Tunneling spectroscopy of the superconducting state of URu2Si2

Abstract

We present measurements of the superconducting gap of URu${}_2$Si${}_2$ made with scanning tunneling microscopy (STM) using a superconducting tip of Al. We find tunneling conductance curves with a finite value at the Fermi level. The density of states is V shaped at low energies, and the quasiparticle peaks are located at values close to the expected superconducting gap from weak coupling BCS theory. Our results point to rather opened gap structures and gap nodes on the Fermi surface.

References in corpus (11)

• Scanning tunneling spectroscopy of high-temperature superconductors
• Imaging the Fano Lattice to 'Hidden Order' Transition in URu2Si2
• Superconducting density of states and vortex cores of 2H-NbS2
• Exotic Superconducting Properties in the Electron-Hole Compensated Heavy Fermion `Semimetal' URu2Si2
• Emergent Rank-5 'Nematic' Order in URu2Si2
• The modulated spin liquid: a new paradigm for URu${}_2$Si${}_2$
• How Kondo Holes Create Intense Nanoscale Heavy-Fermion Hybridization Disorder
• Details of Sample Dependence and Transport Properties of URu2Si2
• Scanning tunneling spectroscopy with superconducting tips of Al
• Study of the magnetic properties of URu2Si2 under uniaxial stress by neutron scattering
• Gap opening with ordering in PrFe4P12 studied by local tunneling spectroscopy

Cited by in corpus (5)

• 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
• Hidden Order Behaviour in URu2Si2 (A Critical Review of the Status of Hidden Order in 2014)
• Superconducting gap and vortex lattice of the heavy fermion compound CeCu_2Si_2
• The surface density of states of layered {\it f}-electron materials