Volume 77, Number 1, January 2007
Article Number 17005
Number of page(s) 5
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
Published online 05 January 2007
EPL, 77 (2007) 17005
DOI: 10.1209/0295-5075/77/17005

Single-molecule spectroscopy as a possible tool to study the electric field in superconductors

M. Fauré1, B. Lounis2, 3 and A. I. Buzdin2, 3

1  Theoretische Physik, ETH-Hönggerberg - CH-8093 Zürich, Switzerland
2  Centre de Physique Moléculaire Optique et Hertzienne, Université Bordeaux 1-UMR 5798 CNRS - F-33405 Talence Cedex, France
3  Institut Universitaire de France - Paris, France

received 30 October 2006; accepted in final form 9 November 2006; published January 2007
published online 5 January 2007

We discuss the influence of the superconducting transition in a film on the fluorescence spectrum of the single molecule located nearby. We show that single-molecule spectroscopy (SMS) should be an appropriate tool to detect the electric charge associated with a vortex line. Also we argue that the electric field must appear at the boundaries between normal and superconducting regions of the intermediate phase and SMS could be useful to study this effect.

74.25.-q - Properties of type I and type II superconductors .
74.25.Qt - Vortex lattices, flux pinning, flux creep .
42.62.Fi - Laser spectroscopy .

© Europhysics Letters Association 2007