Abstract of the Invited talk presents evidence for pair formation and phase coherence occuring in sequence
B.04 Guest lecture
COBISS.SI-ID: 26783527We introduce a new write-pump-probe technique to study the symmetry breaking transition in 1T-TaS2 single crystals and thin layers. By illumination of a single 50 fs laser pulse we quench the system into a new hidden high symmetry state (ON state) which can be reached only via optical path and it is stable up to 100 K. The recovery of the system (OFF state) to its CCDW state can be achieved by application of a train of long 50 ps pulses. The switching ON/OFF is repeatable and accompanied with a change in reflectivity and DC resistance, opening a new possibility of a generation of ultrafast non-volatile memory devices.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 26614055With our new experimental method we can achieve real-time high resolution investigations of the critical system trajectories through symmetry-breaking transitions in different complex systems which belong to a number of different universality classes and include the study of nontrivial transitions to newly discovered hidden states of matter. We investigate coherent collective field oscillations and the fundamentals of topological defect creation by the Kibble-Zurek mechanism including a study of their annihilation in the aftermath of symmetry-breaking transitions. We aim to control the coherent trajectories at bifurcation points by laser pulses and external fields. Transition trajectories to and from hidden states are of particular interest for practical applications in new femtosecond state change memory devices.
B.04 Guest lecture
COBISS.SI-ID: 26664487