65Ta0.35)O3]. On DyScO3, planar defects normal to the quantum wells lead to a strong in-plane anisotropy in the transport properties. This allows for quantifying the role of defects in transport. In particular, we investigate differences in the longitudinal and Hall scattering rates, which is a non-Fermi liquid phenomenon known as lifetime separation. The residuals in both the longitudinal resistance and Hall angle were found to depend on the relative orientations of the transport direction to the planar defects. The Hall angle exhibited a robust T2 temperature dependence along all directions, whereas no simple power law could describe the temperature dependence of the longitudinal resistances. Remarkably, the degree of the carrier lifetime separation, as manifested in the distinctly different temperature dependences and diverging residuals near a critical quantum well thickness, was completely insensitive to disorder. The results allow for a clear distinction between disorder-induced contributions to the transport and intrinsic, non-Fermi liquid phenomena, which includes the lifetime separation.

arXiv commentIn press, Sci. Rep

References in corpus (31)

• Electrostatic carrier doping of GdTiO3/SrTiO3 interfaces
• Disorder-Driven Non-Fermi Liquid Behavior of Correlated Electrons
• Evolution of the Hall Coefficient and the Peculiar Electronic Structure of the Cuprate Superconductors
• A Theory of the Longitudinal and Hall Conductivities of the Cuprate Superconductors
• Universal sheet resistance and revised phase diagram of the cuprate high-temperature superconductors
• Common Fermi-liquid origin of T-squared resistivity and superconductivity in n-type SrTiO3
• Phenomenology of the normal state in-plane transport properties of high-$T_c$ cuprates
• Scalable T^2 resistivity in a small single-component Fermi surface
• Quantum Critical Transport and the Hall Angle
• Magnetoelastic coupling in RETiO3 (RE = La, Nd, Sm, Gd, Y)
• Intrinsic high electrical conductivity of stoichiometric SrNbO3 epitaxial thin films
• Normal-state Hall Angle and Magnetoresistance in quasi-2D Heavy Fermion CeCoIn_5 near a Quantum Critical Point
• Carrier-controlled ferromagnetism in SrTiO3
• Toward an artificial Mott insulator: Correlations in confined, high-density electron liquids in SrTiO3
• Interface-induced magnetism in perovskite quantum wells
• Optical spectroscopy shows that the normal state of URu${}_2$Si${}_2$ is an anomalous Fermi liquid
• Phenomenological interpretations of the ac Hall effect in the normal state of YBa2Cu3O7
• How should we interpret the two transport relaxation times in the cuprates ?
• Carrier density independent scattering rate in SrTiO3-based electron liquids
• Dimer Mott Insulator in an Oxide Heterostructure
• Resistivity of non-Galilean-invariant Fermi- and non-Fermi liquids
• Correlation between metal-insulator transitions and structural distortions in high-electron-density SrTiO3 quantum wells
• Hall effect in heavy-fermion metals
• Hidden Fermi-liquid charge transport in the antiferromagnetic phase of the electron-doped cuprates
• Separation of transport lifetimes in SrTiO3-based two-dimensional electron liquids
• Interface-driven ferromagnetism within the quantum wells of a rare earth titanate superlattice
• Magnetotransport properties of BaRuO${}_3$: Observation of two scattering rates
• Transport phenomenology for a holon-spinon fluid
• Kinetic Magnetism at the Interface Between Mott and Band Insulators
• Realization of a "Two Relaxation Rates" in the Hubbard-Falicov-Kimball Model
• Unconventional electron states in $\delta$-doped SmTiO${}_3$