Characterization of the Fermi surface of the organic superconductor - by measurements of Shubnikov-de Haas and angle-dependent magnetoresistance oscillations and by electronic band-structure calculations
Characterization of the Fermi surface of the organic superconductor - by measurements of Shubnikov-de Haas and angle-dependent magnetoresistance oscillations and by electronic band-structure calculations
复制标题
有机超导体费米表面的表征 - 通过 Shubnikov-de Haas 测量和角度相关磁阻振荡以及电子能带结构计算
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
M. whangbo
中科院分区：
文献类型：
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作者：
D. Beckmann;S. Wanka;J. Wosnitza;J. Schlueter;J. Williams;P. Nixon;R. Winter;G. Gard;J. Ren;M. whangbo
翻译后摘要：准二维（2D）的有机超导体-（ET）2SF 5CH 2CF 2SO 3的电子结构进行了研究，通过测量Shubnikov-de哈斯（SdH）和角度相关的磁阻（AMRO）振荡，并通过比较与电子能带结构计算。SdH振荡频率遵循预期的2D费米面（FS）的角度依赖性，所观察到的基频表明，2D FS是5%的第一布里渊区的大小。AMRO数据表明，二维FS的形状是显着的非圆形。计算的电子结构具有与实验基本一致的二维FS。从温度和角度依赖的SdH振幅，回旋和带的有效质量估计为，其中g是传导电子g因子和自由电子质量。带有效质量估计是从计算的电子能带结构。
Abstract:The electronic structure of the quasi two-dimensional (2D) organic superconductor -(ET)2SF5CH2CF2SO3 was examined by measuring Shubnikov-de Haas (SdH) and angle-dependent magnetoresistance (AMRO) oscillations and by comparing with electronic band-structure calculations. The SdH oscillation frequencies follow the angular dependence expected for a 2D Fermi surface (FS), and the observed fundamental frequency shows that the 2D FS is 5% of the first Brillouin zone in size. The AMRO data indicate that the shape of the 2D FS is significantly non-circular. The calculated electronic structure has a 2D FS in general agreement with experiment. From the temperature and angular dependence of the SdH amplitude, the cyclotron and band effective masses were estimated to be and ,where g is the conduction electron g factor and the free electron mass. The band effective mass is estimated to be from the calculated electronic band structure.