耦合轨道线性链量子振荡振幅和相位测定的最新进展
Recent developments in the determination of the amplitude and phase of quantum oscillations for the linear chain of coupled orbits
摘要：
研究了费米面（Fermi surface，FS）的De Haas-van Alphen振荡，阐明了Pippard在60年代初提出的模型，即由磁击穿耦合的线性轨道链。该FS拓扑与许多多带准二维（q-2D）有机金属相关，例如详细考虑的$κ$ -（BEDT-TTF）$_2$ Cu（NCS）$_2$和$θ$ -（BEDT-TTF）$_4$ CoBr $_4$（C $_6$ H $_4$ Cl $_2$）。而Lifshits-Kosevich模型只涉及场和温度相关的阻尼因子的一阶发展，二阶项可能对高磁场和低温下这种q-2D系统的傅立叶分量振幅有显著贡献。这些二阶项的强度取决于所涉及的阻尼因子的相对值，而阻尼因子又强烈地依赖于诸如磁击穿场、有效质量以及最重要的有效Landé因子等参数。此外，还考虑了与场有关的Onsager相位因子对振荡谱的影响。
英文摘要：
De Haas-van Alphen oscillations are studied for Fermi surfaces (FS) illustrating the model proposed by Pippard in the early sixties, namely the linear chain of orbits coupled by magnetic breakdown. This FS topology is relevant for many multiband quasi-two dimensional (q-2D) organic metals such as $κ$-(BEDT-TTF)$_2$Cu(NCS)$_2$ and $θ$-(BEDT-TTF)$_4$CoBr$_4$(C$_6$H$_4$Cl$_2$) which are considered in detail. Whereas the Lifshits-Kosevich model only involves a first order development of field- and temperature-dependent damping factors, second order terms may have significant contribution on the Fourier components amplitude for such q-2D systems at high magnetic field and low temperature. The strength of these second order terms depends on the relative value of the involved damping factors, which are in turns strongly dependent on parameters such as the magnetic breakdown field, effective masses and, most of all, effective Landé factors. In addition, the influence of field-dependent Onsager phase factors on the oscillation spectra is considered.
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。
