Itinerant metamagnetism induced by electronic nematic order

It is shown that metamagnetic transition in metals can occur via the formation of electronic nematic order. We consider a simple model where the spin-dependent Fermi surface instability gives rise to the formation of an electronic nematic phase upon increasing the applied Zeeman magnetic field. This leads to two consecutive metamagnetic transitions that separate the nematic phase from the low-field and high-field “isotropic” metallic phases. Possible connection to the physics of the bilayer ruthenate, Sr3Ru2O7, is also discussed.

Hae-Young Kee1 and Yong Baek Kim1,2
1Department of Physics, University of Toronto, Toronto, Ontario, Canada M5S 1A7
2School of Physics, Korea Institute for Advanced Study, Seoul 130-722, Korea