论文标题
sr $ _ {4} $ ru $ _ {3} $ o $ $ $ _ {10} $ sr $ _ {4} $ ru $ _ {4
Fermi surface and kink structures in Sr$_{4}$Ru$_{3}$O$_{10}$ revealed by synchrotron-based ARPES
论文作者
论文摘要
低能电子结构（包括费米表面拓扑，包括流行的metAmagnet Sr $ _ {4} $ ru $ $ _ {3} $ o $ $ $ _ {10} $首次由基于Synchrotron的Angle Angle-Angle-Angle-Resolved Photosemission首次研究。提出了针对光子能量或光子极化的基质元素依赖性的明确定义的准粒子带分散。四个越过费米级的乐队，从而解决了四个费米表面纸。它们的完整地形，有效的质量以及它们的电子和孔特性。这些数据揭示了近薄层带分散体中扭结结构的存在，能量从30 MeV到69 MeV不等。与先前报道的拉曼光谱和晶格动态计算研究一起，数据表明，这些扭结起源于Sr $ _ {4} $ ru $ _ {3} $ o $ $ $ $ $ _ {10} $中的强电子偶联。考虑到Sr $ _ {4} $ ru $ _ {3} $ o $ $ $ _ {10} $的扭结结构与Ruddlesden Popper结构化绘制的其他三名成员相似Sr $ _ {n+1} $ ru $ _ {n} $ o $ _ {3n+1} $化合物是提出的。
The low-energy electronic structure, including the Fermi surface topology, of the itinerant metamagnet Sr$_{4}$Ru$_{3}$O$_{10}$ is investigated for the first time by synchrotron-based angle-resolved photoemission. Well-defined quasiparticle band dispersions with matrix element dependencies on photon energy or photon polarization are presented. Four bands crossing the Fermi-level, giving rise to four Fermi surface sheets are resolved; and their complete topography, effective mass as well as their electron and hole character are determined. These data reveal the presence of kink structures in the near-Fermi-level band dispersion, with energies ranging from 30 meV to 69 meV. Together with previously reported Raman spectroscopy and lattice dynamic calculation studies, the data suggest that these kinks originate from strong electron-phonon coupling present in Sr$_{4}$Ru$_{3}$O$_{10}$. Considering that the kink structures of Sr$_{4}$Ru$_{3}$O$_{10}$ are similar to those of the other three members of the Ruddlesden Popper structured ruthenates, the possible universality of strong coupling of electrons to oxygen-related phonons in Sr$_{n+1}$Ru$_{n}$O$_{3n+1}$ compounds is proposed.
