2008/05/31 by Benjamin Sacépé, B. Sacepe, C. Chapelier +5 · 1 citation
Materials Science · Physics and Astronomy · #Condensed matter physics #Electronic and Structural Properties of Oxides #Insulator (electricity) #Materials science #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Quantum tunnelling #Scanning tunneling microscope #Scanning tunneling spectroscopy #Spectroscopy #Superconductivity #Transition temperature #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.101.157006
published as Phys. Rev. Lett. 101, 157006 (2008) · 4 pages, 3 figures. Minor changes. Accepted for publication in Phys. Rev. Lett
arxiv created 2008/09/22 · openalex publication_date 2008/10/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Scanning tunneling spectroscopy at very low temperatures on homogeneously disordered superconducting titanium nitride thin films reveals strong spatial inhomogeneities of the superconducting gap Delta in the density of states. Upon increasing disorder, we observe suppression of the superconducting critical temperature Tc towards zero, enhancement of spatial fluctuations in Delta, and growth of the Delta/Tc ratio. These findings suggest that local superconductivity survives across the disorder-driven superconductor-insulator transition.