2003/09/30 by T. I. Baturina, D. R. Islamov, J. Bentner +3 · 3 citations
Physics and Astronomy · #Electrical resistivity and conductivity #Magnetic field #Phase (matter) #Phase transition #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum phase transition #Scaling #Superconductivity #Surface and Thin Film Phenomena #Tin #Transition temperature #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1134/1.1765178
published as JETP Letters 79, 337 (2004) · 5 pages, 4 eps figures, RevTeX4, Published version
openalex publication_date 2004/04/01 · arxiv created 2004/09/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Temperature-and magnetic-field-dependent measurements of the resistance of ultrathin superconducting TiN films are presented. The analysis of the temperature dependence of the zero-field resistance indicates an underlying insulating behavior, when the contribution of Aslamazov-Larkin fluctuations is taken into account. This demonstrates the possibility of the coexistence of the superconducting and insulating phases and of a direct transition from the one to the other. The scaling behavior of magnetic field data is in accordance with a superconductor-insulator transition (SIT) driven by quantum phase fluctuations in two-dimensional superconductor. The temperature dependence of the isomagnetic resistance data on the high-field side of the SIT has been analyzed, and the presence of an insulating phase is confirmed. A transition from the insulating to a metallic phase is found at high magnetic fields, where the zero-temperature asymptotic value of the resistance is equal to h / e 2 .