mK-STM Studies of the Temperature- and Field-dependence of the Quasiparticle Spectrum of Sr2RuO4

Abstract

Atomic-resolution scanning tunneling spectroscopy is used to study the spectrum of quasiparticle states in superconducting Sr2RuO4. The measured temperature dependence of the quasiparticle spectrum is consistent with a multi-band superconducting order parameter with one band exhibiting a line of nodes, if a constant density of states offset can be ascribed to a surface effect. In magnetic fields $H<H_{c2}$, a vortex lattice, square and oriented parallel to the <110> direction of the RuO2 lattice, is detected by spectroscopic imaging. Each vortex exhibits one flux quantum and a strong zero-bias conductance peak.

5 pages, 4 figures

References in corpus (6)

• Anomalous charge transport in mesoscopic triplet superconductor junctions
• Observation of Andreev Surface Bound States in the 3-K phase Region of Sr_2RuO_4
• Nodeless spin triplet superconducting gap in Sr2RuO4
• Interface superconductivity in the eutectic Sr2RuO4-Ru: 3-K phase of Sr2RuO4
• Anomalous Transport through the p-Wave Superconducting Channel in the 3-K Phase of Sr2RuO4
• Tunneling properties at the interface between superconducting Sr2RuO4 and a Ru micro-inclusion

Cited by in corpus (5)

• Edge states of Sr${}_2$RuO${}_4$ detected by in-plane tunneling spectroscopy
• Quasiparticle Interference of the van-Hove singularity in Sr${}_2$RuO${}_4$
• Structure of vortex-bound states in spin-singlet chiral superconductors
• Why Scanning Tunneling Microscopy on Sr${}_2$RuO${}_4$ sometimes doesn't see the superconducting gap
• Fingerprints of possible even-parity superconducting states in Sr${}_2$RuO${}_4$ detected by planar tunneling spectroscopy