Peculiar Fields in Maxwell's Equations
  A theoretical analysis of the excitation of an infinitely long solenoid by oscillating current has revealed the existence of specific potentials in the space outside the solenoid, which can affect electron diffraction in an experiment similar to the Aharonov-Bohm effect. Thus, these time-dependent potentials are physical fields possessing a number of specific features, which set them off from the fields known heretofore. 
A. N. Ageev (Ioffe Physicotechnical Institute, Russian Academy of   Sciences) and A. G. Chirkov (St. Petersburg State Techni...