Modeling of Evolution of a Complex Electronic System to an Ordered Hidden State: Application to Optical Quench in 1T-TaS2

摘要: Femtosecond techniques addressing phase transitions induced by optical pumps have allowed recently to put an ambitious goal attend hidden states which are inaccessible and even unknown under equilibrium conditions. Recently, the group from Slovenia led D. Mihailovic achieved a bistable switching electronic state in 1T-TaS2. The is stable until erase procedure reverts it thermodynamic ground state. A notoriously intricate nature of this material requires consider simultaneous evolution electrons holes as mobile charge carriers, crystallized modifiable intrinsic defects (voids interstitials); all that on CDW background. Our model considers mutual transformations among three reservoirs electrons, together with heat production, dictated imbalances partial chemical potentials. phenomenological approach sheds light very complicated not yet resolved physics includes interplaying effects like CDW, Wigner crystal, commensurability, polarons, Mott