arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0811.4735cond-mat.str-el
收藏

强关联准二维有机金属(ET)8[ Hg4Cl12(C6H5Br)]2在压力下的Shubnikov-de Haas振荡谱

Shubnikov-de Haas oscillations spectrum of the strongly correlated quasi-2D organic metal (ET)8[Hg4Cl12(C6H5Br)]2 under pressure

David Vignolles, Alain Audouard, Rustem B. Lyubovskii, Marc Nardone, Enric Canadell, Elena I. Zhilayeva, Rimma N. Lyubovskaya

摘要:

本文研究了准二维有机金属(ET)_8 [Hg_4Cl_(12)(C_6H_5Br)]_2在高达54 T的脉冲磁场中的Shubnikov-de Haas(SdH)振荡谱的压力依赖性。根据能带结构计算,其费米面可以看作是一个补偿轨道网络。的SdH光谱表现出许多傅立叶组件典型的这样一个网络,其中大部分被禁止的框架中的半经典模型。它们的振幅仍然很大,在所有的压力范围内研究,这可能排除化学势振荡作为其起源的主要贡献,在最近的计算补偿费米液体相关的协议。除了磁击穿场和有效质量的强烈下降,后者可能是由于电子相关性的强度降低,散射率的相当大的增加被观察到作为所施加的压力的增加。这后一点,这是在方差与大多数电荷转移盐的数据进行了讨论,与压力引起的零场层间电阻的温度依赖性的特点

英文摘要:

Pressure dependence of the Shubnikov-de Haas (SdH) oscillations spectra of the quasi-two di- mensional organic metal (ET)8[Hg4Cl12(C6H5Br)]2 have been studied up to 1.1 GPa in pulsed magnetic fields of up to 54 T. According to band structure calculations, its Fermi surface can be regarded as a network of compensated orbits. The SdH spectra exhibit many Fourier components typical of such a network, most of them being forbidden in the framework of the semiclassical model. Their amplitude remains large in all the pressure range studied which likely rules out chemical potential oscillation as a dominant contribution to their origin, in agreement with recent calculations relevant to compensated Fermi liquids. In addition to a strong decrease of the magnetic breakdown field and effective masses, the latter being likely due to a reduction of the strength of electron correlations, a sizeable increase of the scattering rate is observed as the applied pressure increases. This latter point, which is at variance with data of most charge transfer salts is discussed in connection with pressure-induced features of the temperature dependence of the zero-field interlayer resistance

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑