Strong light-field effects driven by nearly single-cycle 7-fs light field in correlated organic conductors

Abstract

We have demonstrated transient charge localization effects with a driving high-frequency field of 7-fs, 1.5-cycle near infrared light in correlated organic conductors. In a layered organic conductor alpha-(BEDT-TTF)2I3 (BEDT-TTF: bis[ethylenedithio]-tetrathiafulvalene), a transient short-range charge order (CO) state is induced in a metallic phase. In contrast to such drastic change in the electronic state from the metal to the transient CO in alpha-(BEDT-TTF)2I3, dynamics of a field-induced reduction of a transfer integral are captured as a red shift of the plasma-like reflectivity edge in a quasi-one-dimensional organic conductor (TMTTF)2AsF6 (TMTTF: tetramethyltetrathiafulvalene). These studies on the field-induced charge localization have been motivated by the theory of dynamical localization on the basis of tight-binding models with no electron correlation under a strong continuous field. However, the results of pump-probe transient reflectivity measurements using nearly single-cycle 7-fs, 11 MV/cm pulses and the theoretical studies which are presented in this review indicate that the pulsed field contributes to the similar phenomenon with the help of a characteristic lattice structure and Coulomb repulsion.

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• Polarization-dependent magnetic properties of periodically driven $\alpha$-RuCl${}_3$
• Theory for Fourier-limited attosecond pulse generation in solids
• Optically tunable spin Hall effect in periodically driven monolayer transition metal dichalcogenides
• Mechanism for Synchronization of Charge Oscillations in Dimer Lattices
• Photoinduced Pseudospin Polarization in a Three-Orbital Hubbard Model
• Onsager Reciprocal Relations for Charge and Spin Transport in Periodically Driven Systems