In 1948 Tellegen [Philips Res. Rep. 3, 81 (1948)] suggested that an assembly of the lined up
electric-magnetic dipole twins can construct a new type of an electromagnetic material. Until
now, however, the problem of creation of the Tellegen medium is a subject of strong
discussions. An elementary symmetry analysis makes questionable an idea of a simple
combination of two (electric and magnetic) dipoles to realize local materials with the
Tellegen particles as structural elements. In this paper we show that in search of sources …