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O: Fachverband Oberflächenphysik
O 51: Poster: Electronic Structure of Surfaces: Spectroscopy, Surface States
O 51.7: Poster
Dienstag, 13. März 2018, 18:15–20:30, Poster B
Probing low-energy correlations on µm length-scales with ultimate energy and momentum resolution — •Eike F. Schwier1, Hideaki Iwasawa2, Mashashi Arita1, Hitoshi Takita3, Umut Mansur3, Akihiro Ino1, Hirofumi Namatame1, Masaki Taniguchi1, Yoshihiro Aiura4, and Kenya Shimada1 — 1Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-0046, Japan — 2Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom — 3Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan — 4National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan
We have developed a µ-ARPES system by combining the advantages of conventional high-resolution laser ARPES and spatially-resolved scanning PES. We use an optical lens system to focus our laser beam down to 5 µm and harness the available spatial resolution by using an XYZ stage with sub-µ precision of movement. Our µ-ARPES machine is able to revealed both intrinsic and extrinsic spatial inhomogeneity in the electronic structure with outstanding accuracy and more generally allows to choose surface regions and light conditions that greatly improve on conventional ARPES results. Here we present examples of our machines performance, focusing on spatially resolved measurements with high energy and/or angular resolution of superconducting materials and topological insulators.