Fermi Surface mapping of Sr$_4$Ru$_3$O$_{10}$ using Angle Resolved Photoemission

Layered strontium ruthenates in the Ruddlesden-Popper series (Sr$_{n+1}$Ru$_n$O$_{3n+1}$) are scientifically interesting and technologically promising materials exhibiting various novel electronic and magnetic properties. We will show the effect of dimensionality on the electronic structure as one goes from two dimensional to three dimensional crystal structures by increasing $n$. In particular, we will present new results and analysis of photon energy dependent angle resolved photoemission spectroscopy measurements on Sr$_4$Ru$_3$O$_{10}$ and make detailed comparison of Fermi surface maps with recently measured Shubnikov-de Haas frequencies and available LDA band structure calculations corresponding to various layered strontium ruthenates. \vspace{.5cm} \\ Work supported by U.S. DOE (DE-AC03-76SF00098 at ALS, DE-FG02-07ER46379 at UM currently) and U.S. NSF (DMR-03-02825 at UM initially, DMR-02-40813 at UK).