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Essential dependence of the electron g-tensor on the
quasiparticle momentum is a fundamental and, so far,
largely overlooked property of antiferromagnetic
conductors. It leads to a number of remarkable
phenomena, such as excitation of spin flip transitions
by AC *electric* field. Absorption intensity of these
transitions exceeds that of the common electron spin
resonance (ESR) at least by four orders of magnitude.
I will discuss this and other peculiarities of electron
magnetism in an antiferromagnetic conductor.
The predictions may be relevant to a number of antiferromagnetic conductors, ranging from chromium to borocarbides, from electron- and hole-doped cuprates to organic conductors with spin density wave, and to heavy fermion antiferromagnetic metals. |
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