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We introduce a one dimensional parity-time (PT)-symmetric nonlinear magneticmetamaterial consisted of split ring dimers having both gain and loss. Whennonlinearity is absent we find a transition between an exact to a brokenPT-phase; in the former the system features a two band gapped spectrum withshape determined by the gain and loss coefficients as well as the inter-unitcoupling. In the presence of nonlinearity we show numerically that as a resultof the gain/dissipation matching a novel type of long-lived stable discretebreathers can form below the lower branch of the band with no attenuation. Inthese localized modes the energy is almost equally partitioned between twoadjacent split rings on the one with gain and the other one with loss.

Gain-Driven Discrete Breathers in PT-Symmetric Nonlinear Metamaterials