Ultrafast optical switching from an ionic to a neutral state in tetrathiafulvalene-p-chloranil (TTF-CA) observed in femtosecond reflection spectroscopy

被引：122

作者：

Iwai, S ^{[1
]}

Tanaka, S

Fujinuma, K

Kishida, H

Okamoto, H

Tokura, Y

机构：

[1] Natl Inst Adv Ind Sci & Technol, CERC, Tsukuba, Ibaraki 3050046, Japan

[2] Univ Tokyo, Dept Adv Mat Sci, Tokyo 1130033, Japan

[3] PRESTO, Struct & Transformat Grp, Tokyo 1130033, Japan

[4] JRCAT, Tsukuba, Ibaraki 3050046, Japan

[5] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.88.057402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Ultrafast optical switching from an ionic (I) to a neutral (N) state in TTF-CA was observed in femtosecond reflection spectroscopy. Charge transfer excitation in the I phase produces N donor (D-0) acceptor (A(0)) strings within 2 ps. These initial N states decay, with a lifetime of 300 ps at 4 K, but rather multiply leading to macroscopic I-N conversion within 20 ps at 77 K just below the N-I transition temperature T-NI. Near T-NI, we also found the evidence for the coherent motion of the macroscopic N-I domain boundary with a period of 85 ps.

引用

页码：574021 / 574024

页数：4

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