Europhys. Lett.
Volume 75, Number 4, August 2006
Page(s) 611 - 617
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 12 July 2006
Europhys. Lett., 75 (4), pp. 611-617 (2006)
DOI: 10.1209/epl/i2006-10152-3

Power law resistivity behavior in 2D superconductors across the magnetic field-tuned superconductor-insulator transition

G. Sambandamurthy1, 2, A. Johansson1, E. Peled1, D. Shahar1, P. G. Björnsson3 and K. A. Moler3

1  Department of Condensed Matter Physics, Weizmann Institute of Science Rehovot 76100, Israel
2  National High Magnetic Field Laboratory - Tallahassee, FL 32306, USA
3  Department of Applied Physics, Stanford University - Stanford, CA 94305, USA

received 29 March 2006; accepted in final form 28 June 2006
published online 12 July 2006

We present the results of a systematic study of thin films of amorphous indium-oxide near the superconductor-insulator transition. We show that the film's resistivity follows a simple, well-defined, power law dependence on the perpendicular magnetic field. This dependence holds well into the insulating state. Our results suggest that a single mechanism governs the transport of our films in the superconducting as well as insulating phases.

74.25.Fy - Transport properties (electric and thermal conductivity, thermoelectric effects, etc.).
74.78.-w - Superconducting films and low-dimensional structures.
74.25.Dw - Superconductivity phase diagrams.

© EDP Sciences 2006