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

Oct 25, 2016


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)

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