有机金属（ET）4（H3O）[Fe（C2O4）3]中具有相同截面的闭合轨道和量子干涉仪共存的指示。C6H4Cl2：30 K以上SdH振荡的持续性
Indication for the coexistence of closed orbit and quantum interferometer with the same cross section in the organic metal (ET)4(H3O)[Fe(C2O4)3].C6H4Cl2: Persistence of SdH oscillations above 30 K
摘要：
研究了准二维电荷转移盐$β$“-（ET）$_4$（H $_3$ O）[Fe（C $_2$ O $_4$）$_3$ ] $\cdot$ C $_6$ H $_4$ Cl $_2$在高达54 T脉冲磁场中的Shubnikov-de Haas（SdH）和de Haas-van Alphen（dHvA）振荡谱.这些数据揭示了三个基本频率FPDMATHABMS、FPDMATHABMT和$_{b - a}$，可以用三个低温补偿闭合轨道来解释。然而，对于高于约6 K的SdH谱，证明了具有最高振幅的傅立叶分量FPDMATHAMT的非常弱的热阻尼。结果表明，在高于30 K的温度下，可以观察到磁电阻振荡。这一特点，这是没有观察到的dHvA振荡，是符合量子干涉，指向费米表面重建在这种化合物。
英文摘要：
Shubnikov-de Haas (SdH) and de Haas-van Alphen (dHvA) oscillations spectra of the quasi-two dimensional charge transfer salt $β$"-(ET)$_4$(H$_3$O)[Fe(C$_2$O$_4$)$_3$]$\cdot$C$_6$H$_4$Cl$_2$ have been investigated in pulsed magnetic fields up to 54 T. The data reveal three basic frequencies F$_a$, F$_b$ and F$_{b - a}$, which can be interpreted on the basis of three compensated closed orbits at low temperature. However a very weak thermal damping of the Fourier component F$_b$, with the highest amplitude, is evidenced for SdH spectra above about 6 K. As a result, magnetoresistance oscillations are observed at temperatures higher than 30 K. This feature, which is not observed for dHvA oscillations, is in line with quantum interference, pointing to a Fermi surface reconstruction in this compound.
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