Quasiparticle Interference of the van-Hove singularity in Sr${}_2$RuO${}_4$

Abstract

The single-layered ruthenate Sr${}_2$RuO${}_4$ is one of the most enigmatic unconventional superconductors. While for many years it was thought to be the best candidate for a chiral $p$-wave superconducting ground state, desirable for topological quantum computations, recent experiments suggest a singlet state, ruling out the original $p$-wave scenario. The superconductivity as well as the properties of the multi-layered compounds of the ruthenate perovskites are strongly influenced by a van Hove singularity in proximity of the Fermi energy. Tiny structural distortions move the van Hove singularity across the Fermi energy with dramatic consequences for the physical properties. Here, we determine the electronic structure of the van Hove singularity in the surface layer of Sr${}_2$RuO${}_4$ by quasiparticle interference imaging. We trace its dispersion and demonstrate from a model calculation accounting for the full vacuum overlap of the wave functions that its detection is facilitated through the octahedral rotations in the surface layer.

arXiv comment13 pages, 6 figures, and supplementary information

References in corpus (27)

• Imaging Quasiparticle Interference in Bi2Sr2CaCu2O8+d
• Evaluation of Spin-Triplet Superconductivity in Sr2RuO4
• Pronounced drop of ${}^{17}$O NMR Knight shift in superconducting state of Sr${}_2$RuO${}_4$
• Strong Peak in $T_c$ of Sr${}_2$RuO${}_4$ Under Uniaxial Pressure
• Chiral P-Wave Order in Sr_2RuO_4
• Strong spin-orbit coupling effects on the Fermi surface of Sr2RuO4 and Sr2RhO4
• High-resolution photoemission on Sr2RuO4 reveals correlation-enhanced effective spin-orbit coupling and dominantly local self-energies
• Split superconducting and time-reversal symmetry-breaking transitions, and magnetic order in Sr${}_2$RuO${}_4$ under uniaxial stress
• Thermodynamic Evidence for a Two-Component Superconducting Order Parameter in Sr${}_2$RuO${}_4$
• Coherence factors in a high-Tc cuprate probed by quasi-particle scattering off vortices
• Ultrasound evidence for a two-component superconducting order parameter in Sr${}_2$RuO${}_4$
• Microscopic theory of the nematic phase in Sr${}_3$Ru${}_2$O${}_7$
• Direct Observation of a Uniaxial Stress-driven Lifshitz Transition in Sr${}_2$RuO${}_4$
• Knight Shift and Leading Superconducting Instability From Spin Fluctuations in Sr2RuO4
• Momentum Resolved Superconducting Energy Gaps of Sr${}_2$RuO${}_4$ from Quasiparticle Interference Imaging
• Evidence from Tunneling Spectroscopy for a Quasi-One Dimensional Origin of Superconductivity in Sr2RuO4
• Metamagnetism of itinerant electrons in multi-layer ruthenates
• Unconventional metamagnetic electron states in orbital band systems
• Visualization of atomic-scale phenomena in superconductors: application to FeSe
• Systematic approach to the growth of high-quality single-crystals of Sr3Ru2O7
• Microscopic Route to Nematicity in Sr3Ru2O7
• Quasiparticle Interference and Strong Electron-Mode Coupling in the Quasi-One-Dimensional Bands of Sr${}_2$RuO${}_4$
• Universality of scanning tunneling microscopy in cuprate superconductors
• Magnetic-Field Tunable Intertwined Checkerboard Charge Order and Nematicity in the Surface Layer of Sr${}_2$RuO${}_4$
• Towards a quantitative description of tunneling conductance of superconductors: application to LiFeAs
• Multiorbital and hybridization effects in the quasiparticle interference of triplet superconductor Sr2RuO4
• mK-STM Studies of the Temperature- and Field-dependence of the Quasiparticle Spectrum of Sr2RuO4

Cited by in corpus (21)

• Superconducting Instabilities in Strongly-Correlated Infinite-Layer Nickelates
• Structural routes to stabilise superconducting La${}_3$Ni${}_2$O${}_7$ at ambient pressure
• The thickness dependence of quantum oscillations in ferromagnetic Weyl metal SrRuO${}_3$
• On the engineering of higher-order Van Hove singularities in two dimensions
• Compass-like manipulation of electronic nematicity in Sr${}_3$Ru${}_2$O${}_7$
• Relating spin-polarized STM imaging and inelastic neutron scattering in the van-der-Waals ferromagnet Fe3GeTe2
• Low-Energy Electronic Structure in the Unconventional Charge-Ordered State of ScV${}_6$Sn${}_6$
• On the nature of quasiparticle interference in three dimensions
• Spin-orbit coupling induced Van Hove singularity in proximity to a Lifshitz transition in Sr${}_4$Ru${}_3$O${}_{10}$
• Competition between d-wave superconductivity and magnetism in uniaxially strained Sr2RuO4
• Conditions for orbital selective altermagnetism in Sr${}_2$RuO${}_4$: tight binding model, similarities with cuprates and implications on superconductivity
• Superconducting gap symmetry from Bogoliubov quasiparticle interference analysis on {Sr}${}_2${RuO}${}_4$
• calcQPI: A versatile tool to simulate quasiparticle interference
• Magic angle of Sr${}_2$RuO${}_4$: Optimizing correlation-driven superconductivity
• Uniaxial stress effect on the electronic structure of quantum materials
• Emergent exchange-driven giant magnetoelastic coupling in a correlated itinerant ferromagnet
• Signatures of Amorphous Shiba State in FeTe${}_{0.55}$Se${}_{0.45}$
• Probing moiré electronic structures through quasiparticle interference
• Electronic structure of monolayer-CrTe${}_2$: an antiferromagnetic 2D van der Waals material
• Why Scanning Tunneling Microscopy on Sr${}_2$RuO${}_4$ sometimes doesn't see the superconducting gap
• Intermediate band analysis in Green's functions calculations of quasiparticle interference