Fermi surface study of quasi-two-dimensional organic conductors by magnetooptical measurements
Fermi surface study of quasi-two-dimensional organic conductors by magnetooptical measurements
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DOI：
10.1143/jpsj.72.143
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发表时间：
2003-01-01
影响因子：
1.7
通讯作者：
Kajita, K
中科院分区：
文献类型：
--
作者：
Oshima, Y;Ohta, H;Kajita, K
用腔微扰技术对几种具有简单费米面结构的准二维(Q2D)有机导体进行了磁光测量。尽管有简单的费米面结构，但磁光共振结果显示每个样品都有很大的不同。在(BEDT-TTF)(2)I-3和(BEDT-TTF)(3)Br(PBIB)中观察到了回旋共振(CR)，在(BEDT-TTF)(2)BrDIA和(BEDT-TTF)(3)Cl(DFBIB)中观察到了周期轨道共振(POR)。共振的选择似乎与每个样本的皮肤深度相对应。由于多体效应，POR的有效质量似乎有质量增加，而CR的有效质量与电子-电子相互作用的强度无关。文中还给出了由每个共振的线宽推算的散射时间。
Magnetooptical measurements of several quasi-two-dimensional (q2D) organic conductors, which have simple Fermi surface structure, have been performed by using a cavity perturbation technique. Despite of the simple Fermi surface structure, magnetooptical resonance results show a dramatic difference for each sample. Cyclotron resonances (CR) were observed for theta-(BEDT-TTF)(2)I-3 and (BEDT-TTF)(3)Br(pBIB), while periodic orbit resonances (POR) were observed for (BEDT-TTF)(2)Br(DIA) and (BEDT-TTF)(3)Cl(DFBIB). The selection of the resonance seems to correspond with the skin depth for each sample. The effective mass of POR seems to have a mass enhancement due to the many-body effect, while effective mass of CR is independent of the strength of the electron-electron interaction. The scattering time deduced from each resonance's linewidth will be also presented.