Electronic states of a strongly correlated two-dimensional system, Pd(dmit)2 salts, controlled by uni-axial strain and counter cations

被引：8

作者：

Kato, R ^{[1
]}

Tajima, A ^{[1
]}

Tajima, N ^{[1
]}

Nakao, A ^{[1
]}

Tamura, M ^{[1
]}

机构：

[1] RIKEN, JST, CREST, Wako, Saitama 3510198, Japan

来源：

JOURNAL DE PHYSIQUE IV | 2004年 / 114卷

关键词：

Pd(dmit)(2); uni-axial strain; resistivity;

D O I：

10.1051/jp4:2004114099

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The uni-axial strain effects in a series of anion radical salts, beta'-Me(4)Z [Pd(dmit)(2)](2), beta'-Et(2)Me(2)Z[Pd(dmit)(2)](2) (Z=P, As, Sb) and Et2Me2N[Pd(dmit)(2)](2) are described. They are classified into a strongly correlated two-dimensional system. The conduction layer consists of strongly dimerized Pd(dmit)(2) units forming a distorted triangular lattice. The electronic structure can be well described by the dimer model. The half-filled conduction band originates from the HOMO of the Pd(dmit)2 molecule. At ambient pressure, these salts are Mott-insulators where the frustration plays a crucial role. The electronic state of this system would be governed the on-site sensitive to the intra- and inter-dimer interactions. The application of uni-axial pressure induces a variety of physical properties including superconductivity. The choice of the counter cation affects the electronic state under the uni-axial strain.

引用

页码：411 / 417

页数：7

共 13 条

[1] ON THE BAND ELECTRONIC-STRUCTURE OF X[M(DMIT)2]2 (X=TTF, (CH3)4N - M=NI, PD) MOLECULAR CONDUCTORS AND SUPERCONDUCTORS [J].