OBSERVATION OF SAW-TOOTH DEHAAS-VANALPHEN OSCILLATION IN A 2-DIMENSIONAL ORGANIC SUPERCONDUCTOR THETA-(BEDT-TTF)2I3

被引：28

作者：

TOKUMOTO, M

SWANSON, AG

BROOKS, JS

TAMURA, M

TAJIMA, H

KURODA, H

机构：

[1] BOSTON UNIV,DEPT PHYS,BOSTON,MA 02215

[2] UNIV TOKYO,FAC SCI,DEPT CHEM,TOKYO 113,JAPAN

来源：

SOLID STATE COMMUNICATIONS | 1990年 / 75卷 / 05期

基金：

美国国家科学基金会; 日本科学技术振兴机构;

关键词：

D O I：

10.1016/0038-1098(90)90597-5

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A "saw-tooth" de Haas-van Alphen oscillation was observed in an organic superconductor θ-(BEDT-TTF)2I3 under the magnetic field H>15 T at T=0.5 K. The fundamental frequency of the oscillation (H0=4170 T) corresponds to the closed Fermi surface area of 50% of the first Brillouin zone, consistent with one positive charge carrier per I3- anion. An issue about the Fermi surface topology is resolved based on the analysis of the dH-vA oscillation frequencies. The "saw-tooth" variation of magnetization demonstrates that organic metals can provide an ideal example of highly two-dimensional and extraordinary clean electron system with a cylindrical Fermi surface along the direction perpendicular to the conducting plane. © 1990.

引用

页码：439 / 444

页数：6

共 20 条

[1] SMALL SAMPLE MAGNETOMETERS FOR SIMULTANEOUS MAGNETIC AND RESISTIVE MEASUREMENTS AT LOW-TEMPERATURES AND HIGH MAGNETIC-FIELDS [J].