Collective Excitation of an Electric Dipole on a Molecular Dimer in an Organic Dimer-Mott Insulator

被引：53

作者：

Itoh, K. ^{[1
]}

Itoh, H. ^{[1
,2
]}

Naka, M. ^{[1
]}

Saito, S. ^{[3
]}

Hosako, I. ^{[3
]}

Yoneyama, N. ^{[2
,4
]}

Ishihara, S. ^{[1
,2
]}

Sasaki, T. ^{[2
,5
]}

Iwai, S. ^{[1
,2
]}

机构：

[1] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[2] CREST, JST, Sendai, Miyagi 9808578, Japan

[3] NICT, Koganei, Tokyo 1858795, Japan

[4] Univ Yamanashi, Interdisciplinary Grad Sch Med & Engn, Kofu, Yamanashi 4008511, Japan

[5] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 10期

关键词：

SUPERCONDUCTIVITY; STATE;

D O I：

10.1103/PhysRevLett.110.106401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The terahertz response in 10-100 cm(-1) was investigated in an organic dimer-Mott (DM) insulator kappa-(ET)(2)Cu-2(CN)(3) that exhibits a relaxorlike dielectric anomaly. An similar to 30 cm(-1) band in the optical conductivity was attributable to collective excitation of the fluctuating intradimer electric dipoles that are formed by an electron correlation. We succeeded in observing photoinduced enhancement of this similar to 30 cm(-1) band, reflecting the growth of the electric dipole cluster in the DM phase. Such optical responses in kappa-(ET)(2)Cu-2(CN)(3) reflect an instability near the boundary between the DM-ferroelectric charge ordered phases. DOI: 10.1103/PhysRevLett.110.106401

引用

页数：5

共 29 条

[1] Anomalous dielectric response in the dimer Mott insulator κ-(BEDT-TTF)2Cu2(CN)3 [J].