Essential dependence of the electron g-factor on the quasiparticle momentum is a fundamental and, so far, largely overlooked property of antiferromagnetic conductors.  I will discuss its symmetry underpinnings and some of its experimental consequences.

The predictions may be relevant to a number of antiferromagnetic conductors, ranging from chromium to electron- and hole-doped cuprates, borocarbides, iron pnictides, organic and heavy fermion materials.