Gigantic photoresponse in 1/4-filled-band organic salt (EDO-TTF)2PF6

被引：299

作者：

Chollet, M

Guerin, L

Uchida, N

Fukaya, S

Shimoda, H

Ishikawa, T

Matsuda, K

Hasegawa, T

Ota, A

Yamochi, H

Saito, G

Tazaki, R

Adachi, S

Koshihara, S

机构：

[1] Tokyo Inst Technol, Dept Mat Sci, Meguro Ku, Tokyo 1528551, Japan

[2] Univ Rennes 1, Grp Mat Condensee & Mat, CNRS, UMR 6626, Rennes, France

[3] Kanagawa Acad Sci & Technol, Takatsu Ku, Kawasaki, Kanagawa 2130012, Japan

[4] Japan Sci & Technol Agcy, PRESTO, Takatsu Ku, Kawasaki, Kanagawa 2130012, Japan

[5] Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan

[6] Kyoto Univ, Div Chem, Sakyo Ku, Kyoto 6068502, Japan

[7] Kyoto Univ, Res Ctr Low Temp & Mat Sci, Sakyo Ku, Kyoto 6068502, Japan

[8] High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan

[9] JST, ERATO, Tsukuba, Ibaraki 3050801, Japan

[10] Chiba Univ, Grad Sch Sci & Technol, Inage Ku, Chiba 2638522, Japan

来源：

SCIENCE | 2005年 / 307卷 / 5706期

关键词：

D O I：

10.1126/science.1105067

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We report that the organic salt (EDO-TTF)(2)PF6 with 3/4-filled-band (1/4-filled in terms of holes), which forms an organic metal with strong electron and lattice correlation, shows a highly sensitive response to photoexcitation. An ultrafast, photoinduced phase transition from the insulator phase to the metal phase can be induced with very weak excitation intensity at near room temperature. This response makes the material attractive for applications in switching devices with room-temperature operation. The observed photoinduced spectroscopic change shows that this photoinduced phase transition process is caused by the cooperative melting of charge ordering assisted by coherent phonon generation.

引用

页码：86 / 89

页数：4

共 31 条

[1]

[Anonymous], PHOTOINDUCED PHASE T

[2] Direct observation of bonding and charge ordering in (EDO-TTF)2PF6 [J].