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Photoemission studies of the fermiology of the high Tc superconductors have played a pivotal role in research into the unconventional electronic behaviour of these systems. Despite this success, it is only in the last 2 years that photoemission data of high quality have been coaxed from layered colossal magnetoresistant manganese oxides. In this talk I'll present our newest high resolution photoemission data from bilayer (La,Sr)3Mn2O7 systems. I will deal with the Fermi surface topology, 'when and where' quasiparticles exist in these systems, as well as the clear signs present of the renormalization of the electronic states due to coupling to bosonic degrees of freedom, wherever possible making the connection to the remarkable magneto-transport properties of these complex systems.
This research is carried out in collaboration with Sanne de Jong, Yingkai Huang and Freek Massee with funding from FOM, the EU and the UvA. Wing Kiu Siu, Iman Santoso, Anton Mans, Wim Koops and Ton Gortenmulder, as well as the staff of the Swiss Light Source and BESSY are thanked for their able assistance. |
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