Diamagnetic vortices in Chern-Simons theory
We find a new type of topological vortex solution in the U(1)(Z) xU(1)(A) Chern-Simons gauge theory in the presence of a U(1)(A) magnetic field background. In this theory U(1)(Z) is broken spontaneously by the U(1)(A) magnetic field. These vortices exhibit long-range interactions as they are charged under the unbroken U(1)(A). They deplete the U(1)(A) magnetic field near their core and also break both charge conjugation and parity symmetries. Understanding the nature of these vortices sheds light on the ground state structure of the superconductivity studied in . We also study the Berezinsky-Kosterlitz-Thouless phase transition in this class of theories and point out that superconductivity can be achieved at high temperatures by increasing the U(1)(A) magnetic field.