Nodeless spin triplet superconducting gap in Sr2RuO4

Abstract

We report on tunneling spectroscopy measurements using a Scanning Tunneling Microscope (STM) on the spin triplet superconductor Sr2RuO4. We find a negligible density of states close to the Fermi level and a fully opened gap with a value of $\Delta$=0.28 meV, which disappears at T${}_c$ = 1.5 K. $\Delta$ is close to the result expected from weak coupling BCS theory (${\Delta }_0$=1.76kBT${}_c$ = 0.229 meV). Odd parity superconductivity is associated with a fully isotropic gap without nodes over a significant part of the Fermi surface.

References in corpus (22)

• Scanning tunneling spectroscopy of high-temperature superconductors
• Imaging Quasiparticle Interference in Bi2Sr2CaCu2O8+d
• Orbital dependent superconductivity in Sr_2RuO_4
• Superconducting Gap Structure of Spin-Triplet Superconductor Sr_2RuO_4 Studied by Thermal Conductivity
• Gap Structure of the Spin-Triplet Superconductor Sr2RuO4 Determined from the Field-Orientation Dependence of Specific Heat
• Interband proximity effect and nodes of superconducting gap in Sr2RuO4
• Spin-triplet superconductivity in Sr${}_2$RuO${}_4$ probed by Andreev reflection
• Tunneling spectroscopy in small grains of superconducting MgB2
• An Overview of the Basic Physical Properties of MgB${}_2$
• Ultrasound Attenuation in Sr${}_2$RuO${}_4$: an Angle-Resolved Study of the Superconducting Gap Function
• Determination of the Superconducting Gap Structure in All Bands of the Spin-Triplet Superconductor Sr2RuO4
• Anisotropy of magnetothermal conductivity in Sr2RuO4
• Intrinsic atomic scale modulations of the superconducting gap of 2H-NbSe2
• Universal Heat Transport in Sr2RuO4
• On the use of STM superconducting tips at very low temperatures
• Very Low Temperature Tunnelling Spectroscopy in the heavy fermion superconductor PrOs${}_4$Sb${}_{12}$
• Probing the superfluid velocity with a superconducting tip: the Doppler shift effect
• Scanning Tunneling Spectroscopy in MgB 2
• Local superconducting density of states of ErNi2B2C
• Scanning tunneling spectroscopy with superconducting tips of Al
• Cleaving-temperature dependence of layered-oxide surfaces
• Mixed-Parity Superconductivity in Sr2RuO4

Cited by in corpus (35)

• Chiral P-Wave Order in Sr_2RuO_4
• Edge states of Sr${}_2$RuO${}_4$ detected by in-plane tunneling spectroscopy
• A review of two-band superconductivity: materials and effects on the thermodynamic and reversible mixed-state properties
• Imaging superconducting vortex core and lattice with the scanning tunneling microscope
• Crossover from weak to strong pairing in unconventional superconductors
• Evidence from Tunneling Spectroscopy for a Quasi-One Dimensional Origin of Superconductivity in Sr2RuO4
• Chiral charge order in the superconductor 2H-TaS2
• Microscopic theory of tunneling spectroscopy in Sr${}_2$RuO${}_4$
• Pauli-paramagnetic effects on mixed state properties in a strongly anisotropic superconductor ---Application to Sr_2_RuO_4_---
• Magnetic-Field Tunable Intertwined Checkerboard Charge Order and Nematicity in the Surface Layer of Sr${}_2$RuO${}_4$
• Horizontal Line Nodes in Sr2RuO4 Proved by Spin Resonance
• Evidence for spin-triplet odd-parity superconductivity close to type-II van Hove singularities
• Spin gap and L modulated intensity at the low-energy incommensurate magnetic fluctuations in the superconducting state of Sr2RuO4
• Constraints on the superconducting state of Sr${}_2$RuO${}_4$ from elastocaloric measurements
• Enhanced superconductivity at the interface of W/Sr${}_2$RuO${}_4$ point contact
• In-plane magnetic penetration depth in Sr${}_2$RuO${}_4$: muon-spin rotation/relaxation study
• Absence of a large superconductivity-induced gap in magnetic fluctuations of Sr2RuO4
• Identifying possible pairing states in Sr${}_2$RuO${}_4$ by tunneling spectroscopy
• Destruction of surface states of ($d_{zx}+i{d}_{yz}$)-wave superconductor by surface roughness: application to Sr${}_2$RuO${}_4$
• Is the anisotropy of the upper critical field of Sr${}_2$RuO${}_4$ consistent with a helical $p$-wave state?
• Orbital Symmetry and Orbital Excitations in High-$T_c$ Superconductors
• Impurity effect as a probe of the paring symmetry in BiS_{2} based superconductors
• Scanning microscopies of superconductors at very low temperatures
• mK-STM Studies of the Temperature- and Field-dependence of the Quasiparticle Spectrum of Sr2RuO4
• Characterization of Sr2RuO4 Josephson junctions made of epitaxial films
• Magnetic and superconducting phase diagrams in ErNi2B2C
• Anomalous angular dependence of the upper critical induction of orthorhombic ferromagnetic superconductors with completely broken p-wave symmetry
• Magic angle of Sr${}_2$RuO${}_4$: Optimizing correlation-driven superconductivity
• Emergence of the Chern structure using Sr${}_2$RuO${}_4$ nanofilms
• First-order chiral to non-chiral transition in the angular dependence of the upper critical induction of the Scharnberg-Klemm $p$-wave pair state
• Towards a Microscopic Theory of the Knight Shift in an Anisotropic, Multiband Type-II Superconductor
• Distinguishing $d_{xz}+i{d}_{yz}$ and $d_{x^2-y^2}$ pairing in $S{r}_{2}Ru{O}_4$ by high magnetic field H-T phase diagrams
• Why Scanning Tunneling Microscopy on Sr${}_2$RuO${}_4$ sometimes doesn't see the superconducting gap
• Quantum Spin Hall Effect in Electric and Magnetic Fields without Spin-Orbit Coupling
• Fingerprints of possible even-parity superconducting states in Sr${}_2$RuO${}_4$ detected by planar tunneling spectroscopy