The research of Prof. Lundgren is focused on surface structure and applying in-situ synchrotron based techniques to material systems under working conditions. Lundgren and co-workers are responsible for three UHV Scanning Probe Microscopy systems at Lund University, and he performs synchrotron based research around the world. The research has led to the discovery of a new set of ultrathin oxides on late transition metals, atomic scale views on nano structures such as quantum dots and nanowires and pioneering work on in situ studies of catalysts and model electrodes under operating conditions. He has published more than 310 peer reviewed articles cited 15500 times and has an h-index of 69.