Journal
PHYSICAL REVIEW B
Volume 79, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.035106
Keywords
diamagnetism; excited states; magnetic transitions; organic compounds; paramagnetism; photoexcitation; two-photon processes
Funding
- Japan Science and Technology Agency (JST)
- Japan Society for the Promotion of Science (JSPS)
- Ministry of Education, Culture, Sports, Science and Technology (MEXT)
Ask authors/readers for more resources
We have studied excitation energy dependence of the conversion yield of two-photon-mediated phase transition in organic radical 1,3,5-trithia-2,4,6-triazapentalenyl (TTTA) crystal. Even under photoexcitation far below the lowest charge-transfer absorption edge, the photoinduced phase transition takes place from diamagnetic low-temperature phase to paramagnetic high-temperature phase with threshold excitation density. By comparing the excitation energy dependence of the conversion yield with the two-photon absorption spectrum, we found that the conversion is resonantly enhanced by two-photon absorption process. Because of the strong three-dimensional interaction between the excited states of TTTA molecules, the homogeneous two-photon excitation can induce the phase transition with high efficiency.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available