Probing the quantum many-body states of low-dimensional metals by angular resolved photoelectron spectroscopy

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The quantum many-body problem of correlated electrons is a frontier topic in condensed matter physics and dominates the study of metals and superconductors. Layered 4d transition metal oxides (TMOs) based on ruthenium and rhodium ions are particularly attractive systems to study this problem because they can be grown with unrivaled purity and exhibit a wealth of subtle quantum many-body states. It is proposed to investigate such states by angular resolved photoemission (ARPES). This will provide new insight into fundamental questions underlying the physics of 4d TMOs and may shed light on a variety of poorly understood phases in cuprates and manganites.