「Electronic phase transitions through time - on a femtosecond timescale」
Prof. Dragan Mihailovic

Oct 25, 2016

日本物理学会北海道支部講演会

講演題目：　Electronic phase transitions through time - on a femtosecond timescale
講　師　：　Prof. Dragan Mihailovic
　　　　　Jozef Stefan institute, Ljubljana, Slovenia
日　時　：　平成28年10月25日 (火) 16:30-18:00
場　所　：　北海道大学 工学部 アカデミックラウンジ3

要　旨　：
The study of phase transitions in real time under nonequilibrium conditions is of fundamental interest in many areas of physics. A special category of recent fundamental and practical interest are transitions to metastable hidden states which occur under conditions of particle-hole asymmetry. While such behavior has been invoked in cosmology to explain Baryogenesis, it is not commonly observed elsewhere. In the quasi-two-dimensional dichalcogenide, 1T-TaS2, conditions for the formation of an electronically textured hidden “false vacuum” state are created by femtosecond laser photoexcitation. Femtosecond photoexcited low temperature scanning tunneling microscopy reveals a remarkable quantum duality of polaron behavior with a vivid real-space illustration of Mott physics. The current system is of practical interest for ultrafast low-energy low-temperature non-volatile memory devices with applications in cryogenic computing.

世話人　 戸田 泰則

北海道大学工学部応用理工系学科　(電話011-706-6115)