Open AccessPump-probe study of β’-(BEDT-TTF)(TCNQ) crystal near antiferromagnetic transition
Author(s) -
H. Mino,
Shiho Tokuda,
Masatoshi Sakai
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1220/1/012044
Subject(s) - excited state , antiferromagnetism , condensed matter physics , reflection (computer programming) , materials science , crystal (programming language) , signal (programming language) , chemistry , atomic physics , physics , computer science , programming language
The photo-excited state properties of an organic Mott-insulator β’-(BEDT-TTF)(TCNQ) crystal were investigated by pump-probe measurements. Considerable change in the pump-probe reflection signal with a wide spectral range was observed near the antiferromagnetic (AF) transition temperature of the TCNQ layers. In the time response, approach to the AF temperature induced the appearance of a slow decay signal whose lifetime was estimated to be about 3 msec maximum. These results indicate that a sustained mechanism exists for photo-excited states near the AF transition, which is probably related to a critical slowing down phenomenon.