Tunable multiphoton Rabi oscillations in an electronic spin system

Sylvain Bertaina (1) , Irinel Chiorescu (2) , N. Groll (2) , Lei Chen (2)

1 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence
2 FSU - Florida State University [Tallahassee]

We report on multiphoton Rabi oscillations and controlled tuning of a multilevel system at room temperature (S = 5/2 for Mn 2+ :MgO) in and out of a quasiharmonic level configuration. The anisotropy is much smaller than the Zeeman splittings, e.g., the six-level scheme shows only a small deviation from an equidistant diagram. This allows us to tune the spin dynamics by compensating for the cubic anisotropy with either a precise static-field orientation or a microwave field intensity. Using the rotating-frame approximation, the experiments are explained very well by both an analytical model and a generalized numerical model. The calculated multiphoton Rabi frequencies are in excellent agreement with the experimental data.

Mots clés: number(s): 7510Dg; 0367−a; 7170Ch; 7630Da

Domaines: Electrons fortement corrélés [cond-mat.str-el]

Sylvain Bertaina, Irinel Chiorescu, N. Groll, Lei Chen. Tunable multiphoton Rabi oscillations in an electronic spin system. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2011, 84 (13), pp.134433-1-134433-8. ⟨10.1103/PhysRevB.84.134433⟩. ⟨hal-01699824⟩