Phys. rev. lett. Phys. rev. lett. Jahn-Teller Splitting in Single Adsorbed Molecules Revealed by Isospin-Flip Excitations Kügel Jens Hsu Pin-Jui Böhme Markus Schneider Katrhin Senkpiel Jacob Serrate David Universidad de Zaragoza Bode Matthias Lorente Nicolás 2018 research-article