Magneto-optic Kerr effect of strongly correlated electron compounds

Abstract

2.1 Waves and polarization-the Jones calculus 6 2.2 Maxwell's equations 9 2.3 Fresnel reflection coefficients 12 2.4 Dispersion relations 3 MICROSCOPIC MODEL FOR THE OPTICAL RESPONSE 3.1 The classical approach-Drude behavior and Lorentz model 3.2 Quantum mechanical derivation 3.3 Band structure calculations

Optical and magneto-optic Kerr effects of MnBi, Ni2MnGa, and Gd5Si2Ge2

“…The motion of a free electron having a mass m and charge -e in the solid can be described as driven damped motion by Newton's second law [12]. A bound electron has the resonance term of a harmonic oscillator m " (im +1 Tt +u°i ') = -eiÊ+ \f t x S) ' (2 - 36) where m* is the effective mass of the electron, 7 is a damping constant, and cuq is the resonance frequency. The external driving force is the Lorentz force from the electromagnetic wave and it has a time dependence of e~l u)t .…”

“…To get an accurate Kerr signal we used polarization modulation and a phase-sensitive detection technique with lock-in amplifiers. The detailed experimental setup is described in elsewhere [36,35].…”